Prof. Ken-ichi Ueda Profile

Prof. Ken-ichi Ueda

Professor and Lab Director at Univ. of Electro Communications

SPIE Involvement:

Author

Publications (57)

Proceedings Article | 13 March 2024 Presentation

Presentation

High power conduction-cooled active-mirror laser

Jumpei Ogino, Koji Tsubakimoto, Hidetsugu Yoshida, Shinji Motokoshi, Noboru Morio, Keiko Matsumoto, Kana Fujioka, Shigeki Tokita, Noriaki Miyanaga, Ken-ichi Ueda, Ryousuke Kodama, Akifumi Yogo, Junji Kawanaka

Proceedings Volume PC12864, PC128640B (2024) https://doi.org/10.1117/12.3005462

KEYWORDS: Laser crystals, High power lasers, Radiotherapy, Pulsed laser operation, Laser therapeutics, Laser energy, Heatsinks, Disk lasers, Cryogenics, Wavefront distortions

Read Abstract +

Proceedings Article | 16 February 2012 Paper

Paper

High-power single-frequency photonic bandgap fiber amplifier at 1178 nm

Meishin Chen, Akira Shirakawa, Yoshiaki Yamahara, Ken-ichi Ueda, Christina Olausson, Jens Lyngsø, Jes Broeng

Proceedings Volume 8237, 82371H (2012) https://doi.org/10.1117/12.908391

KEYWORDS: Raman spectroscopy, Fiber amplifiers, Amplifiers, Acoustics, Optical amplifiers, Fiber lasers, Optical isolators, Laser scattering, Scattering, Ytterbium

Read Abstract +

Proceedings Article | 17 February 2010 Paper

Paper

Power-scalable long-wavelength Yb-doped photonic bandgap fiber sources

Christina Olausson, Akira Shirakawa, Hiroki Maruyama, Ken-ichi Ueda, Jens Lyngsø, Jes Broeng

Proceedings Volume 7580, 758013 (2010) https://doi.org/10.1117/12.845938

KEYWORDS: Fiber amplifiers, Fiber lasers, Amplifiers, Ytterbium, Cladding, Second-harmonic generation, Harmonic generation, Semiconductor lasers, Laser applications, Raman spectroscopy

Read Abstract +

Proceedings Article | 20 February 2007 Paper

Paper

Laser performance of Yb3+:YAG ceramic microchip lasers

Jun Dong, Akira Shirakawa, Ken-ichi Ueda, Hideki Yagi, Takagimi Yanagitani, Alexander Kaminskii

Proceedings Volume 6451, 645118 (2007) https://doi.org/10.1117/12.699056

KEYWORDS: Ceramics, YAG lasers, Chromium, Absorption, Ytterbium, Q switched lasers, Output couplers, Pulsed laser operation, Picosecond phenomena, Laser applications

Read Abstract +

The optical properties of Yb:YAG ceramic doped with different Yb concentrations are presented. The absorption coefficient at peak absorption wavelength of 940 nm increases linearly with Yb concentration in Yb:YAG ceramics. Low-threshold and highly-efficient continuous-wave (cw) laser-diode end-pumped Yb:YAG microchip ceramic laser with near-diffraction-limited beam quality was demonstrated at room temperature. Slope efficiencies of 79%, 67% and optical-to-optical efficiency of 60%, 53% at 1030 nm and 1049 nm, respectively were achieved for 1-mm-thick Yb:YAG ceramic plate (C_Yb = 9.8 at.%) under cw laser-diode pumping. Dual-wavelength operation at 1030 nm and 1049 nm with 5% transmission of the output coupler was achieved by varying pump power intensity. 1049 nm laser operation was automatically obtained by using 5% transmission output coupler when absorbed pump power is higher than 1 W. The lasers operate in multi-longitudinal-mode; the effect of pump power on the laser emission spectra for both wavelengths is addressed. The laser wavelength around 1030 nm shifts to short wavelength at low pump power region and then to red with increase of the absorbed pump power, while the laser wavelength around 1049 nm does not change with the pump power. Excellent laser performance indicates Yb:YAG ceramic laser materials could be potentially used in high-power solid-state lasers operating at 1030 nm, 1049 nm, or both wavelengths simultaneously. Laser-diode pumped lowthreshold and highly-efficient passively Q-switched Yb:YAG ceramic microchip laser with Cr⁴⁺:YAG ceramic as saturable absorber has also been demonstrated. The slope efficiency is as high as 37%, and the optical-to-optical efficiency is as high as 29% for 89% initial transmission of Cr⁴⁺:YAG ceramic. The pulse width of 380 ps and peak power of over 82 kW at repetition rate of 12.4 kHz was obtained. Single-longitudinal-mode oscillation and wide-separated multi-longitudinal-mode oscillation due to etalon effect of Cr⁴⁺:YAG thin plate was achieved depending on the pump power level.

Proceedings Article | 8 September 2006 Paper

Paper

Switchable lasing of 1040- and 1537-nm lines based on the optical bistability in the pump-bypassed ytterbium-doped fiber laser

Jianlang Li, Mitsuru Musha, Akira Shirakawa, Ken-ichi Ueda

Proceedings Volume 6310, 63100G (2006) https://doi.org/10.1117/12.683812

KEYWORDS: Fiber lasers, Bistability, Ytterbium, Absorption, Wavelength division multiplexing, Fiber Bragg gratings, Fiber optic communications, Fiber optics, Laser optics, Free space optics

Read Abstract +

Proceedings Article | 8 June 2006 Paper

Paper

Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror

Takuya Nayuki, Takashi Fujii, Yuji Oishi, Kei Takano, Xiaofang Wang, Alexander Andreev, Koshichi Nemoto, Ken-ichi Ueda

Proceedings Volume 6018, 60180F (2006) https://doi.org/10.1117/12.669278

Read Abstract +

Proceedings Article | 5 December 2005 Paper

Paper

Antiphase states of sub-nanosecond Cr,Yb:YAG microchip self-Q-switched multimode laser

Jun Dong, Akira Shirakawa, Ken-ichi Ueda

Proceedings Volume 6020, 60201C (2005) https://doi.org/10.1117/12.634969

KEYWORDS: Absorption, Pulsed laser operation, Numerical simulations, Q switched lasers, Crystals, Hole burning spectroscopy, Semiconductor lasers, Chromium, Continuous wave operation, Laser crystals

Read Abstract +

Proceedings Article | 22 April 2005 Paper

Paper

Fiber laser coherent array for power scaling, bandwidth narrowing, and coherent beam direction control

Akira Shirakawa, Keigo Matsuo, Ken-ichi Ueda

Proceedings Volume 5709, (2005) https://doi.org/10.1117/12.590328

KEYWORDS: Fiber lasers, Fiber couplers, Reflectivity, Beam controllers, Resonators, Fiber Bragg gratings, Wavelength division multiplexing, Laser resonators, Laser damage threshold, Electro optics

Read Abstract +

Proceedings Article | 22 April 2005 Paper

Paper

CW 7-W 900-nm-wide supercontinuum source by phosphosilicate fiber Raman laser and high-nonlinear fiber

Akira Shirakawa, Ken-ichi Ueda

Proceedings Volume 5709, (2005) https://doi.org/10.1117/12.590401

KEYWORDS: Fiber lasers, Raman spectroscopy, Continuous wave operation, Supercontinuum generation, Absorption, Fiber Bragg gratings, Supercontinuum sources, Modulation, Four wave mixing

Read Abstract +

Proceedings Article | 23 March 2005 Paper

Paper

Novel cooling technique for operation of quasi four-level solid-state laser

Todor Petrov, K. Takaichi, Hitoki Yoneda, Akira Shirakawa, Ken-ichi Ueda, Nikola Sabotinov

Proceedings Volume 5777, (2005) https://doi.org/10.1117/12.611229

KEYWORDS: Nitrogen, Ceramics, Liquids, Helium, Solid state lasers, Femtosecond phenomena, Crystals, Argon, Absorption, Fiber optic gyroscopes

Read Abstract +

Proceedings Article | 23 March 2005 Paper

Paper

Diode-pumped Yb:YLF chirped-pulse regenerative amplifier for high average power operation

Junji Kawanaka, Hajime Nishioka, Koichi Yamakawa, Ken-ichi Ueda

Proceedings Volume 5777, (2005) https://doi.org/10.1117/12.611030

KEYWORDS: Crystals, Laser crystals, Semiconductor lasers, Optical amplifiers, Pulsed laser operation, Copper, Sapphire lasers, Liquid crystals, Diodes, Liquids

Read Abstract +

Proceedings Article | 8 October 2004 Paper

Paper

Fiber laser coherent array for power scaling of single-mode fiber laser

Akira Shirakawa, Keigo Matsuo, Ken-ichi Ueda

Proceedings Volume 5662, (2004) https://doi.org/10.1117/12.596366

KEYWORDS: Fiber lasers, Fiber couplers, Beam controllers, Reflectivity, Resonators, Laser resonators, Single mode fibers, Fiber Bragg gratings, Laser applications, Laser processing

Read Abstract +

Proceedings Article | 15 September 2004 Paper

Paper

Random lasing in Nd:YAG nano-crystalline-powder pumped by laser diode

Yan Feng, Jianren Lu, Shenghong Wang, Ken-ichi Ueda

Proceedings Volume 5450, (2004) https://doi.org/10.1117/12.544940

KEYWORDS: Random lasers, Mirrors, Nd:YAG lasers, Neodymium, Semiconductor lasers, Backscatter, Laser damage threshold, Laser scattering, Scattering, Coating

Read Abstract +

Proceedings Article | 7 April 2004 Paper

Paper

Measurements of nonlinear refractive indices in ceramic laser media

Yuri Senatsky, Akira Shirakawa, Y. Sato, J. Hagiwara, Jianren Lu, Kichi Ueda, H. Yagi, T. Yanagitani

Proceedings Volume 5478, (2004) https://doi.org/10.1117/12.558509

KEYWORDS: Ceramics, Laser applications, Refractive index, Crystals, Laser crystals, Nonlinear crystals, Laser development, High power lasers, Pulsed laser operation, Laser spectroscopy

Read Abstract +

Proceedings Article | 10 November 2003 Paper

Paper

20-mJ diode-pumped chirped-pulse regenerative amplifier with a cooled Yb:LiYF4

Junji Kawanaka, Hajime Nishioka, Koichi Yamakawa, K. Ueda

Proceedings Volume 5120, (2003) https://doi.org/10.1117/12.515525

KEYWORDS: Crystals, Optical amplifiers, Laser crystals, Semiconductor lasers, Mirrors, Laser systems engineering, Laser development, Sapphire lasers, High power lasers, Reflectors

Read Abstract +

Proceedings Article | 6 October 2003 Paper

Paper

Raman fiber laser-pumped 2-um fiber laser

Atsushi Taniguchi, Tetsuro Kuwayama, Akira Shirakawa, Mitsuru Musha, Ken-ichi Ueda, Mahendra Prabhu

Proceedings Volume 5137, (2003) https://doi.org/10.1117/12.517936

KEYWORDS: Fiber lasers, Optical fibers, Ions, Wavelength division multiplexing, Fiber couplers, Raman spectroscopy, Single mode fibers, Fiber Bragg gratings, Absorption, Neodymium

Read Abstract +

SPIE Journal Paper | 1 September 2003

Influence of cross-sectional shape on absorption characteristics of double-clad fiber lasers

Jianqiu Xu, Junhua Lu, Jianren Lu, Ken-ichi Ueda

OE, Vol. 42, Issue 09, (September 2003) https://doi.org/10.1117/12.10.1117/1.1593662

KEYWORDS: Absorption, Cladding, Fiber lasers, Wave propagation, Optical engineering, Lutetium, 3D modeling, Refractive index, Differential equations, Chemical elements

Proceedings Article | 19 February 2003 Paper

Paper

Study of optical properties of ultrashort-pulse laser-heated material

Hitoki Yoneda, Satoru Ohta, Ken-ichi Ueda, Richard More

Proceedings Volume 4830, (2003) https://doi.org/10.1117/12.486507

KEYWORDS: Reflectivity, Laser beam diagnostics, Aluminum, Plasmas, Optical properties, Data modeling, Solids, Absorption, Pulsed laser operation, Skin

Read Abstract +

Proceedings Article | 5 September 2002 Paper

Paper

Diode-pumped Yb:Y2O3 ceramic laser

Jian Kong, Ding Tang, Deyuan Shen, Jianren Lu, K. Takaichi, T. Uematsu, Ken-ichi Ueda, Hideki Yagi, T. Yanagitani, Alexander Kaminskii

Proceedings Volume 4914, (2002) https://doi.org/10.1117/12.481803

KEYWORDS: Ceramics, Crystals, Laser crystals, Semiconductor lasers, Absorption, Nd:YAG lasers, Neodymium, Ytterbium, Laser damage threshold, Glasses

Read Abstract +

Proceedings Article | 10 June 2002 Paper

Paper

Acousto-optical tomography by coaxial detection with frequency-swept ultrasound modulation

Yong Yao, Da Xing, Ken-ichi Ueda

Proceedings Volume 4618, (2002) https://doi.org/10.1117/12.491320

KEYWORDS: Tomography, Ultrasonography, Transducers, Modulation, Ultrasonics, Tissue optics, Image resolution, Photons, Avalanche photodetectors, Laser optics

Proceedings Article | 6 June 2002 Paper

Paper

Tumor detection with sonodynamic chemiluminescence from ATX-70 and FCLA under ultrasonic excitation

Yonghong He, Da Xing, Yong Yao, Guihong Yan, Ken-ichi Ueda

Proceedings Volume 4612, (2002) https://doi.org/10.1117/12.469348

KEYWORDS: Tumors, Chemiluminescence, Oxygen, Ultrasonography, Tissues, Ultrasonics, In vitro testing, Sonoluminescence, In vivo imaging, Diagnostics

Read Abstract +

Proceedings Article | 29 October 2001 Paper

Paper

High-power diode-pumped passively Q-switched Nd:S-VAP laser with Cr4+:YAG crystal saturable absorber

Deyuan Shen, Ding Tang, Siu Chung Tam, Ken-ichi Ueda

Proceedings Volume 4595, (2001) https://doi.org/10.1117/12.446630

KEYWORDS: YAG lasers, Chromium, Laser crystals, Q switched lasers, Absorption, Semiconductor lasers, Crystals, Nd:YAG lasers, Laser development, High power lasers

Read Abstract +

Proceedings Article | 29 October 2001 Paper

Paper

Side pumping of double clad fiber laser with a nonfusional fiber coupler

Jianqiu Xu, Junhua Lu, Jianren Lu, Ken-ichi Ueda

Proceedings Volume 4594, (2001) https://doi.org/10.1117/12.446553

KEYWORDS: Fiber couplers, Fiber lasers, Polishing, Optical pumping, Adhesives, Cladding, Interfaces, Fiber to the x, Neodymium, Helium neon lasers

Read Abstract +

Proceedings Article | 25 October 2001 Paper

Paper

Chemiluminescence detection from sonodynamic action in vitro and in vivo

Yonghong He, Da Xing, Guihong Yan, Ken-ichi Ueda

Proceedings Volume 4597, (2001) https://doi.org/10.1117/12.446658

KEYWORDS: Oxygen, Tumors, Chemiluminescence, In vivo imaging, In vitro testing, Ultrasonography, Tissues, Stereolithography, Amplifiers, Photons

Read Abstract +

Proceedings Article | 25 October 2001 Paper

Paper

Coaxial acousto-optical tomography

Yong Yao, Da Xing, Ken-ichi Ueda

Proceedings Volume 4597, (2001) https://doi.org/10.1117/12.446638

KEYWORDS: Tomography, Ultrasonography, Transducers, Ultrasonics, Tissue optics, Image resolution, Modulation, Photons, Tissues, Fiber lasers

Read Abstract +

Proceedings Article | 1 May 2001 Paper

Paper

Highly efficient ultra-broadband supercontinuum generation centered at 1484 nm using Raman fiber laser

Mahendra Prabhu, Nam Seong Kim, Jianren Lu, Jianqiu Xu, Ken-ichi Ueda

Proceedings Volume 4268, (2001) https://doi.org/10.1117/12.424629

KEYWORDS: Raman spectroscopy, Fiber Bragg gratings, Fiber lasers, Single mode fibers, Continuous wave operation, Mirrors, Reflectivity, Supercontinuum generation, Optical fibers, Fiber optics

Read Abstract +

Proceedings Article | 24 April 2001 Paper

Paper

Efficient diode-pumped double-clad Tm-doped silica fiber laser with a ring cavity

Jianqiu Xu, Jianren Lu, Mahendra Prabhu, Ken-ichi Ueda

Proceedings Volume 4270, (2001) https://doi.org/10.1117/12.424659

KEYWORDS: Fiber lasers, Reflectivity, Output couplers, Semiconductor lasers, Absorption, Objectives, Optical fibers, Mirrors, Fabry–Perot interferometers, Thulium

Read Abstract +

Proceedings Article | 16 April 2001 Paper

Paper

Highly efficient polycrystalline Nd:YAG ceramics laser

Jianren Lu, T. Murai, K. Takaichi, T. Uematsu, K. Misawa, Ken-ichi Ueda, Hideki Yagi, T. Yanagitani, Alexander Kaminskii

Proceedings Volume 4267, (2001) https://doi.org/10.1117/12.424620

KEYWORDS: Ceramics, Nd:YAG lasers, Laser crystals, Crystals, Neodymium, Mirrors, Optical pumping, High power lasers, Virtual point source, Continuous wave operation

Read Abstract +

Proceedings Article | 25 January 2001 Paper

Paper

Highly efficient lasers using polycrystalline Nd:YAG ceramics

Jianren Lu, Mahendra Prabhu, Ken-ichi Ueda, Hideki Yagi, T. Yanagitani, Alexis Kudryashov

Proceedings Volume 4184, (2001) https://doi.org/10.1117/12.414093

KEYWORDS: Ceramics, Nd:YAG lasers, Crystals, Laser crystals, Virtual point source, High power lasers, Mirrors, Optical pumping, Absorption, Laser damage threshold

Read Abstract +

Proceedings Article | 25 January 2001 Paper

Paper

High-power cw Raman fiber laser using phosphosilicate fiber pumped by Yb-doped double-clad fiber laser

Mahendra Prabhu, Nam Seong Kim, Jianren Lu, Ken-ichi Ueda

Proceedings Volume 4184, (2001) https://doi.org/10.1117/12.413981

KEYWORDS: Fiber lasers, Fiber Bragg gratings, Raman spectroscopy, Reflectivity, Mirrors, Output couplers, Silicon, Continuous wave operation, Raman scattering, Fiber amplifiers

Read Abstract +

Proceedings Article | 25 January 2001 Paper

Paper

Energy extraction performance for a diode-pumped CPA system in Yb-doped materials at low temperature

Junji Kawanaka, Hajime Nishioka, Norihiro Inoue, Yoshinori Kubota, Ken-ichi Ueda

Proceedings Volume 4184, (2001) https://doi.org/10.1117/12.414095

KEYWORDS: Absorption, Semiconductor lasers, Energy efficiency, Crystals, Polarization, Pulsed laser operation, Oscillators, Glasses, Laser damage threshold, Laser development

Read Abstract +

Proceedings Article | 11 October 2000 Paper

Paper

Enhanced sonoluminescence of tissues

Yonghong He, Da Xing, Yong Yao, Yonghong Tang, Shici Tan, Ken-ichi Ueda

Proceedings Volume 4224, (2000) https://doi.org/10.1117/12.403982

KEYWORDS: Tissues, Stereolithography, Liver, Sonoluminescence, Ultrasonography, Cavitation, Signal detection, Oxygen, Molecules, Chemiluminescence

Read Abstract +

Proceedings Article | 11 October 2000 Paper

Paper

New method of ultrasound-modulated optical tomography

Yong Yao, Da Xing, Yonghong He, Ken-ichi Ueda

Proceedings Volume 4224, (2000) https://doi.org/10.1117/12.403978

KEYWORDS: Modulation, Ultrasonography, Tissue optics, Ultrasonics, Signal to noise ratio, Tomography, Biomedical optics, Ultrasound-modulated optical tomography, Amplitude modulation, Light scattering

Read Abstract +

Proceedings Article | 9 October 2000 Paper

Paper

Mutual effects of stimulated Raman scattering and four-wave mixing in phosphosilicate fibers

Jianqiu Xu, Cheng Li, Jianren Lu, Ken-ichi Ueda

Proceedings Volume 4225, (2000) https://doi.org/10.1117/12.402671

KEYWORDS: Raman spectroscopy, Optical fibers, Raman scattering, Four wave mixing, Modulation, Silica, Laser scattering, Fiber lasers, Nd:YAG lasers, Polarization

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Numerical analysis of output performance of Nd-doped double-clad fiber lasers

Nam Seong Kim, Toshihiro Hamada, R. Mahendra Prabhu, Cheng Li, Jie Song, Deyuan Shen, Anping Liu, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380933

KEYWORDS: Fiber lasers, Reflectivity, Mirrors, Microscopes, Signal attenuation, Numerical analysis, Objectives, Absorption, Output couplers, Cladding

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Soft diaphragms for apodization of powerful laser beams

Leonid Vinogradsky, V. Kargin, Serge Sobolev, Iosif Zubarev, Mikhail Pyatakhin, Yuri Senatsky, A. Shelobolin, Vitaly Mizin, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380870

KEYWORDS: High power lasers, Liquids, Laser applications, Absorption, Glasses, Laser scattering, Apodization, Dielectrics, Laser damage threshold, Scattering

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Passively Q-switched Nd:S-VAP laser with a Cr4+:YAG crystal saturable absorber

Deyuan Shen, Cheng Li, Jie Song, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380940

KEYWORDS: Q switched lasers, YAG lasers, Semiconductor lasers, Laser crystals, Neodymium lasers, Nd:YAG lasers, Crystals, Output couplers, Absorption, Continuous wave operation

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Flash-lamp pumped high-power Cr-Tm:YAG and Cr-Tm-Ho:YAG lasers operating at 2-um wavelength

Cheng Li, Deyuan Shen, Jie Song, Nam Seong Kim, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380894

KEYWORDS: Q switched lasers, Pulsed laser operation, Crystals, High power lasers, Energy transfer, Thulium, Holmium, Lamps, Ions, Output couplers

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

New concept: fiber embedded disk and tube lasers

Hiroshi Sekiguchi, Guillaume Vienne, Akiyoshi Tanaka, Yukari Senda, Katsuhisa Ito, Yoshihiko Matsuoka, Hisayoshi Toratani, Shiro Takahashi, Hirofumi Miyajima, Hirofumi Kan, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380876

KEYWORDS: Fiber lasers, Doping, Silica, Optical fibers, Structured optical fibers, Absorption, Ions, Disk lasers, Waveguides, Glasses

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Frequency-stabilized injection-locked laser

Mitsuru Musha, Takeshi Kanaya, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380909

KEYWORDS: Fabry–Perot interferometers, Laser stabilization, Iodine, Servomechanisms, Absorption, Nd:YAG lasers, Sensors, Light sources, Laser development, Mirrors

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Simultaneous multiple-wavelength cw operation of LD-pumped Nd:(YAG, YLF) laser

Jie Song, Deyuan Shen, Anping Liu, Cheng Li, Nam Seong Kim, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380889

KEYWORDS: Mirrors, Composites, Laser crystals, Adhesives, Absorption, YAG lasers, Semiconductor lasers, Crystals, Virtual point source, Ions

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Diode-pumped Q-switched Tm:YAG laser in active mirror configuration

Cheng Li, Jie Song, Deyuan Shen, Nam Seong Kim, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380938

KEYWORDS: Semiconductor lasers, Crystals, Disk lasers, Laser crystals, Laser damage threshold, Q switched lasers, Continuous wave operation, Pulsed laser operation, Absorption, Laser applications

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Diode-pumped continuous-wave Nd:S-VAP/Nd:YVO4 hybrid laser

Deyuan Shen, Jie Song, Cheng Li, Nam Seong Kim, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380890

KEYWORDS: Neodymium lasers, Semiconductor lasers, Absorption, Crystals, Diodes, Laser crystals, Refractive index, Thermal effects, Continuous wave operation, Polarization

Read Abstract +

Proceedings Article | 3 April 2000 Paper

Paper

Raman fiber amplifier with signal-to-noise ratio enhancement using second Stokes control pulses and effect of double Rayleigh back-scattering

Nam Seong Kim, R. Mahendra Prabhu, Cheng Li, Jie Song, Deyuan Shen, Ken-ichi Ueda

Proceedings Volume 3889, (2000) https://doi.org/10.1117/12.380934

KEYWORDS: Signal to noise ratio, Raman spectroscopy, Fiber amplifiers, Raman scattering, Backscatter, Fiber lasers, Optical amplifiers, Interference (communication), Semiconductor lasers

Read Abstract +

Proceedings Article | 8 September 1999 Paper

Paper

Diode-pumped high-power fiber lasers and applications

Cheng Li, Jie Song, Nam Seong Kim, Ken-ichi Ueda

Proceedings Volume 3862, (1999) https://doi.org/10.1117/12.361084

KEYWORDS: Fiber lasers, Semiconductor lasers, Absorption, Cladding, High power fiber lasers, Thermal effects, Single mode fibers, Optical pumping, Mirrors, Raman spectroscopy

Read Abstract +

Proceedings Article | 24 May 1999 Paper

Paper

Interferometric gravitational wave detector TAMA-300 and the frequency-stabilized laser with high-finesse optical resonator

Mitsuru Musha, Akitoshi Ueda, Masatake Ohashi, Ken-ichi Ueda

Proceedings Volume 3611, (1999) https://doi.org/10.1117/12.349274

KEYWORDS: Mirrors, Reflectivity, Laser stabilization, Sensors, Fabry–Perot interferometers, Interferometers, Interferometry, Laser resonators, Transmittance, Optical resonators

Read Abstract +

Proceedings Article | 15 March 1999 Paper

Paper

High-intensity coherent supercontinuum radiation from optical channeling

Hajime Nishioka, Ken-ichi Ueda

Proceedings Volume 3734, (1999) https://doi.org/10.1117/12.342345

KEYWORDS: Pulsed laser operation, Absorption, Raman spectroscopy, Light sources, Transient nonlinear optics, Vacuum ultraviolet, Argon, Channel projecting optics, Optical amplifiers, Phase matching

Read Abstract +

Proceedings Article | 30 December 1998 Paper

Paper

Development of the nonlinear optical element for light-beam apodization and large-aperture laser amplifier decoupling

Leonid Vinogradsky, Serge Sobolev, Iosif Zubarev, Mikhail Pyatakhin, Yuri Senatsky, Vitaly Mizin, Ken-ichi Ueda

Proceedings Volume 3683, (1998) https://doi.org/10.1117/12.334815

KEYWORDS: Liquids, Optical components, Refractive index, Apodization, Laser amplifiers, Excimer lasers, High power lasers, Laser applications, Iodine, Neodymium

Read Abstract +

Proceedings Article | 7 August 1998 Paper

Paper

Design of high-brightness laser diode end-pumped Nd:YVO4/KTP lasers

Deyuan Shen, Jie Song, Anping Liu, Ken-ichi Ueda

Proceedings Volume 3549, (1998) https://doi.org/10.1117/12.344132

KEYWORDS: Ferroelectric materials, Neodymium lasers, Laser crystals, Semiconductor lasers, Mirrors, Laser development, Temperature metrology, Second-harmonic generation, Absorption, Crystals

Read Abstract +

Proceedings Article | 13 May 1998 Paper

Paper

Optical cavity and future style of high-power fiber lasers

Ken-ichi Ueda

Proceedings Volume 3267, (1998) https://doi.org/10.1117/12.308104

KEYWORDS: Fiber lasers, Absorption, Optical pumping, High power fiber lasers, Laser processing, High power lasers, Solid state lasers, Laser resonators, Laser scattering, Scattering

Read Abstract +

Proceedings Article | 31 March 1997 Paper

Paper

Effective absorption and pump loss of double-clad fiber lasers

Anping Liu, Jie Song, Kouichi Kamatani, Ken-ichi Ueda

Proceedings Volume 2986, (1997) https://doi.org/10.1117/12.270007

KEYWORDS: Absorption, Fiber lasers, Fiber coupled lasers, Fiber couplers, Cladding, Interfaces, Solid state lasers, Geometrical optics, 3D modeling, Neodymium

Read Abstract +

SPIE Journal Paper | 1 November 1996

Propagation losses of pump light in rectangular double-clad fibers

Anping Liu, Ken-ichi Ueda

OE, Vol. 35, Issue 11, (November 1996) https://doi.org/10.1117/12.10.1117/1.601052

KEYWORDS: Optical fibers, Cladding, Absorption, Fiber lasers, Signal attenuation, Sodium, Geometrical optics, Neodymium, Interfaces, Light wave propagation

Proceedings Article | 10 August 1994 Paper

Paper

Ultrastabilized solid state laser for gravitational wave detection

Ken-ichi Ueda, Noboru Uehara

Proceedings Volume 2097, (1994) https://doi.org/10.1117/12.183148

KEYWORDS: Laser stabilization, Nd:YAG lasers, Interference (communication), Solid state lasers, Fermium, Frequency modulation, Mirrors, Absorption, YAG lasers, Laser development

Read Abstract +

Proceedings Article | 5 August 1994 Paper

Paper

Bound-free VUV transitions of rare-gas-alkali ionic excimers by e-beam pumping

Da Xing, Ken-ichi Ueda, Hiroshi Takuma

Proceedings Volume 2321, (1994) https://doi.org/10.1117/12.182111

Read Abstract +

Proceedings Article | 30 April 1993 Paper

Paper

Laser-diode-pumped solid state lasers for gravitational wave antenna

Ken-ichi Ueda, Noboru Uehara

Proceedings Volume 1837, (1993) https://doi.org/10.1117/12.143686

KEYWORDS: Absorption, Laser stabilization, YAG lasers, Disk lasers, Solid state lasers, Fermium, Frequency modulation, High power lasers, Mirrors, Crystals

Read Abstract +

Proceedings Article | 1 June 1990 Paper

Paper

Subpicosecond pulse generation of KrF amplifier using acridine saturable absorber

Ken-ichi Ueda, Hajime Nishioka, Hideaki Kuranishi, Hiroshi Takuma

Proceedings Volume 1225, (1990) https://doi.org/10.1117/12.18476

KEYWORDS: Absorption, Amplifiers, Pulsed laser operation, Picosecond phenomena, Optical amplifiers, Gas lasers, High power lasers, Bioalcohols, Photons, Transmittance

Read Abstract +

Proceedings Article | 1 June 1990 Paper

Paper

Ab initio calculations on electronic states of ionic rubidium fluoride excimer

Ken-ichi Ueda, Xing Da, Hiroshi Takuma

Proceedings Volume 1225, (1990) https://doi.org/10.1117/12.18481

KEYWORDS: Excimers, Rubidium, High power lasers, Gas lasers, Fluorine, Excimer lasers, Spectroscopy, Vacuum ultraviolet, Extreme ultraviolet, Ions

Read Abstract +

Showing 5 of 57 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 26 January 2005

High-Power Lasers and Applications III

Conference Committee Involvement (7)

Fiber Lasers V: Technology, Systems, and Applications

21 January 2008 | San Jose, California, United States

Fiber Lasers IV: Technology, Systems, and Applications

22 January 2007 | San Jose, California, United States

Fiber Lasers III: Technology, Systems, and Applications

23 January 2006 | San Jose, California, United States

Fiber Lasers II: Technology, Systems, and Applications

24 January 2005 | San Jose, California, United States

High-Power Lasers and Applications III

8 November 2004 | Beijing, China

Showing 5 of 7 Conference Committees

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement