Effect of Non-Resonant Gain Structure Design in Membrane External-Cavity Surface-Emitting Lasers

Philipp Tatar-Mathes, Hoy My Phung, Aaron Rogers, Patrik Rajala, Sanna Ranta, Mircea Guina, Hermann Kahle

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The operation of a semiconductor membrane external-cavity surface-emitting laser (MECSEL) employing a gain membrane with a cavity design, which is non-resonant regarding the two semiconductor-heat-spreader interfaces, is presented. The MECSEL delivers watt-level output power, in line with state-of-the-art results. The study provides new evidence that the design criteria of a MECSEL gain region are significantly relaxed compared to active regions employing distributed Bragg reflectors, for which the field distribution is set by the Bragg condition leading to tight tolerances for positioning of the emitting quantum structures. The study has relevance especially for the development of mode-locked MECSELs by minimizing the impact of defective Fabry-Pérot micro-cavity effects due to reflections between the semiconductor gain structure and the two heat-spreader elements placed on each side of the semiconductor membrane.

Original languageEnglish
Pages (from-to)657-659
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number12
Publication statusPublished - 15 Jun 2023
Publication typeA1 Journal article-refereed


  • non-resonant
  • vertical emitter

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

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


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