Multiwatt-power highly-coherent compact single-frequency tunable vertical-external-cavity-surface-emitting-semiconductor-laser

Optics Express
A LaurainA Garnache

Abstract

We demonstrate high power (2.1W) low noise single frequency operation of a tunable compact verical-external-cavity surface-emitting- laser exhibiting a high beam quality. We took advantage of thermal lens-based stability to develop a short (3-10 mm) plano-plano external cavity without any intracavity filter. The semiconductor structure emitting at 1microm is optically pumped by a 8W commercial 808 nm multimode diode laser at large incidence angle. For heat management purpose the GaAs-based VECSEL membrane was bonded on a SiC substrate. We measured a low divergence quasi-circular TEM00 beam (M2 = 1.2) close to diffraction limit, with a linear light polarization (>30 dB).We simulated the steady state laser beam of this unstable cavity using Fresnel diffraction. The side mode suppression ratio is > 45 dB. The free running laser linewidth is 37 kHz limited by pump induced thermal fluctuations. Thanks to this high-Q external cavity approach, the frequency noise is low and the dynamics is in the relaxation-oscillation-free regime, exhibiting low intensity noise (< 0.1%), with a cutoff frequency approximately 41MHz above which the shot noise level is reached. The key parameters limiting the laser power and coherence are studied. This ...Continue Reading

References

Sep 30, 2005·Optics Letters·Hans LindbergMartin Strassner
Nov 1, 2004·Optics Express·Richard AbramAllister Ferguson

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Citations

Sep 3, 2016·The Review of Scientific Instruments·P ČermákA Garnache
Aug 15, 2014·Optics Letters·Antti RantamäkiOleg G Okhotnikov
Feb 8, 2013·Optics Express·Antti RantamäkiOleg G Okhotnikov
Sep 10, 2020·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Hayden WisniewskiFelipe Guzmán
Aug 14, 2013·Optics Letters·David PabœufJennifer E Hastie
Sep 16, 2015·Optics Letters·M SellahiA Garnache
Nov 25, 2018·Optics Express·Grégory GredatHui Liu
Sep 7, 2019·Physical Review Letters·C SchelteS V Gurevich

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