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Compact InGaAsP/lnP laser diodes with integrated mode expander for efficient coupling to flat-ended singlemode fibres

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3 Author(s)
T. Brenner ; Inst. of Quantum Electron., Swiss Federal Inst. of Technol., Zurich, Switzerland ; R. Hess ; H. Melchior

Semiconductor lasers with short integrated mode expanders for efficient coupling to flat-ended singlemode fibres are presented. Laser-to-fibre coupling efficiencies of -3 dB. An improvement of 7 dB compared with conventional laser diodes, have been achieved. Simultaneously, the lateral alignment tolerances, for a dB reduction of the coupling efficiency have been relaxed to ±1.8 μm

Published in:

Electronics Letters  (Volume:31 ,  Issue: 17 )