Dr. Chitrarekha B. Chaudhari Profile

Dr. Chitrarekha B. Chaudhari

Freelance Consultant

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Author

Publications (9)

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

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 | 5 June 2010 Paper

Single and dual wavelength pumped composite chalcogenide-tellurite microstructured fiber parametric amplifier

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7728, 77281O (2010) https://doi.org/10.1117/12.854192

KEYWORDS: Composites, Dispersion, Glasses, Refractive index, Chalcogenides, Fiber amplifiers, Optical fibers, Cladding, Telecommunications, Nonlinear optics

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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 | 26 February 2010 Paper

Optical parametric amplification in composite tellurite-fluorophosphate fiber

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7598, 75981N (2010) https://doi.org/10.1117/12.840587

KEYWORDS: Dispersion, Glasses, Composites, Cladding, Refractive index, Optical fibers, Nonlinear optics, Nanofibers, Fiber amplifiers, Mid-IR

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Proceedings Article | 20 May 2009 Paper

Highly nonlinear chalcogenide core nanofiber and photonic crystal fiber showing zero dispersion at 1.55 microns

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7357, 735703 (2009) https://doi.org/10.1117/12.820426

KEYWORDS: Cladding, Dispersion, Nanofibers, Glasses, Chalcogenides, Optical fibers, Telecommunications, Refractive index, Photonic crystal fibers, Chalcogenide glass

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Proceedings Article | 25 August 2008 Paper

Chromatic dispersions in highly nonlinear glass nanofibers

Chitrarekha Chaudhari, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 7056, 70561K (2008) https://doi.org/10.1117/12.795811

KEYWORDS: Nanofibers, Dispersion, Cladding, Glasses, Chalcogenides, Refractive index, Optical fibers, Bismuth, Oxides, Borosilicate glass

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Proceedings Article | 29 August 2002 Paper

Design and fabrication of demultiplexers for DWDM applications

D. Gautam, Chitrarekha Chaudhari, L. Patil

Proceedings Volume 4905, (2002) https://doi.org/10.1117/12.480989

KEYWORDS: Waveguides, Demultiplexers, Wave propagation, Directional couplers, Silicon, Beam propagation method, Stars, Phased array optics, Fabrication, Dense wavelength division multiplexing

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Showing 5 of 9 publications

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