2022

Paul Strenge, Birgit Lange, Christin Grill, Wolfgang Draxinger, Veit Danicke, Dirk Theisen-Kunde, Christian Hagel, Sonja Spahr-Hess, Matteo M. Bonsanto, Robert Huber, Heinz Handels, and Ralf Brinkmann,
Registration of histological brain images onto optical coherence tomography images based on shape information, Physics in Medicine & Biology , Jun. 2022.
DOI:10.1088/1361-6560/ac6d9d
Bibtex: BibTeX
@article{Strenge2022,
   author = {Strenge, P;Lange, B;Grill, C;Draxinger, W;Danicke, V;Theisen-Kunde, D;Hagel, C;Spahr-Hess, S;Bonsanto, Matteo M.;Huber, R;Handels, H and Brinkmann, R},
   title = {Registration of histological brain images onto optical coherence tomography images based on shape information},
keywords = {brain, glioblastoma multiforme, shape, OCT, optical coherence tomography, AG-Huber_OCT,},
   journal = {Physics in Medicine & Biology},
   ISSN = {0031-9155},
   url = {http://iopscience.iop.org/article/10.1088/1361-6560/ac6d9d},
   year = {2022},
   type = {Journal Article}
}
Madita Göb, Tom Pfeiffer, Wolfgang Draxinger, Simon Lotz, Jan Philip Kolb, and Robert Huber,
Continuous spectral zooming for in vivo live 4D-OCT with MHz A-scan rates and long coherence, Biomed. Opt. Express , vol. 13, no. 2, pp. 713--727, Feb. 2022. OSA.
DOI:10.1364/BOE.448353
Bibtex: BibTeX
@article{Gob:22,
author = {Madita G\"{o}b and Tom Pfeiffer and Wolfgang Draxinger and Simon Lotz and Jan Philip Kolb and Robert Huber},
journal = {Biomed. Opt. Express},
keywords = {High speed imaging; Image processing; Image quality; In vivo imaging; Range imaging; Vertical cavity surface emitting lasers},
number = {2},
pages = {713--727},
publisher = {Optica Publishing Group},
title = {Continuous spectral zooming for in vivo live 4D-OCT with MHz A-scan rates and long coherence},
volume = {13},
month = {Feb},
year = {2022},
url = {https://opg.optica.org/boe/abstract.cfm?URI=boe-13-2-713},
doi = {10.1364/BOE.448353},
abstract = {We present continuous three-dimensional spectral zooming in live 4D-OCT using a home-built FDML based OCT system with 3.28 MHz A-scan rate. Improved coherence characteristics of the FDML laser allow for imaging ranges up to 10 cm. For the axial spectral zoom feature, we switch between high resolution and long imaging range by adjusting the sweep range of our laser. We present a new imaging setup allowing for synchronized adjustments of the imaging range and lateral field of view during live OCT imaging. For this, a novel inline recalibration algorithm was implemented that enables numerical k-linearization of the raw OCT fringes for every frame instead of every volume. This is realized by acquiring recalibration data within the dead time of the raster scan at the turning points of the fast axis scanner. We demonstrate in vivo OCT images of fingers and hands at different resolution modes and show real three-dimensional zooming during live 4D-OCT. A three-dimensional spectral zooming feature for live 4D-OCT is expected to be a useful tool for a wide range of biomedical, scientific and research applications, especially in OCT guided surgery.},
}
Christin Grill, Torben Blömker, Mark Schmidt, Dominic Kastner, Tom Pfeiffer, Jan Philip Kolb, Wolfgang Draxinger, Sebastian Karpf, Christian Jirauschek, and Robert Huber,
Towards phase-stabilized Fourier domain mode-locked frequency combs, Communications Physics , vol. 5, no. 1, Aug. 2022. Springer Science and Business Media LLC.
DOI:10.1038/s42005-022-00960-w
Bibtex: BibTeX
@article{Grill2022,
  doi = {10.1038/s42005-022-00960-w},
  year = {2022},
  publisher = {Springer Science and Business Media {LLC}},
  volume = {{5}},
  number = {{1}},
  author = {C. Grill, T. Bl\"{o}mker, M. Schmidt, D. Kastner, T. Pfeiffer, J.P. Kolb, W. Draxinger, S. Karpf, C. Jirauschek and R. Huber},
  title = {Towards phase-stabilized Fourier domain mode-locked frequency combs},
  journal = {{Communications Physics}},
keywords={AG-Huber_FDML, FDML, Fourier domain mode locking, phase, frequency comb, coherence, beating}
}
Konstantin Yashin, Matteo Mario Bonsanto, Ksenia Achkasova, Anna Zolotova, Al-Madhaji Wael, Elena Kiseleva, Alexander Moiseev, Igor Medyanik, Leonid Kravets, Robert Huber, Ralf Brinkmann, and Natalia Gladkova,
OCT-Guided Surgery for Gliomas: Current Concept and Future Perspectives, Diagnostics , vol. 12, no. 2, pp. 335, Jan. 2022.
DOI:10.3390/diagnostics12020335
Datei: 335
Bibtex: BibTeX
@article{Yashin-2022,
   author = {Yashin, K;Bonsanto, M M;Achkasova, K;Zolotova, A;Wael, Al-M;Kiseleva, E;Moiseev, A;Medyanik, I;Kravets, L;Huber, R;Brinkmann, R and Gladkova, N},
   title = {OCT-Guided Surgery for Gliomas: Current Concept and Future Perspectives},
   journal = {Diagnostics},
   volume = {12},
   number = {2},
   pages = {335},
   ISSN = {2075-4418},
keywords = {AG-Huber; optical coherence tomography; brain imaging; neurosurgical guidance; brain tumor; minimally invasive theranostics; intraoperative imaging},
   url = {https://www.mdpi.com/2075-4418/12/2/335},
   year = {2022},
   type = {Journal Article}
}
Marie Klufts, Simon Lotz, Muhammad Asim Bashir, Sebastian Karpf, and Robert Huber,
Ultra-high-accuracy chromatic dispersion measurement in optical fibers, in Optical Components and Materials XIX , Shibin Jiang and Michel J. F. Digonnet, Eds. SPIE, Mä.2022. pp. 119970L.
DOI:10.1117/12.2608773
Bibtex: BibTeX
@inproceedings{10.1117/12.2608773,
author = {M. Klufts and S. Lotz and M. Bashir and S. Karpf and R. Huber},
title = {{Ultra-high-accuracy chromatic dispersion measurement in optical fibers}},
volume = {11997},
booktitle = {Optical Components and Materials XIX},
editor = {Shibin Jiang and Michel J. F. Digonnet},
organization = {International Society for Optics and Photonics},
publisher = {SPIE},
pages = {119970L},
abstract = {The chromatic dispersion in optical fibers is a key property for applications where a broadband light source is used and the timing of each individual wavelength is crucial. Counteracting the timing offset introduced by the fiber is a challenge in many applications especially in mode locked lasers. The dispersion parameters need to be measured with high precision. The length of the fiber, the temperature, and the used wavelength will highly impact the amount of dispersion and the accuracy of the measurement. We developed an ultra-high-accuracy dispersion measurement setup at 1080 ± 50 nm considering all the parameters that may influence the measurement. It is based on a home-built wavelength tunable laser where the output is modulated by an electro-optical modulator connected to a 24 GSamples/s arbitrary waveform generator to a complex pattern consisting of pulses and a 4 GHz sine wave. After passing through the fiber the signal is measured with an 80 GSamples/s real time oscilloscope. The fiber’s temperature is controlled to allow for reproducible measurements over several days and we achieve timing measurement accuracies down to ~200 fs. We also present the performance of the setup at ~850 nm. We will discuss and quantify all effects which can negatively impact the system accuracy and we will report on more cost-effective options using lower performance equipment.},
keywords = {Dispersion measurement, Chromatic dispersion, fiber dispersion measurement, optical component characterization, tunable laser, FDML},
year = {2022},
doi = {10.1117/12.2608773},
URL = {https://doi.org/10.1117/12.2608773}
}
Madita Göb, Sazgar Burhan, Simon Lotz, and Robert Huber,
Towards ultra-large area vascular contrast skin imaging using multi-MHz-OCT, in Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVI , Joseph A. Izatt and James G. Fujimoto, Eds. SPIE, Mä.2022. pp. 27 -- 31.
DOI:10.1117/12.2612171
Weblink: https://zenodo.org/records/19851724
Bibtex: BibTeX
@inproceedings{10.1117/12.2612171,
author = {Madita G{\"o}b and Sazgar Burhan and Simon Lotz and Robert Huber},
title = {{Towards ultra-large area vascular contrast skin imaging using multi-MHz-OCT}},
volume = {11948},
booktitle = {Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVI},
editor = {Joseph A. Izatt and James G. Fujimoto},
organization = {International Society for Optics and Photonics},
publisher = {SPIE},
pages = {1194807},
abstract = {We demonstrate ultra-large field of view OCT scanning using standard optics, a X-Y-galvanometer scanner and a synchronously driven motorized XYZ-positioning stage. The integration of a movable stage into our self-built 3.3 MHz- OCT system allows acquiring coherent ultra-large area images, fully leveraging the high speed potential of our system. For fast OCT-angiography, one galvanometer axis scanner is driven in a repetitive sawtooth pattern, fully synchronized to the movement of the linear stage, to obtain multiple measurements at each position. This technique requires exact synchronization, precise repositioning, and uniform movements with low tolerances to ensure a minimum revisitation error. We analyze error and performance of our setup and demonstrate angiographic imaging.},
keywords = {Optical Coherence Tomography, Fourier Domain Mode Locking, FDML, Optical Coherence Angiography, OCTA, Medical optics and biotechnology, Medical imaging, Three-dimensional image acquisition, Scanners, Microscopy},
year = {2022},
doi = {10.1117/12.2612171},
URL = {https://doi.org/10.1117/12.2612171}
}
Linh Ha-Wissel, Handan Yasak, Robert Huber, Detlef Zillikens, Ralf J. Ludwig, Diamant Thaci, and Jennifer E. Hundt,
Case report: Optical coherence tomography for monitoring biologic therapy in psoriasis and atopic dermatitis, Frontiers in Medicine , vol. 9, Sep. 2022.
DOI:10.3389/fmed.2022.995883
Datei: fmed.2022.995883
Bibtex: BibTeX
@article{RN5359,
   author = {Ha-Wissel, L.;Yasak, H.;Huber, R.;Zillikens, D.;Ludwig, R. J.;Thaçi, D. and Hundt, J. E.},
   title = {Case report: Optical coherence tomography for monitoring biologic therapy in psoriasis and atopic dermatitis},
   journal = {Front Med (Lausanne)},
   volume = {9},
   pages = {995883},
   ISSN = {2296-858X (Print)
2296-858x},
   DOI = {10.3389/fmed.2022.995883},
   year = {2022},
   type = {Journal Article}
}
Aaron Doug Deen, Heleen van Beusekom, Tom Pfeiffer, Mathijs Stam, Dominique de Kleijn, Jolanda Wentzel, Robert Huber, Antonius F. W. van der Steen, Gijs van Soest, and Tianshi Wang,
Spectroscopic thermo-elastic optical coherence tomography for tissue characterization, Biomedical Optics Express , vol. 13(3), pp. 1430-1446, Feb. 2022.
DOI:10.1364/BOE.447911
Bibtex: BibTeX
@article{Deen2022,
   author = {Deen, A D;Van Beusekom, H M. M.;Pfeiffer, T;Stam, M;Kleijn, D De;Wentzel, J;Huber, R;Van Der Steen, A F. W.;Soest, G Van and Wang, T},
   title = {Spectroscopic thermo-elastic optical coherence tomography for tissue characterization},
   journal = {BioOptExpr},
keywords = {AG-Huber, Endoscopic imaging, Image processing, Image quality, Imaging techniques, Optical imaging, Tissue characterization},
   volume = {13(3)},
   pages = {1430-1446},
   DOI = {10.1364/BOE.447911},
    year = {2022},
   type = {Journal Article}
}
Caren Jacobi, Madita Göb, Robert Huber, Ralf. J. Ludwig, and Jennifer Hundt,
620 Screening an inhibitor library for new drug candidates to promote wound healing, Journal of Investigative Dermatology , vol. 142, no. 12, Supplement, pp. S288, Nov. 2022.
DOI:https://doi.org/10.1016/j.jid.2022.09.637
Datei: S0022202X22025714
Bibtex: BibTeX
@article{JACOBI2022S288,
title = {620 Screening an inhibitor library for new drug candidates to promote wound healing},
journal = {Journal of Investigative Dermatology},
volume = {142},
number = {12, Supplement },
pages = {S288},
year = {2022},
note = {ESDR 2022 Meeting Abstract Supplement},
issn = {0022-202X},
doi = {https://doi.org/10.1016/j.jid.2022.09.637},
url = {https://www.sciencedirect.com/science/article/pii/S0022202X22025714},
author = {C. Jacobi and M. Göb and R. Huber and R.J. Ludwig and J.E. Hundt}
}
Özüm Emre Aşırım, Robert Huber, and Christian Jirauschek,
Influence of the linewidth enhancement factor on the signal pattern of Fourier domain mode-locked lasers, Applied Physics B , vol. 18(12), Nov. 2022.
DOI:10.1007/s00340-022-07933-5
Bibtex: BibTeX
@article{RN5426,
   author = {Aşırım, Özüm Emre;Huber, Robert and Jirauschek, Christian},
   title = {Influence of the linewidth enhancement factor on the signal pattern of Fourier domain mode-locked lasers},
   journal = {Applied Physics B},
   volume = {128},
   number = {12},
   pages = {218},
   ISSN = {1432-0649},
   DOI = {10.1007/s00340-022-07933-5},
   url = {https://doi.org/10.1007/s00340-022-07933-5},
   year = {2022},
   type = {Journal Article}
}
Tianshi Wang, Tom Pfeiffer, Ali Akyildiz, Heleen M. M. Beusekom, Robert Huber, Antonius F. W. Steen, and Gijs Soest,
Intravascular optical coherence elastography, Biomed. Opt. Express , vol. 13, no. 10, pp. 5418--5433, Okt. 2022. Optica Publishing Group.
DOI:10.1364/BOE.470039
Datei: abstract.cfm
Bibtex: BibTeX
Optical coherence elastography (OCE), a functional extension of optical coherence tomography (OCT), visualizes tissue strain to deduce the tissue’s biomechanical properties. In this study, we demonstrate intravascular OCE using a 1.1 mm motorized catheter and a 1.6 MHz Fourier domain mode-locked OCT system. We induced an intraluminal pressure change by varying the infusion rate from the proximal end of the catheter. We analysed the pixel-matched phase change between two different frames to yield the radial strain. Imaging experiments were carried out in a phantom and in human coronary arteries in vitro. At an imaging speed of 3019 frames/s, we were able to capture the dynamic strain. Stiff inclusions in the phantom and calcification in atherosclerotic plaques are associated with low strain values and can be distinguished from the surrounding soft material, which exhibits elevated strain. For the first time, circumferential intravascular OCE images are provided side by side with conventional OCT images, simultaneously mapping both the tissue structure and stiffness.
Özüm Emre Aşırım, Robert Huber, and Christian Jirauschek,
Effect of Self-Phase Modulation on The Signal Quality of Fourier Domain Mode-Locked Lasers, in 2022 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD) , 2022. pp. 67-68.
DOI:10.1109/NUSOD54938.2022.9894816
Bibtex: BibTeX
@INPROCEEDINGS{9894816,
  author={Aşırım, Ö. E. and Huber, R. and Jirauschek, C.},
  booktitle={2022 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)}, 
  title={Effect of Self-Phase Modulation on The Signal Quality of Fourier Domain Mode-Locked Lasers}, 
  year={2022},
  volume={},
  number={},
  pages={67-68},
  doi={10.1109/NUSOD54938.2022.9894816}}

2021

Michael Münter, Mario Pieper, Tabea Kohlfaerber, Ernst Bodenstorfer, Martin Ahrens, Christian Winter, Robert Huber, Peter König, Gereon Hüttmann, and Hinnerk Schulz-Hildebrandt,
Microscopic optical coherence tomography (mOCT) at 600 kHz for 4D volumetric imaging and dynamic contrast, Biomed. Opt. Express , vol. 12, pp. 6024-6039, 2021.
DOI:10.1364/BOE.425001
Bibtex: BibTeX
@article{Münter2021,
   author = {M. Münter, M. Pieper, T. Kohlfaerber, E. Bodenstorfer, M. Ahrens, C. Winter, R. Huber, P. König, G. Hüttmann and H. Schulz-Hildebrandt},
   title = {Microscopic optical coherence tomography (mOCT) at 600 kHz for 4D volumetric imaging and dynamic contrast},
   journal = {BiomedOptE},
   volume = {12(10)},
   Keywords = {CMOS cameras,Full field optical coherence tomography,High numerical aperture optics, Image processing,In vivo imaging,Medical imaging,Ag-Huber},
   pages = {6024-6039},
   DOI = {10.1364/BOE.425001},
  
   year = {2021},
   type = {Journal Article}
}
Dirk Theisen-Kunde, Wolfgang Draxinger, Matteo M. Bonsanto, Paul Strenge, Nicolas Detrez, Robert Huber, and Ralf Brinkmann,
1.6 MHz FDML OCT for Intraoperative Imaging in Neurosurgery, in European Conferences on Biomedical Optics 2021 (ECBO) , Optica Publishing Group, 2021. pp. ETu4A.2.
Weblink: https://opg.optica.org/abstract.cfm?URI=ECBO-2021-ETu4A.2
Datei: abstract.cfm
Bibtex: BibTeX
@inproceedings{Theisen-Kunde:21,
author = {D. Theisen-Kunde and W. Draxinger and M. M. Bonsanto and Paul Strenge and Nicolas Detrez and R. Huber and R. Brinkmann},
booktitle = {European Conferences on Biomedical Optics 2021 (ECBO)},
journal = {European Conferences on Biomedical Optics 2021 (ECBO)},
keywords = {Clinical applications; Fourier domain mode locking; Optical coherence tomography; Optical fibers; Three dimensional reconstruction; White light},
pages = {ETu4A.2},
publisher = {Optica Publishing Group},
title = {1.6 MHz FDML OCT for Intraoperative Imaging in Neurosurgery},
year = {2021},
url = {https://opg.optica.org/abstract.cfm?URI=ECBO-2021-ETu4A.2},
doi = {10.1364/ECBO.2021.ETu4A.2},
abstract = {A 1.6 MHz Fourier-domain mode-locked (FDML) optical coherence tomography (OCT) was adapted to an OR-Microscope for clinical application in neurosurgery. 3D-volume scans at video rate are envisaged with approximately 50{\textmu}m lateral and 20{\textmu}m axial resolution.},
}
Tom Pfeiffer, Thomas Klein, Alexander Mlynek, Wolfgang Wieser, Simon Lotz, Christin Grill, and Robert Huber,
High finesse tunable Fabry-Perot filters in Fourier-domain modelocked lasers, in Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV , Joseph A. Izatt and James G. Fujimoto, Eds. SPIE, Jun.2021.
DOI:10.1117/12.2583501
Bibtex: BibTeX
@inproceedings{Pfeiffer2021,
author = {T. Pfeiffer, T. Klein, A. Mlynek, W. Wieser, S. Lotz, C. Grill and R. Huber},
title = {{High finesse tunable Fabry-Perot filters in Fourier-domain modelocked lasers}},
volume = {11630},
booktitle = {Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV},
editor = {Joseph A. Izatt and James G. Fujimoto},
organization = {International Society for Optics and Photonics},
publisher = {SPIE},
abstract = {We demonstrate that the coherence roll-off and dynamic range of OCT systems using Fourier-domain mode-locked (FDML) lasers can be significantly improved by a fiber Fabry-Perot tunable filter (FFP-TF) with a finesse of more than 3000, a more than fivefold improvement over previous designs. In contrast to previous work, standard resampling using a pre-acquired signal (as in SD-OCT) with no k-clocking is sufficient for 20 nm and 100 nm sweep range, significantly reducing the system complexity. 3D-OCT imaging at 20 cm imaging range is demonstrated.},
keywords = {AG-Huber_FDML, AG-Huber_OCT, optical coherence tomography, FDML laser, swept source laser, high finesse, Fabry-Perot, MHz-OCT, OCT, tunable laser},
year = {2021},
URL = {hhttps://doi.org/10.1117/12.2583501}
}
Matthias Strauch, Jan Philip Kolb, Wolfgang Draxinger, Ann-Kathrin Popp, Melanie Wacker, Nadine Merg, Jennifer Hundt, Sebastian Karpf, and Robert Huber,
Sectioning-free virtual H&E histology with fiber-based two-photon microscopy, in SPIE BiOS , SPIE, Mä.2021.
DOI:10.1117/12.2578334
Bibtex: BibTeX
@inproceedings{RN5318,
   author = {Strauch, M;Kolb, J P;Draxinger, W;Popp, A-K;Wacker, M;Merg, N;Hundt, J;Karpf, S and Huber, R},
   title = {Sectioning-free virtual H&E histology with fiber-based two-photon microscopy},
   booktitle = {SPIE BiOS},
   publisher = {SPIE},
   volume = {11648},
Year = {2021},
   DOI = {https://doi.org/10.1117/12.2578334},
   url = {https://doi.org/10.1117/12.2578334},
   type = {Conference Proceedings}
}
Paul Strenge, Birgit Lange, Christin Grill, Wolfgang Draxinger, Veit Danicke, Dirk Theisen-Kunde, Heinz Handels, Christian Hagel, Matteo M. Bonsanto, Robert Huber, and Ralf Brinkmann,
Creating a depth-resolved OCT-dataset for supervised classification based on ex vivo human brain samples, in Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV , SPIE, Mä.2021. pp. 66 -- 73.
DOI:10.1117/12.2578391
Bibtex: BibTeX
@inproceedings{Strenge2021,
author = {P. Strenge, B. Lange, C. Grill, W. Draxinger, V. Danicke, D. Theisen-Kunde, H. Handels, C. Hagel, M. Bonsanto, R. Huber and R. Brinkmann},
title = {{Creating a depth-resolved OCT-dataset for supervised classification based on ex vivo human brain samples}},
volume = {11630},
booktitle = {Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV},
editor = {Joseph A. Izatt and James G. Fujimoto},
organization = {International Society for Optics and Photonics},
publisher = {SPIE},
pages = {66 -- 73},
abstract = {Optical coherence tomography (OCT) has the potential to become an additional imaging modality for surgical guidance in the field of neurosurgery, especially when it comes to the detection of different infiltration grades of glioblastoma multiforme at the tumor border. Interpretation of the images, however, is still a big challenge. A method to create a labeled OCT dataset based on ex vivo brain samples is introduced. The tissue samples were embedded in an agarose mold giving them a distinctive shape before images were acquired with two OCT systems (spectral domain (SD) and swept source (SS) OCT) and histological sections were created and segmented by a neuropathologist. Based on the given shape, the corresponding OCT images for each histological image can be determined. The transfer of the labels from the histological images onto the OCT images was done with a non-affine image registration approach based on the tissue shape. It was demonstrated that finding OCT images of a tissue sample corresponding to segmented histological images without any color or laser marking is possible. It was also shown that the set labels can be transferred onto OCT images. The accuracy of method is 26 ± 11 pixel, which translates to 192 ± 75 μm for the SS-OCT and 94 ± 43 μm for the SD-OCT. The dataset consists of several hundred labeled OCT images, which can be used to train a classification algorithm.},
keywords = {AG-Huber_OCT, optical coherence tomography, OCT, image registration, glioblastoma multiforme, MHz-OCT, brain imaging, tumor, neurosurgery},
year = {2021},
URL = {https://doi.org/10.1117/12.2578391}
}
Simon Lotz, Christin Grill, Madita Göb, Wolfgang Draxinger, Jan Philip Kolb, and Robert Huber,
Characterization of the dynamics of an FDML laser during closed-loop cavity length control, in Fiber Lasers XVIII: Technology and Systems , Michalis N. Zervas, Eds. SPIE, 2021. pp. 236 -- 241.
DOI:10.1117/12.2578514
Bibtex: BibTeX
@inproceedings{LotzLASE2021,
author = {S. Lotz, C. Grill, M. Göb, W. Draxinger, J. P. Kolb and R. Huber},
title = {{Characterization of the dynamics of an FDML laser during closed-loop cavity length control}},
volume = {11665},
booktitle = {Fiber Lasers XVIII: Technology and Systems},
editor = {Michalis N. Zervas},
organization = {International Society for Optics and Photonics},
publisher = {SPIE},
pages = {236 -- 241},
abstract = {In Fourier domain mode locked (FDML) lasers, extremely precise and stable matching of the filter tuning period and light circulation time in the cavity is essential for ultra-low noise operation. During the operation of FDML lasers, the ultra-low noise mode can be lost due to temperature drifts of the already temperature stabilized cavity resulting in increased intensity noise. Until now, the filter frequency is continuously regulated to match the changing light circulation time. However, this causes the filter frequency to constantly change by a few mHz and leads to synchronization issues in cases where a fixed filter frequency is desired. We present an actively cavity length controlled FDML laser and a robust and high precision feedback loop algorithm for maintaining ultra-low noise operation. Instead of adapting the filter frequency, the cavity length is adjusted by a motorized free space beam path to match the fixed filter frequency. The closed-loop system achieves a stability of ~0.18 mHz at a sweep repetition rate of ~418 kHz which corresponds to a ratio of 4×10<sup>-10</sup>. We investigate the coherence properties during the active cavity length adjustments and observe no noise increase compared to fixed cavity length. The cavity length control is fully functional and for the first time, offers the possibility to operate an FDML laser in sweet spot mode at a fixed frequency or phase locked to an external clock. This opens new possibilities for system integration of FDML lasers.},
keywords = {AG-Huber_FDML, FDML, Fourier domain mode locking, laser beating, tunable laser, optical coherence tomography, OCT},
year = {2021},
URL = {hhttps://doi.org/10.1117/12.2578514}
}
Paul Strenge, Birgit Lange, Wolfgang Draxinger, Veit Danicke, Dirk Theisen-Kunde, Heinz Handels, Matteo M. Bonsanto, Christian Hagel, Robert Huber, and Ralf Brinkmann,
Characterization of brain tumor tissue with 1310 nm optical coherence tomography, in Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV , Joseph A. Izatt and James G. Fujimoto, Eds. SPIE, Mä.2021. pp. 74 -- 80.
DOI:10.1117/12.2578409
Bibtex: BibTeX
@inproceedings{Strenge2021A,
author = {P. Strenge, B. Lange, C. Grill, W. Draxinger, V. Danicke, D. Theisen-Kunde, H. Handels, M. Bonsanto, C. Hagel, R. Huber and R. Brinkmann},
title = {{Characterization of brain tumor tissue with 1310 nm optical coherence tomography}},
volume = {11630},
booktitle = {Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXV},
editor = {Joseph A. Izatt and James G. Fujimoto},
organization = {International Society for Optics and Photonics},
publisher = {SPIE},
pages = {74 -- 80},
abstract = {The separation of tumorous brain tissue and healthy brain tissue is still a big challenge in the field of neurosurgery, especially when it comes to the detection of different infiltration grades of glioblastoma multiforme at the tumor border. On the basis of a recently created labelled OCT dataset of ex vivo glioblastoma multiforme tumor samples the detection of brain tumor tissue and the identification of zones with varying degrees of infiltration of tumor cells was investigated. The identification was based on the optical properties, which were extracted by an exponential fit function. The results showed that a separation of tumorous tissue and healthy white matter based on these optical properties is possible. A support vector machine was trained on the optical properties to separate tumor from healthy white matter tissue, which achieved a sensitivity of 91% and a specificity of 76% on an independent training dataset.},
keywords = {AG-Huber_OCT, optical coherence tomography, OCT, glioblastoma multiforme, MHz-OCT, brain imaging, tumor, neurosurgery},
year = {2021},
URL = {hhttps://doi.org/10.1117/12.2578409}
}
Christin Grill, Torben Blömker, Mark Schmidt, Dominic Kastner, Tom Pfeiffer, Jan Philip Kolb, Wolfgang Draxinger, Sebastian Karpf, Christian Jirauschek, and Robert Huber,
A detailed analysis of the coherence and field properties of an FDML laser by time resolved beat signal measurements, in Fiber Lasers XVIII: Technology and Systems , Michalis N. Zervas, Eds. SPIE, Mä.2021. pp. 242 -- 247.
DOI:10.1117/12.2578293
Bibtex: BibTeX
@inproceedings{Grill2021,
author = {C. Grill, T. Blömker, M. Schmidt, D. Kastner, T. Pfeiffer, J.P. Kolb, W. Draxinger, S. Karpf, C. Jirauschek and R. Huber},
title = {{A detailed analysis of the coherence and field properties of an FDML laser by time resolved beat signal measurements}},
volume = {11665},
booktitle = {Fiber Lasers XVIII: Technology and Systems},
editor = {Michalis N. Zervas},
organization = {International Society for Optics and Photonics},
publisher = {SPIE},
pages = {242 -- 247},
keywords = {AG-Huber_FDML, Fourier domain mode locking, FDML laser, laser beating , tunable laser, optical coherence tomography, OCT},
year = {2021},
URL = {hhttps://doi.org/10.1117/12.2578293}
}
Paul Strenge, Birgit Lange, Christin Grill, Wolfgang Draxinger, Veit Danicke, Dirk Theisen-Kunde, Heinz Handels, Matteo M. Bonsanto, Christian Hagel, Robert Huber, and Ralf Brinkmann,
Comparison of two optical coherence tomography systems to identify human brain tumor, Optical Society of America, Dez.2021. pp. EW1C.7.
DOI:10.1117/12.2616044
Bibtex: BibTeX
@inproceedings{Strenge:21,
author = {P. Strenge, B. Lange, C. Grill, W. Draxinger, V. Danicke, D. Theisen-Kunde, H. Handels, M. M. Bonsanto, C. Hagel, R. Huber and R. Brinkmann},
journal = {European Conferences on Biomedical Optics 2021 (ECBO)},
keywords = {AG-Huber_OCT; Absorption coefficient; Attenuation coefficient; Fourier domain mode locking; Multiple scattering; Optical coherence tomography; Spectral domain optical coherence tomography},
pages = {EW1C.7},
publisher = {Optical Society of America},
title = {Comparison of two optical coherence tomography systems to identify human brain tumor},
year = {2021},
url = {https://doi.org/10.1117/12.2616044},
abstract = {The identification of ex vivo brain tumor tissue was investigated with two different optical coherence tomography systems exploiting two optical parameters. The optical parameters were calculated from semantically labelled OCT B-scans.},
}
Matthias Strauch, Jan Philip Kolb, Christian Rose, Nadine Merg, Jennifer Hundt, Christiane Kümpers, Sven Perner, Sebastian Karpf, and Robert Huber,
Quick sectioning-free H&E imaging of bulk tissue using multiphoton microscopy, in 33rd Congress of the ESP , 2021.
DOI:10.1007/s00428-021-03157-8
Bibtex: BibTeX
@Conference{Strauch2021,
  author    = {M. Strauch, J.P. Kolb, C. Rose, N. Merg, J. Hundt, C. Kümpers, S. Perner, S. Karpf and R. Huber},
  booktitle = {33rd Congress of the ESP},
  title     = {Quick sectioning-free H&E imaging of bulk tissue using multiphoton microscopy},
  year      = {2021},
  keywords  = {AG-Huber_NL},
}
Matthias Strauch, Jan Philip Kolb, Christian Rose, Nadine Merg, Christiane Kümpers, Sven Perner, Jennifer Hundt, Sebastian Karpf, and Robert Huber,
Comparison of Sectioning-free Multiphoton Histology to H&E FFPE imaging, in Virtuelle Pathologietage , 2021.
Bibtex: BibTeX
@Conference{Strauch2021b,
  author    = {M. Strauch, J.P. Kolb, C. Rose, N. Merg, J. Hundt, C. Kümpers, S. Perner, S. Karpf and R. Hubert},
  booktitle = {Virtuelle Pathologietage},
  title     = {Comparison of Sectioning-free Multiphoton Histology to H&E FFPE imaging},
  year      = {2021},
  keywords  = {AG-Huber_NL},
}
Philipp Lamminger, Merle Loop, Julian Klee, Daniel Weng, Jan Philip Kolb, Matthias Strauch, Sebastian Karpf, and Robert Huber,
Combination of two-photon microscopy and optical coherence tomography with fully fiber-based lasers for future endoscopic setups, in Multimodal Biomedical Imaging XVI , SPIE, Mä.2021.
DOI:10.1117/12.2578679
Bibtex: BibTeX
@Conference{Lamminger2021,
  author    = {P. Lamminger, M. Loop, J. Klee, D. Weng, J.P. Kolb, M. Strauch, S. Karpf and R. Huber},
  booktitle = {Multimodal Biomedical Imaging XVI},
  title     = {Combination of two-photon microscopy and optical coherence tomography with fully fiber-based lasers for future endoscopic setups},
  year      = {2021},
  publisher = {SPIE},
  doi       = {10.1117/12.2578679},
  keywords  = {AG-Huber_NL, AG-Huber_OCT},
}
Mark Schmidt, Christin Grill, Simon Lotz, Tom Pfeiffer, Robert Huber, and Christian Jirauschek,
Intensity pattern types in broadband Fourier domain mode-locked (FDML) lasers operating beyond the ultra-stable regime, Applied Physics B , vol. 127, no. 5, pp. 60, Feb. 2021.
DOI:10.1007/s00340-021-07600-1
Bibtex: BibTeX
@Article{Schmidt2021,
  author   = {M. Schmidt, C. Grill, S. Lotz, T. Pfeiffer, R. Hubert and C. Jirauschek},
  journal  = {Applied Physics B},
  title    = {Intensity pattern types in broadband Fourier domain mode-locked (FDML) lasers operating beyond the ultra-stable regime},
  year     = {2021},
  issn     = {1432-0649},
  number   = {5},
  pages    = {60},
  volume   = {127},
keywords={AG-Huber_FDML},
  abstract = {We report on the formation of various intensity pattern types in detuned Fourier domain mode-locked (FDML) lasers and identify the corresponding operating conditions. Such patterns are a result of the complex laser dynamics and serve as an ideal tool for the study of the underlying physical processes as well as for model verification. By numerical simulation we deduce that the formation of patterns is related to the spectral position of the instantaneous laser lineshape with respect to the transmission window of the swept bandpass filter. The spectral properties of the lineshape are determined by a long-term accumulation of phase-offsets, resulting in rapid high-amplitude intensity fluctuations in the time domain due to the narrow intra-cavity bandpass filter and the fast response time of the semiconductor optical amplifier gain medium. Furthermore, we present the distribution of the duration of dips in the intensity trace by running the laser in the regime in which dominantly dips form, and give insight into their evolution over a large number of roundtrips.},
  doi      = {10.1007/s00340-021-07600-1},
  refid    = {Schmidt2021},
}
Thomas Gottschall, Tobias Meyer-Zedler, Michael Schmitt, Robert Huber, Jürgen Popp, Andreas Tünnermann, and Jens Limpert,
Ultra-compact tunable fiber laser for coherent anti-Stokes Raman imaging, JRS , Jun. 2021.
DOI:10.1002/jrs.6171
Bibtex: BibTeX
@article{Gottschall2021,
   author = {T. Gottschall, T. Meyer-Zedler, M. Schmitt, R. Huber, J. Popp, A. Tünnermann and J. Limpert},
   title = {Ultra-compact tunable fiber laser for coherent anti-Stokes Raman imaging},
   journal = {JRS},
  keywords = { AG-Huber_NL, coherent anti-Stokes Raman scattering microscopy, four-wave mixing, nonlinear
microscopy, ultrafast laser},
   ISSN = {0377-0486},   
   url = {https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/abs/10.1002/jrs.6171},
   year = {2021},
   type = {Journal Article}
}
Simon Lotz, Christin Grill, Madita Göb, Wolfgang Draxinger, Jan Philip Kolb, and Robert Huber,
Cavity length control for Fourier domain mode locked (FDML) lasers with µm precision, Biomedical Optics Express , vol. 12(5), pp. 2604-2616, Mä. 2021.
DOI:10.1364/BOE.422898
Bibtex: BibTeX
@article{Lotz2021,
   author = {S. Lotz, C. Grill, M. Göb, W. Draxinger, J.P. Kolb and R. Huber},
   title = {Cavity length control for Fourier domain mode locked (FDML) lasers with µm precision},
   journal = {Biomedical Optics Express},
   volume = {12(5)},
   keywords={AG-Huber_FDML},
   pages = {2604-2616},
   url = {https://doi.org/10.1364/BOE.422898},
   year = {2021},
   type = {Journal Article}
}
Katharina Rewerts, Moritz Matthiae, Nicolas Detrez, Steffen Buschschlüter, Matteo M. Bonsanto, Robert Huber, and Ralf Brinkmann,
Phase-Sensitive Optical Coherence Elastography with a 3.2 MHz FDML-Laser Using Focused Air-Puff Tissue Indentation, in ECBO , Optical Society of America, Dez.2021. pp. ETh3A.3.
Weblink: https://opg.optica.org/abstract.cfm?URI=ECBO-2021-ETh3A.3
Bibtex: BibTeX
@inproceedings{Rewerts2021ECBO,
author = {K. Rewerts, M. Matthiae, N. Detrez, S. Buschschlueter, M.M. Bonsanto, R. Huber and R. Brinkmann},
journal = {European Conferences on Biomedical Optics 2021 (ECBO)},
keywords = {AG-Huber_OCT},
pages = {ETh3A.3},
publisher = {Optical Society of America},
title = {Phase-Sensitive Optical Coherence Elastography with a 3.2 MHz FDML-Laser Using Focused Air-Puff Tissue Indentation},
year = {2021},
url = {http://www.osapublishing.org/abstract.cfm?URI=ECBO-2021-ETh3A.3},
abstract = {Tumor discrimination from healthy tissue is often performed by haptically probing tissue elasticity. We demonstrate non-contact elastography using air-puff excitation and tissue indentation measurement by phase-sensitive OCT with a 3.2 MHz FDML-laser.},
}
Tuula Peñate Medina, Jan Philip Kolb, Gereon Hüttmann, Robert Huber, Oula Peñate Medina, Naomi Larsen, Arianna Ferrari, Magdalena Rafecas, Mark Ellrichmann, Mariya S. Pravdivtseva, Mariia Anikeeva, Jana Humbert, Marcus Both, Jennifer Hundt, and Jan-Bernd Hövener,
Imaging Inflammation - From Whole Body Imaging to Cellular Resolution, Frontiers in immunology , vol. 12, pp. 692222-692222, Jun. 2021.
DOI:10.3389/fimmu.2021.692222
Bibtex: BibTeX
@article{PenateMedina2021,
   author = {Peñate Medina, T;Kolb, J P;Hüttmann, G;Huber, R;Peñate Medina, O;Ha, L;Ulloa, P;Larsen, N;Ferrari, A;Rafecas, M;Ellrichmann, M;Pravdivtseva, M S.;Anikeeva, M;Humbert, J;Both, M;Hundt, J E. and Hövener, J-B},
   title = {Imaging Inflammation - From Whole Body Imaging to Cellular Resolution},
   journal = {Frontiers in immunology},
keywords = {AG-Huber, MRI, PET, SPECT, optical imaging, Optical coherence tomography (OCT), precision medicine, Two-Photon microscopy (TPM), hyperpolarization},
   volume = {12},
   pages = {692222-692222},
   ISSN = {1664-3224},
   DOI = {10.3389/fimmu.2021.692222},
   url = {https://pubmed.ncbi.nlm.nih.gov/34248987
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8264453/},
   year = {2021},
   type = {Journal Article}
}
Hubertus Hakert, Matthias Eibl, Marie Tillich, Ralph Pries, Gereon Hüttmann, Ralf Brinkmann, Barbara Wollenberg, Ludwig Bruchhage, Sebastian Karpf, and Robert Huber,
Time-encoded stimulated Raman scattering microscopy of tumorous human pharynx tissue in the fingerprint region from 1500–1800  cm-1, Optics Letters , vol. 46(14), no. 14, pp. 3456-3459, Jul. 2021.
DOI:10.1364/OL.424726
Bibtex: BibTeX
@article{Hakert2021,
   author = {H. Hakert, M. Eibl, M. Tillich, R.Pries, G. Hüttmann, R. Brinkmann, B. Wollenberg, K-L. Bruchhage, S. Karpf and R. Huber},
   title = {Time-encoded stimulated Raman scattering microscopy of tumorous human pharynx tissue in the fingerprint region from 1500–1800  cm-1},
   journal = {Optics Letters},
   volume = {46(14)},
   number = {14},
   pages = {3456-3459},
keywords = {AG-Huber_NL, Clinical applications, Master oscillator power amplifiers, Optical coherence tomography, Raman scattering, Stimulated Raman scattering, Stimulated scattering},
   DOI = {https://doi.org/10.1364/OL.424726},
   year = {2021},
   type = {Journal Article}
}