A corner reflector InGaAs-GaAs strained layer single quantum well coupled laser array

An InGaAs-GaAs-AlGaAs strained layer single quantum laser array with a reactive ion etched corner reflector array as its rear facet has been fabricated. The corner reflectors play a two-fold role as a highly reflective rear mirror and as a phase-locking coupler. Phase locked operation with beam widths as low as 0.64/spl deg/ are obtained at pumping currents up to 4/spl times/I/sub th/ and output powers up to 60 mW. The coupling mechanism and the benefit of the corner reflector to output performance are discussed.<
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