Narrow-beam 1.3 /spl mu/m superluminescent diode with butt-jointed selectively grown spot-size converter

摘要

A narrow-beam superluminescent diode (SLD) has been developed using a butt-jointed selectively grown spot-size converter and a newly designed absorption region. High output power and low spectral modulation have been achieved. The far field patterns for both the horizontal and vertical direction were as narrow as 10/spl deg/. The coupling efficiency of the output power into a flat-ended singlemode fibre (4 /spl mu/m spot size) was as high as -1.9 dB without lenses.