Dr. Guanshi Qin Profile

Dr. Guanshi Qin

at Toyota Technological Institute

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Publications (11)

Proceedings Article | 10 May 2011 Paper

Tellurite suspended nanowire surrounded with large holes for single-mode SC and THG generations

Meisong Liao, Guanshi Qin, Xin Yan, Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 8073, 80732I (2011) https://doi.org/10.1117/12.886433

KEYWORDS: Nanofibers, Glasses, Dispersion, Light wave propagation, Cladding, Nitrogen, Femtosecond fiber lasers, Fabrication, Nanolithography, Nanowires

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Proceedings Article | 23 February 2011 Paper

Highly nonlinear tellurite microstructured fibers for broadband wavelength conversion and flattened supercontinuum generation

Guanshi Qin, Xin Yan, Chihiro Kito, Meisong Liao, Takenobu Suzuki, Atsushi Mori, Yasutake Ohishi

Proceedings Volume 7934, 79340N (2011) https://doi.org/10.1117/12.874533

KEYWORDS: Optical fibers, Supercontinuum generation, Wave propagation, Dispersion, Refractive index, Four wave mixing, Optical amplifiers, Chalcogenides, Fiber amplifiers, Optical microscopes

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Proceedings Article | 23 February 2011 Paper

Dispersion controlled tellurite microstructured fibers for supercontiuum generations pumped by picosecond and femtosecond fiber lasers

Meisong Liao, Xin Yan, Guanshi Qin, Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7934, 793414 (2011) https://doi.org/10.1117/12.873689

KEYWORDS: Optical fibers, Glasses, Dispersion, Micro optical fluidics, Picosecond phenomena, Femtosecond fiber lasers, Fiber lasers, Silica, Harmonic generation, Raw materials

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Proceedings Article | 23 February 2011 Paper

Soliton self-frequency shift in tellurite microstructured fiber

Xin Yan, Guanshi Qin, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7934, 793413 (2011) https://doi.org/10.1117/12.873670

KEYWORDS: Raman spectroscopy, Micro optical fluidics, Solitons, Glasses, Optical fibers, Structured optical fibers, Numerical simulations, Femtosecond fiber lasers, Raman scattering, Femtosecond phenomena

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Proceedings Article | 14 May 2010 Paper

The tellurite highly nonlinear microstructured fibers for THG and SC generations

Meisong Liao, Chitrarekha Chaudhari, Guanshi Qin, Xin Yan, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7714, 77140C (2010) https://doi.org/10.1117/12.854188

KEYWORDS: Optical fibers, Glasses, Dispersion, Femtosecond fiber lasers, Solitons, Visible radiation, Silica, Capillaries, Nitrogen, Neck

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Tellurite highly nonlinear microstructured fibers were fabricated by pumping a positive pressure of nitrogen gas into the holes of cane in the fiber drawing process. By adjusting the pump pressure to inflate the holes of the fiber, the microstructures were reshaped, and the chromatic dispersions were tailored. Two kinds of fiber were fabricated. One is an air-clad fiber with a 1 μm hexagonal core, which is the smallest core in this shape for the air-clad fiber. By changing the inflation pressure, the diameter ratio of holey region to core (DRHC) was changed in the range of 1-20. Fibers with DRHC of 3.5, 10, 20 were demonstrated. By increasing the DRHC, the zero dispersion wavelengths were shifted to the short wavelength and the confinement loss were decreased. Another is a complex microstructure fiber with a 1.8 μm core surrounded by four ring holes. The shape of the microstructure was reshaped so heavily by the inflation pressure that it is obviously different from the original shape in the cane. The correlations among pump pressure, hole size, surface tension and temperature gradient were investigated. The temperature gradient at the bottom of the preform's neck region was evaluated quantitatively. The chromatic dispersion of this fiber was compared with that of a step-index air-clad fiber. It was found that this fiber had a much more flattened chromatic dispersion. Supercontinuum generations were investigated by the pump of a 1557 nm femtosecond fiber laser. Intense third harmonic generations were obtained from the 1μm haxgonal core fiber. Broad and flattened spectrum was obtained from the complex microstructure fiber. This investigations show that, by using a positive pressure to reshape the microstructure and by controlling the fabrication conditions exactly, highly nonlinear soft glass fibers with desirable chromatic dispersion can be fabricated, and such fibers have interesting applications in highly nonlinear field such as THG and SC generation.

Proceedings Article | 26 February 2010 Paper

Ultraflat supercontinuum generation in an As2S3-based chalcogenide core microstructured fiber

Xin Yan, Chitrarekha Chaudhari, Guanshi Qin, Meisong Liao, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7598, 75981M (2010) https://doi.org/10.1117/12.840575

KEYWORDS: Dispersion, Chalcogenides, Cladding, Glasses, Supercontinuum generation, Refractive index, Chalcogenide glass, Nonlinear optics, Scanning probe microscopy, Structured optical fibers

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Proceedings Article | 22 April 2008 Paper

Gain flattened fiber raman amplifiers by tailoring Raman amplification bandwidth of tellurite glasses

Rajan Jose, Guanshi Qin, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 6998, 69981K (2008) https://doi.org/10.1117/12.780950

KEYWORDS: Glasses, Raman spectroscopy, Raman scattering, Fiber amplifiers, Optical amplifiers, Silica, Baryon acoustic oscillations, Polarizability, Absorption, Crystals

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Proceedings Article | 22 February 2008 Paper

Simultaneous 853 nm + 1533 nm amplification and wavelength conversion between 1533 nm and 853 nm in Er3+-doped fluoride fiber

Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 6890, 689012 (2008) https://doi.org/10.1117/12.761989

KEYWORDS: Signal processing, Optical amplifiers, Absorption, Fiber amplifiers, Fiber lasers, Upconversion, Erbium, High power fiber amplifiers, Device simulation, Semiconductor lasers

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Proceedings Article | 13 February 2008 Paper

22 dB all-fiber green amplifier using Er3+-doped fluoride fiber

Guanshi Qin, Tatsuya Yamashita, Yusuke Arai, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 6890, 68900Y (2008) https://doi.org/10.1117/12.759341

KEYWORDS: Optical amplifiers, Fiber amplifiers, Optical filters, Fiber lasers, Electronic filtering, Solids, Helium neon lasers, Upconversion, Optical simulations, Semiconductor lasers

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Proceedings Article | 5 February 2008 Paper

Tellurite glass micro-superspheres as broadband Raman resonator

Yusuke Arai, Guanshi Qin, Takenobu Suzuki, Yasutake Ohishi, Tetsuji Yano, Shuichi Shibata

Proceedings Volume 6890, 689009 (2008) https://doi.org/10.1117/12.763030

KEYWORDS: Glasses, Raman spectroscopy, Particles, Resonators, Scanning tunneling microscopy, Scanning electron microscopy, Transparency, Spherical lenses, Fiber amplifiers, Silica

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Proceedings Article | 10 September 2007 Paper

Stimulated Raman and Brillouin scattering in tellurite glasses for slow light generation

Guanshi Qin, Rajan Jose, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 6775, 67750Y (2007) https://doi.org/10.1117/12.732800

KEYWORDS: Glasses, Optical fibers, Raman spectroscopy, Slow light, Silica, Raman scattering, Refractive index, Oxides, Light scattering, Scattering

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Showing 5 of 11 publications

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