Chirp reduction and bandwidth enhancement for direct current modulation in an optically injected semiconductor laser

Sheng-Kwang Hwang; Yuichiro Okajima; Jiaming Liu

doi:10.1117/12.470549

12 June 2002 Chirp reduction and bandwidth enhancement for direct current modulation in an optically injected semiconductor laser

Sheng-Kwang Hwang, Yuichiro Okajima, Jiaming Liu

Author Affiliations +

Proceedings Volume 4646, Physics and Simulation of Optoelectronic Devices X; (2002) https://doi.org/10.1117/12.470549
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

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.

Citation Download Citation

Sheng-Kwang Hwang, Yuichiro Okajima, and Jiaming Liu "Chirp reduction and bandwidth enhancement for direct current modulation in an optically injected semiconductor laser", Proc. SPIE 4646, Physics and Simulation of Optoelectronic Devices X, (12 June 2002); https://doi.org/10.1117/12.470549

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