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Injection locking of multiple laser diodes

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Abstract

Injection locking of one laser diode oscillator to another one has many applications, particularly in coherent communication systems. Injection locking has been used for FM signal amplification,1 phase modulation,2 mode stabilization,3 high data rate transmission, and FM sideband locking.4 Here we report on the locking of two slave laser (SL) diodes to different sidebands of a FM common master laser (ML) diode. A beat signal of high spectral purity is then generated by mixing the two SL outputs in a photodetector. We believe this to be the first report of the locking of more than one SL to a single ML. Sideband locking of laser diodes has application in microwave signal generation, control and stabilization of microwave oscillators, and multiplexed communication over optical fibers.

© 1983 Optical Society of America

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