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A scheme of picosecond pulse shaping using gain saturation characteristics of semiconductor laser amplifiers

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3 Author(s)
Tohyama, M. ; Dept. of Electron. Eng., Tokyo Univ., Japan ; Takahashi, R. ; Kamiya, T.

To obtain high power, well shaped picosecond pulses from gain-switched semiconductor lasers, the use of dynamic gain saturation characteristics of semiconductor laser amplifiers was investigated theoretically and experimentally. A configuration of a reflected-wave amplifier (RWA) with single-side external coupling is introduced for pulse shaping, which is found to be suitable for enhancing dynamic gain saturation. By a combination of a distributed feedback laser oscillator at 1.3 μm in wavelength and a reflected-wave amplifier of 400 μm cavity length with asymmetric facet reflectivities of 0.01% and 30%, single-mode optical pulses with almost no tailing, full width at half maximum of 15 ps, and peak power exceeding 50 mW were obtained without pulse broadening, despite the considerable tail structure of the incident pulse

Published in:

Quantum Electronics, IEEE Journal of  (Volume:27 ,  Issue: 9 )

Date of Publication:

Sep 1991

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