Abstract

Multiwave mixing in above-threshold semiconductor laser structures can be utilised to generate phase conjugate signals in both reflection and transmission modes. The phase conjugate reflectivities of the structures may be used to narrow the linewidth of a laser diode transmitter. This paper proposes a novel laser diode structure which is capable of direct integration with the laser transmitter and which can be configured to yield enhanced broad band phase conjugation. The device may also be operated as a stand-alone phase conjugate repeater where its phase conjugate transmission properties may be exploited to effect four-wave mixing cancellation in multi-channel optical fibre systems.

© 1995 Optical Society of America