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Proceedings Paper

Chirp reduction and bandwidth enhancement for direct current modulation in an optically injected semiconductor laser
Author(s): Sheng-Kwang Hwang; Yuichiro Okajima; Jiaming Liu
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Paper Abstract

A directly modulated semiconductor laser when subject to optical injection locking is experimentally investigated. The modulation bandwidth is observed to increase when the laser is injection-locked to an external optical signal. It enhances with increasing injection strength and positively increasing detuning frequency. A more than three fold of bandwidth enhancement is observed experimentally. The frequency chirping is observed to reduce in the injection-locked laser system. It reduces significantly at low modulation frequency and increases with modulation frequency, approaching to that of the laser in free-running condition at high modulation frequency. More importantly, simultaneous bandwidth enhancement and chirp reduction is experimentally achieved.

Paper Details

Date Published: 12 June 2002
PDF: 8 pages
Proc. SPIE 4646, Physics and Simulation of Optoelectronic Devices X, (12 June 2002); doi: 10.1117/12.470549
Show Author Affiliations
Sheng-Kwang Hwang, Univ. of California/Los Angeles (United States)
Yuichiro Okajima, Univ. of California/Los Angeles (United States)
Jiaming Liu, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 4646:
Physics and Simulation of Optoelectronic Devices X
Peter Blood; Marek Osinski; Yasuhiko Arakawa, Editor(s)

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