Repetitively actively gain-switched strongly asymmetric waveguide laser diode for high brightness picosecond pulse generation

E. A. Avrutin, B. S. Ryvkin, J. T. Kostamovaara

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We analyse theoretically the advantages of an asymmetric waveguide structure with a large equivalent spot size for use in a repetitively gain switched laser diode. The proposed construction, which maintains a single transverse mode, with a large equivalent spot size, for an arbitrary stripe width. This allows for a large carrier density to be accumulated before the onset of the optical pulse thus making for high pulse energy and also makes for a large modal cross-section which reduces the characteristic power for gain saturation and thus helps achieve high peak pulse power as well as energy. The predicted pulse energies are up to about 0.5 nJ from a narrow stripe laser (5 μm), with promises a significant improvement in the brightness of laser radiation compared to results in the literature. The possible effect of carrier transport is considered, and recommendations on the laser design in order to minimise it are given.

Original languageEnglish
Title of host publicationICTON 2014 - 16th International Conference on Transparent Optical Networks
PublisherIEEE Computer Society
ISBN (Print)9781479956005
Publication statusPublished - 2014
Event16th International Conference on Transparent Optical Networks, ICTON 2014 - Graz, Austria
Duration: 6 Jul 201410 Jul 2014


Conference16th International Conference on Transparent Optical Networks, ICTON 2014


  • gain switching
  • nonlinear optics
  • semiconductor lasers

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