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Proceedings Paper

Design and characterization of a traveling wave semiconductor cascade laser
Author(s): Stavros Iezekiel; H. H. Hashim
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Paper Abstract

A travelling wave structure (similar in concept to a distributed amplifier) has been applied to a series cascade of Fabry-Perot laser diodes. The resulting travelling wave semiconductor cascade laser demonstrates a number of advantages over both conventional single laser diodes and also simple "lumped" cascades of them. These include improved quantum efficiency, enhance intensity modulation response and also broadband, lossless impedance matching (due to the use of a distributed structure to interconnect the discrete laser diodes). A travelling wave semiconductor laser (TW-SCL) based on four Fabry-Perot laser diodes has been designed and fabricated on microstrip. Measured results show a good return loss (10 dB or more) across the modulation bandwidth (of 2 GHz). In addition, the outputs of the individual devices have been optically combined in order to measure the intensity modulation response of the TW-SCL. Measured results indicate that varying the relative phase shifts of the lasers (through different fibre lengths) can be used to modify the modulation response.

Paper Details

Date Published: 1 September 2004
PDF: 11 pages
Proc. SPIE 5466, Microwave and Terahertz Photonics, (1 September 2004); doi: 10.1117/12.548954
Show Author Affiliations
Stavros Iezekiel, Univ. of Leeds (United Kingdom)
H. H. Hashim, Univ. Brunei Darussalam (Brunei)

Published in SPIE Proceedings Vol. 5466:
Microwave and Terahertz Photonics
Andreas Stohr; Dieter Jager; Stavros Iezekiel, Editor(s)

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