Double-asymmetric-structure 1.5 μ m high power laser diodes

Lauri Hallman, Boris S. Ryvkin, Eugene A. Avrutin, Antti T. Aho, Jukka Viheriälä, Mircea Guina, Juha T. Kostamovaara

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

3 Citations (Scopus)

Abstract

Design considerations for high pulsed power and brightness 1.5 μm laser emitters for laser radar applications, based on comprehensive semi-analytical theory, are presented. A strongly asymmetric waveguide design with a bulk active layer positioned very near the p-emitter interface is chosen to minimize the current-induced losses at high power while maintaining a single, broad transverse mode. Moderate to high doping of the n-side of the Optical Confinement Layer and high p-doping of the p-cladding layer are used to reduce the residual current-induced losses and the electric resistance of the structure. For pulsed room-temperature operation, short laser resonators are found to be advantageous. First experimental results are presented. An as-cleaved sample with a stripe width of90 μm and a resonator2 mm long exhibits an output power of about 18 W at a pumping current amplitude of 80 A, with 1 mm long resonators showing higher power output. Further improvements are predicted by structure optimization as well as increase in internal quantum efficiency and thermal performance.

Original languageEnglish
Title of host publicationProceedings of the 2019 IEEE High Power Diode Lasers and Systems Conference, HPD 2019 - Co-located with Photonex 2019
PublisherIEEE
Pages19-20
Number of pages2
ISBN (Electronic)9781728130972
DOIs
Publication statusPublished - 1 Oct 2019
Publication typeA4 Article in conference proceedings
EventIEEE High Power Diode Lasers and Systems Conference - Coventry, United Kingdom
Duration: 9 Oct 201910 Oct 2019

Conference

ConferenceIEEE High Power Diode Lasers and Systems Conference
Country/TerritoryUnited Kingdom
CityCoventry
Period9/10/1910/10/19

Keywords

  • efficiency
  • high power lasers
  • laser diodes
  • modelling

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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