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Progress in VECSEL technology for laser guide stars

Research output: Other conference contributionPaper, poster or abstractScientific

Details

Original languageEnglish
Publication statusPublished - 2019
Publication typeNot Eligible
EventThe 13th Annual Workshop on Laser Technology and Systems for Adaptive Optics - Québec, Canada
Duration: 7 Jun 20198 Jun 2019
http://l4ao.lbto.org/index.html

Conference

ConferenceThe 13th Annual Workshop on Laser Technology and Systems for Adaptive Optics
CountryCanada
CityQuébec
Period7/06/198/06/19
Internet address

Abstract

VECSELs (vertical cavity surface emitting lasers) have recently emerged as an attractive laser platform for generating high-brightness visible radiation [1]. In particular, VECSELs can be used to generate high power beams at yellow wavelength range [2], making it attractive for adaptive optics on earth-based telescopes. Their key advantages include ability to reach power levels of more than 10 W in fundamental transversal mode, low-noise single frequency operation, relatively broad wavelength tuning, and simpler and more compact architectures compared to alternative frequency converted solid-state laser systems used to generate visible radiation.
We review progress in developing VECSEL technology with fundamental emission at 1180 nm and steps towards frequency doubled single-frequency systems at 590 nm range. The key enabling technology is the gain mirror, which has reached a maturity level suitable for generating more than 70 W at 1180 nm, with optical efficiencies in the range of 30% [3]. We then introduce a compact package laser system enabling single frequency operation with 100 kHz linewidth at infrared and locking to external reference system. Finally, we presented recent development steps towards demonstrating advanced intracavity converted VECSEL-based guide star lasers.