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A membrane external-cavity surface-emitting laser (MECSEL) with emission around 825 nm

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Original languageEnglish
Title of host publicationVertical External Cavity Surface Emitting Lasers (VECSELs) X
EditorsJennifer E. Hastie
ISBN (Electronic)9781510632905
ISBN (Print)9781510632899
Publication statusPublished - 2020
Publication typeA4 Article in a conference publication
EventVertical External Cavity Surface Emitting Lasers (VECSELs) X - San Francisco, United States
Duration: 4 Feb 20205 Feb 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceVertical External Cavity Surface Emitting Lasers (VECSELs) X
CountryUnited States
CitySan Francisco


A MECSEL emitting around 825nm is reported. With a tuning range from 807nm to 840 nm, the MECSEL extends the coverage of high beam quality semiconductor based lasers in the short 8XXnm region and opens new perspectives for scanning ground-based water-vapor differential absorption lidar. 1.4W maximum output power has been achieved at room temperature operation and at 12.5W absorbed power using a 532 nm emitting pump laser. The beam quality has been investigated by M2 measurements at different pump power. The effect from a growing pump mode and thermal lensing has been observed as the beam divergence angle decreases and the beam waist radius enlargens with increasing pump power.


  • GaInAsP, MECSEL, Semiconductor laser, Short 8XXnm region, SiC heatspreaders, Thermal lensing, VECSEL

Publication forum classification

Field of science, Statistics Finland