Injection locking of multiple semiconductor lasers to a single master laser is a promising technique for increasing the amount of coherent optical power available from this highly efficient light source. With FM sideband injection locking,1 the technique can also be used for frequency multiplexing for optical fiber communications and to generate narrowband microwave signals.2 Injection locking of a single semiconductor slave laser (SL) by a master laser (ML) has been extensively studied.3-4 Injection locking of many slave lasers, however, makes the requirements of wavelength matching between the lasers and relative frequency stability more difficult to achieve.

© 1984 Optical Society of America

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