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Your search keyword '"Hong-Ky Nguyen"' showing total 4 results
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4 results on '"Hong-Ky Nguyen"'

1. Reliable high-power 1060 nm DBR lasers for second-harmonic generation

Author

Hong Ky Nguyen, Jun., Kechang Song, Yabo Li, Chung-En Zah, R.W. Davis, Martin H. Hu, Nick Visovsky, and Sean Coleman

Subjects
Physics, business.industry, Second-harmonic generation, Nonlinear optics, Heat sink, Green-light, Laser, law.invention, Power (physics), Semiconductor laser theory, Optics, Distributed Bragg reflector laser, law, Optoelectronics, Electrical and Electronic Engineering, business
Abstract

Highly reliable 1060 nm DBR lasers are reported with a single-wavelength output power greater than 350 mW and a failure rate as low as 1.7 kFITs, at a heatsink temperature of 25 C and a gain current of 500 mA. The green-light power of up to 184 mW has been generated by frequency doubling of these DBR lasers.

Published
2007

2. Measurement of intrinsic dynamics of SOA using outband optical modulation

Author

Hong Ky Nguyen, Xingsheng Liu, Martin H. Hu, Nick Visovsky, Nobuhiko Nishiyama, Herve P. LeBlanc, Chung-En Zah, and Catherine Caneau

Subjects
Optical amplifier, Physics, Optics, business.industry, Modulation, Computer Science::Software Engineering, Optoelectronics, Carrier lifetime, Electrical and Electronic Engineering, business, behavioral disciplines and activities, Transmission function
Abstract

A parasitic-free technique using outband optical modulation for measuring a semiconductor optical amplifier's (SOA's) dynamic response is proposed. It is demonstrated that a counter-propagating scheme is useful in measuring the carrier lifetimes and the response obtained with a co-propagating scheme includes the transmission function of an SOA.

Published
2004

3. Wavelength and power stabilisation of uncooled 975 nm thick quantum well lasers over 110°C temperature range

Author

Hong Ky Nguyen, Martin H. Hu, Yabo Li, Xingsheng Liu, Chung-En Zah, Nick Visovsky, Kechang Song, and Rajaram Bhat

Subjects
Materials science, Laser diode, business.industry, Atmospheric temperature range, Laser, Power (physics), law.invention, Wavelength, Optics, Fiber Bragg grating, law, Optoelectronics, Electrical and Electronic Engineering, business, Quantum well
Abstract

The use of a thick quantum well enables coherence-collapse operation of a Bragg grating stabilised laser diode over 110°C temperature range, yielding 975 nm wavelength emission with >40 dB sidemode suppression ratio

Published
2004

4. Dual-thermistor temperature control for semiconductor lasers

Author

Hong Ky Nguyen, Xingsheng V. Liu, Chung-En Zah, and Martin H. Hu

Subjects
Materials science, Laser diode, business.industry, Thermistor, Far-infrared laser, Semiconductor laser theory, Vertical-cavity surface-emitting laser, law.invention, law, Diode-pumped solid-state laser, Optoelectronics, Junction temperature, Electrical and Electronic Engineering, business, Tunable laser
Abstract

A technique using two thermistors for maintaining junction temperature of a laser diode over a wide current range is proposed. The wavelength of a 980 nm module was stabilised within 1 nm with this technique from 25 to 400 mA. compared to a wavelength shift of 5 nm with traditional one-thermistor control.

Published
2003

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