Mr. Katsumasa Iwai Profile

Katsumasa Iwai

at National Institute of Technology, Sendai College

SPIE Involvement:

Author

Publications (53)

Proceedings Article | 8 March 2023 Paper

Delivery of Er:YAG laser radiation with repetition rate up to 150 Hz by a hollow glass waveguide

Michal Němec, Helena Jelínková, Jan Šulc, Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi

Proceedings Volume 12399, 123990O (2023) https://doi.org/10.1117/12.2647345

KEYWORDS: Waveguides, Laser radiation, Glasses, Er:YAG lasers, Silver, Polymers, Pulse signals, Hollow waveguides, Polymer multimode waveguides, Diodes

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Proceedings Article | 4 March 2022 Poster + Presentation + Paper

Investigations on transfer of the novel diode pumped Er:YAG laser radiation by special hollow glass waveguide

Michal Němec, Helena Jelínková, Jan Šulc, Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi

Proceedings Volume 11980, 119800C (2022) https://doi.org/10.1117/12.2607566

KEYWORDS: Waveguides, Glasses, Er:YAG lasers, Silver, Hollow waveguides, Polymer multimode waveguides, Diodes, Mid-IR, Diode pumped solid state lasers

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Proceedings Article | 2 March 2022 Presentation + Paper

Transmission properties of 700-μm-bore hollow optical fibers based on flexible Ni-Ti tube

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 11953, 1195303 (2022) https://doi.org/10.1117/12.2605723

KEYWORDS: Silver, Optical fibers, Gas lasers, Fiber lasers, Carbon monoxide, Coating, Silicon, Visible radiation, Polymers, Mirrors

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Proceedings Article | 5 March 2021 Presentation + Paper

Fabrication of 800-μm-bore hollow optical fibers based on completely non-fragile and flexible Ni-Ti tube for the infrared

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 11635, 116350L (2021) https://doi.org/10.1117/12.2576477

KEYWORDS: Optical fibers, Infrared radiation, Polymers, Dielectrics, Coating, Carbon dioxide lasers

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Proceedings Article | 20 February 2020 Presentation + Paper

Transmission properties of dielectric-coated hollow optical fibers based on Ni-Ti tube

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 11233, 1123315 (2020) https://doi.org/10.1117/12.2542148

KEYWORDS: Silver, Gas lasers, Optical fibers, Fiber lasers, Carbon monoxide, Silicon, Polymers, Coating, Visible radiation, Polymer thin films

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Proceedings Article | 27 February 2019 Presentation + Paper

Fabrication of 75-μm-bore hollow optical fibers for infrared transmission

Katsumasa Iwai, Yasuhiro Sasaki, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 10872, 108720J (2019) https://doi.org/10.1117/12.2507432

KEYWORDS: Silver, Quartz, Capillaries, Mirrors, Optical fibers, Dielectrics, Er:YAG lasers, Plating, Glasses, Iodine

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Proceedings Article | 13 February 2018 Presentation + Paper

Transmission properties of dielectric-coated hollow optical fibers based on stainless tube

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 10488, 1048804 (2018) https://doi.org/10.1117/12.2286807

KEYWORDS: Silver, Gas lasers, Polymers, Visible radiation, Coating, Polymer thin films

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Proceedings Article | 28 February 2017 Presentation + Paper

Improvement of transmission properties of visible pilot beam for polymer-coated silver hollow fibers with acrylic silicone resin as buffer layer for sturdy structure

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 10058, 1005810 (2017) https://doi.org/10.1117/12.2249749

KEYWORDS: Silver, Optical fibers, Polymers, Silicon, Er:YAG lasers, Coating, Plating, Semiconductor lasers, Glasses, Fiber lasers

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Proceedings Article | 7 March 2016 Presentation + Paper

Photoacoustic imaging by using a bundle of thin hollow-optical fibers

A. Seki, K. Iwai, T. Katagiri, Y. Matsuura

Proceedings Volume 9702, 970202 (2016) https://doi.org/10.1117/12.2209000

KEYWORDS: Optical fibers, Photoacoustic imaging, Imaging systems, Image resolution, Photoacoustic spectroscopy, Ultrasonography, Endoscopy, Optical resolution, Nd:YAG lasers, Blood vessels, Signal detection, Tissues, 3D image processing

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Proceedings Article | 7 March 2016 Paper

Silver hollow optical fibers with acrylic silicone resin coating as buffer layer for sturdy structure

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 9702, 97020Z (2016) https://doi.org/10.1117/12.2208314

KEYWORDS: Silver, Optical fibers, Silicon, Glasses, Coating, Infrared lasers, Infrared radiation, Silica, Capillaries, Plating, Polymers, Fiber lasers

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Proceedings Article | 5 March 2015 Paper

Improvement of transmission properties for a rugged polymer-coated silver hollow fiber

Katsumasa Iwai, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 9317, 93170I (2015) https://doi.org/10.1117/12.2076337

KEYWORDS: Silver, Polymers, Er:YAG lasers, Coating, Glasses, Capillaries, Plating, Fabrication, Fiber lasers, Silica

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Proceedings Article | 20 February 2014 Paper

Fabrication of 50-µm-bore hollow fiber for infrared transmission

Katsumasa Iwai, Kouki Takahashi, Hiroyuki Takaku, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 8938, 893808 (2014) https://doi.org/10.1117/12.2036666

KEYWORDS: Silver, Capillaries, Plating, Iodine, Dielectrics, Er:YAG lasers, Infrared radiation, Coating, Infrared lasers, Reflection

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Proceedings Article | 20 March 2013 Paper

Fabrication of a rugged polymer-coated silver hollow fiber with a vitreous film for the infrared

Katsumasa Iwai, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 8576, 857602 (2013) https://doi.org/10.1117/12.2002364

KEYWORDS: Silver, Polymers, Coating, Glasses, Polymer thin films, Er:YAG lasers, Fabrication, Vitreous, Plating, Infrared radiation

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Proceedings Article | 16 May 2012 Paper

Transfer capability of 3-5 um radiation by hollow glass waveguide

Michal Nemec, Helena Jelínková, Mitsunobu Miyagi, Hiroyuki Takaku, Katsumasa Iwai, Yuji Matsuura, Maxim Doroshenko

Proceedings Volume 8433, 84331H (2012) https://doi.org/10.1117/12.921525

KEYWORDS: Waveguides, Glasses, Er:YAG lasers, Mid-IR, Crystals, Laser systems engineering, Hollow waveguides, Solar energy, Silver, Laser crystals

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Proceedings Article | 30 January 2012 Paper

Dy:PbGa2S4 laser radiation and its delivery by hollow waveguide

Helena Jelínková, Michal Nemec, Mitsunobu Miyagi, Katsumasa Iwai, Hiroyuki Takaku, Maxim Doroshenko, Tasoltan Basiev, Valerii Badikov, Dmitri Badikov

Proceedings Volume 8218, 82180R (2012) https://doi.org/10.1117/12.908113

KEYWORDS: Waveguides, Hollow waveguides, Mid-IR, Glasses, Silver, Laser energy, Laser applications, Polymers, Reflectivity, Optical pumping

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Proceedings Article | 30 January 2012 Paper

Uniform polymer-film formation in 100-um-bore hollow fiber for Er:YAG laser transmission

Katsumasa Iwai, Masanao Suzuki, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 8218, 821804 (2012) https://doi.org/10.1117/12.905925

KEYWORDS: Coating, Er:YAG lasers, Silver, Polymers, Fiber lasers, Dielectrics, Visible radiation, Fiber coatings, Infrared radiation, Laser dentistry

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Proceedings Article | 30 January 2012 Paper

Optimal design for hollow fiber inner-coated by dielectric layers with surface roughness

Bang-Shan Sun, Xiao-Li Tang, Yi-Wei Shi, Katsumasa Iwai, Mitsunobu Miyagi

Proceedings Volume 8218, 82180Q (2012) https://doi.org/10.1117/12.907687

KEYWORDS: Absorption, Dielectrics, Refractive index, Surface roughness, Multilayers, Infrared radiation, Coating, Waveguides, Hollow waveguides, Metals

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Proceedings Article | 16 February 2011 Paper

Fabrication of silver-coated hollow fiber with an inner diameter of 100 µm or less

Katsumasa Iwai, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 7894, 78940B (2011) https://doi.org/10.1117/12.874087

KEYWORDS: Silver, Signal attenuation, Capillaries, Plating, Fiber lasers, Gaussian beams, Infrared lasers, Er:YAG lasers, Infrared radiation, Coating

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Proceedings Article | 16 February 2011 Paper

Fe:ZnSe laser radiation transmission by hollow waveguide

Michal Němec, Helena Jelínková, Jan Šulc, Mitsunobu Miyagi, Katsumasa Iwai, Hiroyuki Takaku, Maxim Doroshenko, Tasoltan Basiev, Vitaly Komar, Andriy Gerasimenko

Proceedings Volume 7894, 789405 (2011) https://doi.org/10.1117/12.873536

KEYWORDS: Waveguides, Hollow waveguides, Glasses, Er:YAG lasers, Silica, Mid-IR, Crystals, Q switched lasers, Laser applications, Laser crystals

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Proceedings Article | 24 February 2010 Paper

FT-IR based loss-spectrum measuring system for infrared hollow waveguides

Cong-Hui Yang, Hua Hua, Wei Tan, Yi-Wei Shi, Katsumasa Iwai, Mitsunobu Miyagi

Proceedings Volume 7559, 75590R (2010) https://doi.org/10.1117/12.841916

KEYWORDS: Waveguides, Hollow waveguides, FT-IR spectroscopy, Light sources, Infrared radiation, Absorption, Signal attenuation, Sapphire, Refractive index, Sensors

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Proceedings Article | 24 February 2010 Paper

Hollow waveguide for urology treatment

H. Jelínková, M. Němec, P. Koranda, J. Pokorný, O. Kőhler, P. Drlík, M. Miyagi, K. Iwai, Y. Matsuura

Proceedings Volume 7559, 755907 (2010) https://doi.org/10.1117/12.840916

KEYWORDS: Er:YAG lasers, Waveguides, Laser tissue interaction, Pulsed laser operation, Hollow waveguides, Laser systems engineering, Tissues, Laser therapeutics, Glasses, Mid-IR

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Proceedings Article | 24 February 2010 Paper

Transmission properties of dielectric-coated hollow optical fibers based on silver-cladding-stainless pipe

Katsumasa Iwai, Akihito Hongo, Hiroyuki Takaku, Mitsunobu Miyagi, Junichi Ishiyama, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 7559, 755904 (2010) https://doi.org/10.1117/12.840581

KEYWORDS: Silver, Carbon dioxide lasers, Metals, Infrared radiation, Coating, Iodine, Dielectrics, Polymers, Waveguides, Optical fibers

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Proceedings Article | 24 February 2009 Paper

Laser brackets debonding: Tm:YAP, Nd:YAG, and GaAs diode lasers evaluation

Tat'jana Dostálová, Helena Jelínková, Jan Šulc, Petr Koranda, Michal Němec, Ilja Ivanov, Mitsunobu Miyagi, Katsumasa Iwai

Proceedings Volume 7162, 71620C (2009) https://doi.org/10.1117/12.808137

KEYWORDS: Laser dentistry, Semiconductor lasers, Teeth, Ceramics, Diodes, Nd:YAG lasers, Adhesives, Gallium arsenide, Scanning electron microscopy, Americium

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Proceedings Article | 23 February 2009 Paper

Comparison of Ho:YAG and Er:YAG lasers for lithotripsy

Helena Jelínková, Oto Kőhler, Mitsunobu Miyagi, Petr Koranda, Michal Němec, Jan Šulc, Martin Fibrich, Jan Pokorny, Katsumasa Iwai, Yuji Matsuura

Proceedings Volume 7161, 71611H (2009) https://doi.org/10.1117/12.808667

KEYWORDS: Er:YAG lasers, Pulsed laser operation, Waveguides, Laser therapeutics, Laser ablation, In vitro testing, Laser systems engineering, Glasses, Silica, Hollow waveguides

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Proceedings Article | 21 February 2009 Paper

Fabrication of SiO2/AgI/SiO2/Ag hollow glass fiber for infrared transmission

Ke-Rong Sui, Xiao Lin, Xiao-Song Zhu, Yi-Wei Shi, Katsumasa Iwai, Mitsunobu Miyagi

Proceedings Volume 7173, 71730G (2009) https://doi.org/10.1117/12.807904

KEYWORDS: Silver, Silica, Dielectrics, Structured optical fibers, Glasses, Infrared radiation, Fabrication, Coating, Mirrors, Capillaries

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Proceedings Article | 21 February 2009 Paper

Simultaneous irradiation of Er:YAG and Ho:YAG lasers for efficient ablation of hard tissues

Tomonori Watanabe, Katsumasa Iwai, Yuji Matsuura

Proceedings Volume 7173, 71730R (2009) https://doi.org/10.1117/12.807910

KEYWORDS: Er:YAG lasers, Laser ablation, Tissues, Laser dentistry, Laser cutting, Absorption, Cameras, Optical fibers, Teeth, Pulsed laser operation

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Proceedings Article | 21 February 2009 Paper

Fabrication of hollow optical fiber with a vitreous film for CO2 laser light delivery

Katsumasa Iwai, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 7173, 71730Q (2009) https://doi.org/10.1117/12.807602

KEYWORDS: Optical fibers, Silver, Carbon dioxide lasers, Vitreous, Coating, Dielectrics, Infrared radiation, Infrared lasers, Fiber lasers, Visible radiation

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Proceedings Article | 21 February 2009 Paper

250 um inner diameter hollow waveguide for Er:YAG laser radiation

Michal Němec, Helena Jelínková, Mitsunobu Miyagi, Katsumasa Iwai, Yuji Matsuura

Proceedings Volume 7173, 71730H (2009) https://doi.org/10.1117/12.808097

KEYWORDS: Waveguides, Er:YAG lasers, Cameras, 3D image processing, Stereoscopic cameras, Hollow waveguides, Glasses, Laser dentistry, Laser energy, Polymers

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Proceedings Article | 18 November 2008 Paper

Lasers for lithotripsy

Petr Koranda, Michal Nemec, Helena Jelinková, Jan Pokorny, Oto Kőhler, Pavel Drlík, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 7138, 71380L (2008) https://doi.org/10.1117/12.817985

KEYWORDS: Er:YAG lasers, Waveguides, Laser therapeutics, Pulsed laser operation, Silica, Laser energy, Laser ablation, Resonators, Laser applications, Laser systems engineering

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Proceedings Article | 22 April 2008 Paper

Nd:YAG laser systems with radiation delivery by thin hollow waveguides

Michal Nemec, Helena Jelínková, Jan Šulc, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6998, 699819 (2008) https://doi.org/10.1117/12.780429

KEYWORDS: Waveguides, Nd:YAG lasers, Semiconductor lasers, Diodes, Alexandrite lasers, Glasses, Laser systems engineering, Crystals, Hollow waveguides, Laser crystals

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Proceedings Article | 7 February 2008 Paper

Thin hollow glass waveguide for near IR radiation delivery

Michal Němec, Helena Jelínková, Jan Šulc, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6852, 68520W (2008) https://doi.org/10.1117/12.761837

KEYWORDS: Waveguides, Glasses, Nd:YAG lasers, Semiconductor lasers, Laser systems engineering, Laser dentistry, Q switched lasers, Crystals, Alexandrite lasers, Silver

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Proceedings Article | 7 February 2008 Paper

Dual-wavelength laser radiation through hollow optical fiber for hard tissue ablation

Tomonori Watanabe, Katsumasa Iwai, Yuji Matsuura

Proceedings Volume 6852, 68520E (2008) https://doi.org/10.1117/12.761421

KEYWORDS: Laser ablation, Er:YAG lasers, Optical fibers, Tissues, Laser tissue interaction, Fiber lasers, Laser cutting, Absorption, Natural surfaces, Cameras

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Proceedings Article | 7 February 2008 Paper

Fabrication of 100-µm-bore hollow fiber for infrared transmission

Katsumasa Iwai, Mitsunobu Miyagi, Yi-Wei Shi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 6852, 68520S (2008) https://doi.org/10.1117/12.767934

KEYWORDS: Silver, Er:YAG lasers, Dielectrics, Capillaries, Coating, Silica, Infrared radiation, Signal attenuation, Fiber lasers, Fiber coatings

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Proceedings Article | 18 July 2007 Paper

Flexible hollow polycarbonate fiber for endoscopic infrared laser treatment

Masayuki Nakazawa, Yi-Wei Shi, Katsumasa Iwai, Yuji Matsuura, Xiao-Song Zhu, Mitsunobu Miyagi

Proceedings Volume 6631, 66311A (2007) https://doi.org/10.1117/12.728906

KEYWORDS: Capillaries, Thermography, Infrared imaging, Silver, Endoscopes, Infrared radiation, Er:YAG lasers, Endoscopy, Glasses, Fiber lasers

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Proceedings Article | 8 March 2007 Paper

Er:YAG laser micro-preparation of hard dental tissue

Tat'jana Dostálová, Helena Jelínková, Michal Nemec, Petr Koranda, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6425, 64250G (2007) https://doi.org/10.1117/12.698148

KEYWORDS: Er:YAG lasers, Teeth, Laser dentistry, Laser tissue interaction, Q switching, Q switched lasers, Composites, Tissues, Waveguides, Ultrasonics

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Proceedings Article | 15 February 2007 Paper

Modification of mid-infrared radiation spatial structure caused by COP/Ag hollow waveguide

Michal Nĕmec, Helena Jelínková, Martin Fibrich, Petr Koranda, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6433, 643306 (2007) https://doi.org/10.1117/12.698140

KEYWORDS: Waveguides, Semiconductor lasers, Diodes, Laser systems engineering, Hollow waveguides, Er:YAG lasers, Glasses, Mid-IR, Resonators, Dielectrics

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Proceedings Article | 15 February 2007 Paper

Hollow infrared fiber with an inorganic inner coating layer with high durability

Katsumasa Iwai, Yi-Wei Shi, Mitsunobu Miyagi, Xiao-Song Zhu, Yuji Matsuura

Proceedings Volume 6433, 64330L (2007) https://doi.org/10.1117/12.724859

KEYWORDS: Silver, Coating, Gas lasers, Infrared radiation, Polymers, Carbon monoxide, Dielectrics, Er:YAG lasers, Glasses, Fiber lasers

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Proceedings Article | 8 February 2007 Paper

Simultaneous delivery of Er:YAG and Ho:YAG lasers by using hollow optical fibers for endoscopic lithotripsy

Katsumasa Iwai, Yuji Matsuura, Mitsunobu Miyagi

Proceedings Volume 6433, 64330A (2007) https://doi.org/10.1117/12.699794

KEYWORDS: Er:YAG lasers, Calculi, Optical fibers, Calculus, Radiation effects, Laser therapeutics, Fiber lasers, Pulsed laser operation, Endoscopy, Renal calculi

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Proceedings Article | 17 April 2006 Paper

Generation of powerful 3 microns radiation and its delivery

Miroslav Čech, Michal Němec, Petr Koranda, Helena Jelínkova, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6190, 619016 (2006) https://doi.org/10.1117/12.663624

KEYWORDS: Er:YAG lasers, Resonators, Waveguides, Laser tissue interaction, Q switched lasers, Tissues, Switching, Q switches, Radiation effects, Glasses

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Proceedings Article | 22 February 2006 Paper

Er:YAG laser radiation for soft and hard urological tissue treatment

Petr Koranda, Helena Jelínkova, Michal Němec, Oto Köhler, Pavel Drlík, Jan Pokorný, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6078, 60781E (2006) https://doi.org/10.1117/12.645926

KEYWORDS: Er:YAG lasers, Laser tissue interaction, Q switched lasers, Laser ablation, Waveguides, Tissues, Laser damage threshold, Laser systems engineering, Hollow waveguides, Pulsed laser operation

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Proceedings Article | 15 February 2006 Paper

Uniform polymer-film formation in hollow fiber by closed loop-coating method

Katsumasa Iwai, Mitsunobu Miyagi, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6083, 60830J (2006) https://doi.org/10.1117/12.649404

KEYWORDS: Gas lasers, Polymers, Coating, Silver, Optical fibers, Carbon monoxide, Fiber lasers, Visible radiation, Polymer optical fibers, Infrared lasers

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Proceedings Article | 15 February 2006 Paper

Selective preparation of hard dental tissue: classical and laser treatments comparison

Tat'jana Dostálov, Helena Jelínkova, Michal Nĕmec, Petr Koranda, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6137, 61370E (2006) https://doi.org/10.1117/12.647436

KEYWORDS: Er:YAG lasers, Laser tissue interaction, Tissues, Teeth, Laser dentistry, Natural surfaces, Q switching, Laser therapeutics, Composites, Q switched lasers

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Proceedings Article | 15 February 2006 Paper

Medical applications of 3 μm delivery waveguide system

Michal Němec, Helena Jelínkova, Petr Koranda, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6083, 60830M (2006) https://doi.org/10.1117/12.645893

KEYWORDS: Waveguides, Tissues, Er:YAG lasers, Glasses, Q switching, Laser systems engineering, Mirrors, Mid-IR, Polymers, Silver

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Proceedings Article | 23 March 2005 Paper

Fragmentation characteristics of various calculi evaluated by using hollow fibers for Er:YAG laser light

Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura, Mitsunobu Miyagi, Seichi Saito, Youichi Arai, Helena Jelinkova

Proceedings Volume 5691, (2005) https://doi.org/10.1117/12.601855

KEYWORDS: Er:YAG lasers, Calculus, Calculi, Optical fibers, Absorption, Laser cutting, Magnesium, Polymers, Laser systems engineering, Silver

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Proceedings Article | 21 June 2004 Paper

Infrared hollow optical fibers and their applications in medicine

Yi-Wei Shi, Yuji Matsuura, Katsumasa Iwai, Masashi Endo, Takashi Katagiri, Mitsunobu Miyagi

Proceedings Volume 5449, (2004) https://doi.org/10.1117/12.563189

KEYWORDS: Er:YAG lasers, Optical fibers, Carbon dioxide lasers, Calculus, Laser development, Infrared radiation, Silver, Visible radiation, Polymers, Infrared lasers

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Proceedings Article | 10 June 2004 Paper

Dynamic absorption coefficient of water for high-density Er:YAG laser radiation

Katsumasa Iwai, Masashi Endo, Kentaro Ito, Yi-Wei Shi, Yuji Matsuura, Mitsunobu Miyagi, Helena Jelinkova

Proceedings Volume 5317, (2004) https://doi.org/10.1117/12.531793

KEYWORDS: Er:YAG lasers, Signal attenuation, Absorption, Water, Silica, Beam delivery, Laser energy, Laser tissue interaction, Laser applications, Lamps

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Proceedings Article | 1 July 2003 Paper

Hollow waveguide delivery system for ophthalmology treatment

Helena Jelinkova, Michal Nemec, Jan Sulc, Miroslav Cech, Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura, Jiri Pasta

Proceedings Volume 4957, (2003) https://doi.org/10.1117/12.478041

KEYWORDS: Er:YAG lasers, Tissues, Waveguides, Eye, Cornea, Sclera, Hollow waveguides, Ophthalmology, Laser ablation, Mid-IR

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Proceedings Article | 1 July 2003 Paper

Calculi fragmentation of Er:YAG laser light through a sealed flexible hollow fiber delivery system

Katsumasa Iwai, Yi-Wei Shi, Koh Nito, Yuji Matsuura, Takao Kasai, Mitsunobu Miyagi, Seichi Saito, Youichi Arai, Naomasa Ioritani, Yoshihide Okagami, Michal Nemec, Jan Sulc, Helena Jelinkova, Miroslav Zavoral, Oto Kohler, Pavel Drlik

Proceedings Volume 4957, (2003) https://doi.org/10.1117/12.476798

KEYWORDS: Calculus, Er:YAG lasers, Hollow waveguides, Calculi, Quartz, Fiber lasers, Laser systems engineering, Silver, Laser ablation, Optical fibers

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Proceedings Article | 1 July 2003 Paper

Delivery of high-energy radiation in midinfrared spectral region by hollow waveguides

Michal Nemec, Helena Jelinkova, Jan Sulc, Pavel Cerny, Mitsunobu Miyagi, Katsumasa Iwai, Yukio Abe, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 4957, (2003) https://doi.org/10.1117/12.478044

KEYWORDS: Waveguides, Glasses, Er:YAG lasers, Nd:YAG lasers, Mid-IR, Silver, Hollow waveguides, Polymers, Medicine, Polymer multimode waveguides

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Proceedings Article | 12 September 2002 Paper

Rugged hollow fiber for the infrared and its use in laser lithotripsy

Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura, Mitsunobu Miyagi

Proceedings Volume 4916, (2002) https://doi.org/10.1117/12.482940

KEYWORDS: Polymers, Polymer thin films, Calculus, Coating, Er:YAG lasers, Silver, Glasses, Infrared radiation, Fiber lasers, Laser lithotripsy

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SPIE Journal Paper | 1 July 2002

Equivalent complex refractive indices for ray-tracing evaluation of dielectric-coated hollow waveguides

Katsumasa Iwai, Yukio Abe, Yuji Matsuura, Mitsunobu Miyagi

OE, Vol. 41, Issue 07, (July 2002) https://doi.org/10.1117/12.10.1117/1.1485090

KEYWORDS: Refractive index, Hollow waveguides, Metals, Waveguides, Reflectivity, Dielectrics, Silver, Ray tracing, Reflection, Infrared lasers

Proceedings Article | 26 March 2002 Paper

Hollow bent output devices in CO2 laser light delivery system

Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura, Mitsunobu Miyagi, Junko Oishi, Yoshihide Okagami

Proceedings Volume 4616, (2002) https://doi.org/10.1117/12.463808

KEYWORDS: Carbon dioxide lasers, Nickel, Glasses, Polymers, Laser systems engineering, Surgery, Silver, Space operations, Temperature metrology, Metals

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Proceedings Article | 26 March 2002 Paper

Transmission characteristics of sealed hollow waveguides for Er:YAG laser radiation and their application in the ophthalmology

Helena Jelinkova, Michal Nemec, Jan Sulc, Jiri Pasta, Katsumasa Iwai, Yukio Abe, Yi-Wei Shi, Yuji Matsuura, Mitsunobu Miyagi

Proceedings Volume 4616, (2002) https://doi.org/10.1117/12.463806

KEYWORDS: Waveguides, Glasses, Hollow waveguides, Transmittance, Er:YAG lasers, Silica, Ophthalmology, Laser systems engineering, Tissues, Photography

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