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Proceedings Paper

Reshaping and compression of picosecond optical pulses from a semiconductor diode laser by the method of spectral windowing
Author(s): Nai Zhang
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Paper Abstract

Compression of picosecond optical pulse from diode lasers has been realized by using dispersive devices such as grating pair(1), optical fiber(2) and Gires--Tournois interferometer(3). But these methods are only available for single-mOde or mode-locked chirped optical pulses. There has been no effective way to reshape and compress multi-longitudinal mode chirped optical pulses. This paper proposes the method of spectral windowing to reshape and compress multi-longitudinal mode chirped optical pulses and demonstrates it for the short optical pulses from a gain switched diode laser. It is known that strong RE modulation invoking fast gain switching is the simplest and most reliable way to generate high repetition picosecond optical pulses in diode lasers(4). But in this method multi-longitudinal mode oscillation and frequency chirping will easily occur. Especially, in the case of multi-longitudinal mode oscillation, chirping appears in each longitudinal mode, and for each longitudinal mode the band-time product is always far greater than the allowable value of transform-limited ones. This phenomenon suggests the method of spectral windowing. It can be used to filter out one of the strongest oscillating longitudinal modes, and by narrowing it, compression of optical pulses can be realized, if there exist fewer oscillating longitudinal modes.

Paper Details

Date Published: 1 July 1990
PDF: 2 pages
Proc. SPIE 1230, International Conference on Optoelectronic Science and Engineering '90, 123041 (1 July 1990); doi: 10.1117/12.2294782
Show Author Affiliations
Nai Zhang, Shanghai Normal Univ. (China)


Published in SPIE Proceedings Vol. 1230:
International Conference on Optoelectronic Science and Engineering '90
DaHeng Wang, Editor(s)

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