Design and characterization of a traveling wave semiconductor cascade laser

Stavros Iezekiel; H. H. Hashim

doi:10.1117/12.548954

1 September 2004 Design and characterization of a traveling wave semiconductor cascade laser

Stavros Iezekiel, H. H. Hashim

Proceedings Volume 5466, Microwave and Terahertz Photonics; (2004) https://doi.org/10.1117/12.548954
Event: Photonics Europe, 2004, Strasbourg, France

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.

Citation Download Citation

Stavros Iezekiel and H. H. Hashim "Design and characterization of a traveling wave semiconductor cascade laser", Proc. SPIE 5466, Microwave and Terahertz Photonics, (1 September 2004); https://doi.org/10.1117/12.548954

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