Dr. Martin Forrer Profile

Dr. Martin Forrer

Senior VP Business Development at FISBA AG

SPIE Involvement:

Conference Program Committee | Author

Publications (26)

Proceedings Article | 1 April 2022 Presentation

Precision molded laser-line generators

Rita Schlaginhaufen, Bernd Granzin, Aline Dotta, Hans Forrer, Martin Forrer, Eckhard Langenbach, Andreas Kunz

Proceedings Volume PC11982, PC1198207 (2022) https://doi.org/10.1117/12.2610733

KEYWORDS: Lenses, Testing and analysis, Light sources

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Proceedings Article | 12 September 2021 Presentation + Paper

Optical design of a variable beam angle fiber light source

Marcel Wäspi, Henning Rehn, Tobias Honig, Martin Forrer

Proceedings Volume 11874, 118740C (2021) https://doi.org/10.1117/12.2599880

KEYWORDS: Zoom lenses, Optical design, Light sources, Light emitting diodes, Endoscopes, Lenses, Collimators, Light, Collimation, Endoscopy

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Proceedings Article | 5 March 2021 Presentation + Paper

Collimation performance measurement of FAC lenses by active and automated alignment

V. Lendenmann, H. Moser, H. Forrer, M. Forrer, B. Rusconi, P. Wüst, A. Kunz

Proceedings Volume 11667, 1166705 (2021) https://doi.org/10.1117/12.2579175

KEYWORDS: Antireflective coatings, Absorption, Silica, Visualization, Collimation, Coating

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Proceedings Article | 21 February 2020 Paper

High precision automated tab assembly with micro optics for optimized high-power diode laser collimation

C. Brecher, M. Hoeren, D. Zontar, T. Honig, M. Forrer, A. Kunz, H. Strub, H. Moser, N. Koller

Proceedings Volume 11261, 112610B (2020) https://doi.org/10.1117/12.2543738

KEYWORDS: Semiconductor lasers, Micro optics, Tolerancing, Assembly tolerances, Collimation, High power lasers, Control systems, Laser bonding, Active optics, Optical alignment, High power diode lasers

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Proceedings Article | 4 March 2019 Paper

Fused silica fast axis collimator lens for blue high-power laser diodes

M. Forrer, P. Wuest, H. Moser, H. Forrer, M. Huber, F. Saupe

Proceedings Volume 10899, 108990C (2019) https://doi.org/10.1117/12.2508566

KEYWORDS: Silica, Finite element methods, Absorption, Glasses, High power lasers, Semiconductor lasers, Temperature metrology, Refractive index, Collimators, Diodes

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Proceedings Article | 22 February 2017 Presentation + Paper

Collimation optics for high power blue laser diodes

P. Wuest, H. Forrer, M. Huber, H. Moser, M. Forrer

Proceedings Volume 10085, 100850B (2017) https://doi.org/10.1117/12.2252932

KEYWORDS: Collimation, Semiconductor lasers, High power lasers, Collimators, Diodes, Glasses, Refractive index, Packaging, Beam shaping, Infrared radiation, Freeform optics, Optical simulations, Optical testing, Photonics

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Proceedings Article | 22 April 2016 Paper

Engineering of freeform refractive and reflective slow axis collimation solutions

H. Moser, H. Forrer, D. Kura, R. Schlaginhaufen, M. Huber, M. Forrer

Proceedings Volume 9730, 97300Z (2016) https://doi.org/10.1117/12.2213370

KEYWORDS: Collimation, Reflectivity, High power diode lasers, Optical design, Semiconductor lasers, Spherical lenses, High power lasers, Micro optics, Beam shaping, Standards development, Optical simulations, Reflection, Computer simulations, Glasses, Fiber couplers, Mirrors

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Proceedings Article | 20 February 2015 Paper

Beam vignetting effect in micro-optic collimation and transmission for high power diode laser arrays

M. Forrer, H. Moser, D. Kura, H. Forrer, S. Mourad, M. Schmidlin, M. Huber

Proceedings Volume 9346, 934602 (2015) https://doi.org/10.1117/12.2077415

KEYWORDS: Vignetting, Telescopes, Micro optics, Semiconductor lasers, Collimation, Refractive index, Monte Carlo methods, Optical design, Optical instrument design, High power diode lasers

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Proceedings Article | 20 February 2014 Paper

Industrial performance analysis of the fast axis collimator

M. Grössl, M. Forrer, H. Moser, D. Kura, H. Forrer

Proceedings Volume 8963, 89630D (2014) https://doi.org/10.1117/12.2038067

KEYWORDS: Semiconductor lasers, Collimation, Refractive index, Aspheric lenses, Collimators, Surface roughness, Glasses, Optical design, Antireflective coatings, Coating

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Proceedings Article | 15 October 2013 Paper

Interaction of N-FK5 and L-BAL35 optical glass with various carbide and other precision glass mold tooling

E. Koontz, P. Wachtel, J. David Musgraves, K. Richardson, S. Mourad, A. Kunz, M. Huber, M. Forrer

Proceedings Volume 8884, 88841Y (2013) https://doi.org/10.1117/12.2035217

KEYWORDS: Glasses, Silicon carbide, Glass molding, Scanning electron microscopy, Contamination, Potassium, Reflectivity, Precision glass molding, Tungsten, Chemical vapor deposition

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Proceedings Article | 12 March 2013 Paper

Top hat beam shaping for a high power laser diode bar with a wavelength of 780 – 1100 nm

H. Moser, D. Kura, M. Forrer, H. Forrer

Proceedings Volume 8600, 860012 (2013) https://doi.org/10.1117/12.2002043

KEYWORDS: Semiconductor lasers, Beam shaping, Collimation, High power lasers, Laser beam propagation, Diodes, Micro optics, Tolerancing, Gaussian beams, High power diode lasers

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Proceedings Article | 21 February 2011 Paper

Bright laser source with high-power single-mode-emitting diode laser stacked array assembly and fiber coupling

M. Krejci, T. Gisler, C. Bosshard, J. Pierer, M. Forrer, H. Moser, G. Spinola Durante, N. Lichtenstein

Proceedings Volume 7918, 79180Q (2011) https://doi.org/10.1117/12.875164

KEYWORDS: Glasses, Semiconductor lasers, Collimation, Laser welding, Micro optics, Fiber couplers, High power lasers, Fiber coupled lasers, Laser processing, Laser development

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Proceedings Article | 18 February 2010 Paper

Micro-optic solutions for beam shaping of individually addressable high-power single-mode diode laser arrays

E. Langenbach, M. Forrer, D. Kura

Proceedings Volume 7583, 75830D (2010) https://doi.org/10.1117/12.842320

KEYWORDS: Beam shaping, Micro optics, Semiconductor lasers, High power lasers, Free space, High power diode lasers, Assembly tolerances, Glasses, Chemical elements, Plano

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Proceedings Article | 13 May 2002 Paper

In-vivo fluorescence spectroscopy to optimize the detection of early bronchial carcinoma by autoflourescene imaging

Hubert van den Bergh, Didier Goujon, Matthieu Zellweger, Philippe Monnier, Ramiro Conde, Martin Forrer, Georges Wagnieres, Pierre Grosjean

Proceedings Volume 4615, (2002) https://doi.org/10.1117/12.466647

KEYWORDS: Tissues, Luminescence, Optical fibers, Imaging systems, In vivo imaging, Fluorescence spectroscopy, Photodetectors, Biopsy, Lamps, Optical filters

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Proceedings Article | 22 May 1997 Paper

Fluorescence photodetection of urothelial neoplastic foci in superficial bladder cancer

Franz Schmidlin, Georges Wagnieres, Martin Forrer, Patrice Jichlinski, Daniel Braichotte, Georges Zimmer, Hans-Juerg Leisinger, Jerome Mizeret, Louis Guillou, Hubert van den Bergh, Peter Graber

Proceedings Volume 2970, (1997) https://doi.org/10.1117/12.275078

KEYWORDS: Luminescence, Tumors, Bladder, Bladder cancer, Cystoscopy, Photodetectors, Cancer, Biopsy, Cell biology, Fluorescence spectroscopy

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Proceedings Article | 17 May 1996 Paper

Usefulness of fluorescence photodetection of neoplastic urothelial foci in bladder cancer following intravesical instillation of delta-aminolevulinic acid (5-ALA)

Martin Forrer, Hans-Juerg Leisinger, Patrice Jichlinski, Louis Guillou, Daniel Braichotte, Hubert van den Bergh, Franz Schmidlin, Peter Graber, Jerome Mizeret, Georges Zimmer, Georges Wagnieres

Proceedings Volume 2671, (1996) https://doi.org/10.1117/12.240028

KEYWORDS: Luminescence, Bladder, Bladder cancer, Photodetectors, Tumors, Biopsy, Xenon, Endoscopy, Krypton ion lasers, Fluorescence spectroscopy

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Proceedings Article | 27 December 1995 Paper

In-vivo measurement of fluorescence bleaching of meso-tetra hydroxy phenyl chlorin (mTHPC) in the esophagus and the oral cavity

Daniel Braichotte, Hubert van den Bergh, Philippe Monnier, Martin Forrer, Thomas Glanzmann, Jean-Francois Savary, Georges Wagnieres

Proceedings Volume 2627, (1995) https://doi.org/10.1117/12.228901

KEYWORDS: Luminescence, Tissue optics, Photodynamic therapy, Natural surfaces, Esophagus, Tissues, In vivo imaging, Oxygen, Differential equations

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Proceedings Article | 1 March 1995 Paper

Comparison of the influence of a water-soluble polymer carrier on the tumor localization and biodistribution of mesotetrametahydroxyphenylchlorin (mTHPC) in two animal models

Hubert van den Bergh, Philippe Monnier, Daniel Braichotte, P. Westermann, Martin Forrer, J.-P. Mach, S. Folli, Thomas Glanzmann, Snezana Andrejevic-Blant

Proceedings Volume 2371, (1995) https://doi.org/10.1117/12.203361

KEYWORDS: Tumors, Tumor growth modeling, Animal model studies, Polymers, Tissues, Magnesium

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Proceedings Article | 1 March 1995 Paper

Fluorescence imaging photodetection of early cancer in the bronchi with mTHPC and in the bladder with ALA-induced protoporphyrin IX: preliminary clinical results

Philippe Monnier, Jean-Francois Savary, Martin Forrer, Patrice Jichlinski, Daniel Braichotte, Jerome Mizeret, Hans-Juerg Leisinger, Georges Wagnieres, Hubert van den Bergh

Proceedings Volume 2371, (1995) https://doi.org/10.1117/12.203434

KEYWORDS: Luminescence, Photodetectors, Cancer, Bladder, Bladder cancer, Fluorescence spectroscopy, Photodynamic therapy

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Proceedings Article | 1 March 1995 Paper

Evaluation with mTHPC of early squamous cell carcinomas of the cheek pouch mucosa of Golden Syrian hamsters as a model for clinical PDT of early cancers in the upper aerodigestive tract, the esophag

Jean-Francois Theumann, Georges Wagnieres, Snezana Andrejevic-Blant, Thomas Glanzmann, Philippe Monnier, Martin Forrer, Hubert van den Bergh, Daniel Braichotte, Jean-Francois Savary

Proceedings Volume 2371, (1995) https://doi.org/10.1117/12.203366

KEYWORDS: Photodynamic therapy, Tumor growth modeling, Animal model studies, Tumors, Cancer, Laser induced fluorescence, Luminescence, Photodetectors, Phototherapy, Esophagus

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Proceedings Article | 4 January 1995 Paper

Fluorescence excitation and emission spectra of ALA-induced protoporphyrin IX in normal and tumoral tissue of the human bladder

Hubert van den Bergh, Jerome Mizeret, Martin Forrer, Patrice Jichlinski, Hans-Juerg Leisinger, Daniel Braichotte, Georges Wagnieres, Thomas Glanzmann

Proceedings Volume 2324, (1995) https://doi.org/10.1117/12.198705

KEYWORDS: Luminescence, Tumors, Tissues, Tissue optics, Photodetectors, Bladder, Biopsy, Spectrographs, Charge-coupled devices, Fluorescence spectroscopy

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Proceedings Article | 4 January 1995 Paper

Pharmacokinetics of meso-(tetrahydroxyphenyl)chlorin (m-THPC) studied by fluorescence spectroscopy on early cancer of the cheek pouch mucosa of Golden Syrian hamsters

Hubert van den Bergh, Snezana Andrejevic-Blant, Georges Wagnieres, Jean-Francois Savary, Thomas Glanzmann, Martin Forrer, Daniel Braichotte, Jean-Francois Theumann, Philippe Monnier

Proceedings Volume 2324, (1995) https://doi.org/10.1117/12.198706

KEYWORDS: Luminescence, Tumors, Tissues, Photodynamic therapy, Tumor growth modeling, Skin, Animal model studies, Tissue optics, Cancer, Aluminum

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Proceedings Article | 3 January 1995 Paper

Light distributors for photodynamic therapy

Jerome Mizeret, D. Robert, J. Philippoz, Philippe Monnier, Roland Bays, Jean-Francois Savary, Jean-Francois Theumann, Georges Wagnieres, P. Thielen, Alain Woodtli, Martin Forrer, Hubert van den Bergh, Daniel Braichotte

Proceedings Volume 2631, (1995) https://doi.org/10.1117/12.229182

KEYWORDS: Photodynamic therapy, Esophagus, Luminescence, Tissue optics, Mirrors, Light scattering, Natural surfaces, Particles, Optical fibers

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Proceedings Article | 1 February 1994 Paper

Mechanism of channel propagation in water by pulsed erbium laser radiation

Martin Frenz, Vitali Konov, Heinz Weber, Martin Forrer, Alexander Silenok, Valerio Romano, Michael Ith

Proceedings Volume 2077, (1994) https://doi.org/10.1117/12.168053

KEYWORDS: Liquids, Erbium lasers, Pulsed laser operation, Tissues, Laser beam propagation, Wave propagation, Data modeling, Laser ablation, Phase velocity, Phase measurement

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Proceedings Article | 1 June 1991 Paper

Damage induced by pulsed IR laser radiation at transitions between different tissues

Heinz Weber, Valerio Romano, Martin Frenz, Charlotte Greber, Martin Forrer

Proceedings Volume 1427, (1991) https://doi.org/10.1117/12.44084

KEYWORDS: Tissues, Skin, Pulsed laser operation, Connective tissue, Laser cutting, Laser tissue interaction, Laser drilling, Carbon dioxide lasers, Composites, Liquids

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Due to their strong absorption in water IR-lasers are excellent sources for precision cutting with minimal thermal damage in various fields of medicine. To understand the laser tissue interaction process one has to take into account the liquefaction of target material at the region of radiation impact. The dynamics of the created liquid may cause unexpected and undesirable effects for surgical laser applications. We studied the thermal damage along the walls of incision craters in terms of the elastic material properties and the dynamics of the drilling process. We show that the extension of thermally altered tissue is strongly influenced by the amount of hot liquefied tissue material remaining in the crater. When drilling into mechanically homogeneous materials this amount is essentially determined by the laser intensity used. However, when drilling through a composite structure consisting of various tissue types with different material properties, this is no longer the case. Even at low intensities, the damage zone varies substantially between the different layers. In our investigations we compared histologically and ultrastructurally the instantaneously created damage in the connective tissue and the subjacent skeletal muscle of skin after laser cutting, with long-time heating injuries. This comparison allows a differentiation between thermal and mechanical damage and an estimation of the minimum temperature created in the crater during the laser impact. The light microscopical examinations shows that the thermal damage in the connective tissue is about three times smaller than in the subjacent muscle layer. Comparative studies made with a composite structure consisting of the tissue substitutes gelatin and agar reveal that the unexpectedly large damage in the skeletal muscle layer is a result of the abrupt change of the elastic properties at the material transition. This discontinuity changes the ejection dynamics leading to a confinement of hot liquefied tissue material. The trapped hot liquid acts as an efficient heat source observed in the large damage of the muscle layer.

Proceedings Article | 1 June 1991 Paper

Measurement of temperature distributions after pulsed IR radiation impact in biological tissue models with fluorescent thin films

Valerio Romano, Martin Frenz, Heinz Weber, Charlotte Greber, Martin Forrer

Proceedings Volume 1427, (1991) https://doi.org/10.1117/12.44085

KEYWORDS: Tissues, Laser tissue interaction, Luminescence, Temperature metrology, Skin, Liver, Spatial resolution, Laser cutting, Erbium lasers, Thin films

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