Abstract
A new structure for a 1.3 /spl mu/m-wave length beam-expander integrated ridge-waveguide laser is demonstrated that does not require a regrowth step. A narrow beam divergence of 5.4/spl deg/ (lateral) and 18.9/spl deg/ (vertical) enables a laser diode to be coupled to a cleaved singlemode fibre with an efficiency as high as 33% with a 1 dB alignment tolerance of /spl plusmn/2.4 /spl mu/m laterally and +1.5 /spl mu/m vertically. >
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