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

Sheng-Kwang Hwang, Y. Okajima, J. M. Liu

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish
Pages (from-to)463-470
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4646
DOIs
Publication statusPublished - 2002 Jan 1
EventPhysics and Simulation of Optoelectronic Devices X - San Jose, CA, United States
Duration: 2002 Jan 212002 Jan 25

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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