72‐W vertical‐external‐cavity surface‐emitting laser with 1180‐nm emission for laser guide star adaptive optics. Issue 19 (1st September 2018)

• Record Type: Journal Article
• Authors: Kantola, E.; Penttinen, J.‐P.; Ranta, S.; Guina, M.
• Is Part Of: Electronics letters. Volume 54:Issue 19(2018)
• Page Start: 1135
• Page End: 1137
• Publication Date: 2018-09-01
• Subjects: III‐V semiconductors -- birefringence -- optical pumping -- surface emitting lasers -- laser beam applications -- laser mirrors -- indium compounds -- semiconductor lasers -- artificial guide stars -- gallium arsenide -- adaptive optics -- laser cavity resonators -- optical filters -- optical harmonic generation -- laser beams -- diamond; heatsink temperature -- high‐power operation -- sodium laser guide star adaptive optics -- high‐power optically‐pumped vertical‐external‐cavity surface‐emitting laser -- free‐running laser -- GaAs‐based gain mirror -- TEC‐cooled copper mount -- heat extraction -- birefringent filter -- frequency doubling -- power 53.0 W -- temperature 0.0 degC -- temperature 20.0 degC -- power 72.0 W -- power 19.0 W -- wavelength 1180.0 nm -- size 2 mm -- GaAs -- C; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2018.6225
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : We report a high‐power optically‐pumped vertical‐external‐cavity surface‐emitting laser emitting at around 1180 nm. The free‐running laser produced 72 W of output power at a heatsink temperature of 0°C and 53 W near room temperature (20°C). The GaAs‐based gain mirror was bonded to a 2‐mm‐thick diamond attached to a TEC‐cooled copper mount in order to enable efficient heat extraction for high‐power operation. Moreover, the spectrum of the laser was narrowed down to 0.06 nm by employing a combination of a birefringent filter and an etalon inside the cavity which yielded a maximum of 19 W at a heatsink temperature of 20°C. The demonstration opens a new perspective for the realisation of sodium laser guide star adaptive optics employing frequency doubling of 1180 nm radiation.