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Modulation bandwidth, noise, and stability of a semiconductor laser subject to strong injection locking

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4 Author(s)
Liu, J.M. ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Chen, H.F. ; Meng, X.J. ; Simpson, T.B.

Operating conditions for modulation bandwidth enhancement, noise reduction, and stable locking to be simultaneously fulfilled in a semiconductor laser subject to strong optical injection are investigated. When the strength of the injection signal is fixed, the optimum detuning of the injection frequency exists as a tradeoff between bandwidth enhancement and noise reduction. When the laser is injection-locked at a given value of frequency detuning in the stable locking region, both bandwidth enhancement and noise reduction are improved as the injection parameter is increased over a wide range.

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Photonics Technology Letters, IEEE  (Volume:9 ,  Issue: 10 )