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Proceedings Paper

Multi-watt 589-nm Na D2-line generation via frequency doubling of a Raman fiber amplifier: a source for LGS-assisted AO
Author(s): L. Taylor; Y. Feng; D. Bonaccini Calia; W. Hackenberg
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Paper Abstract

We develop a novel solid state fibre laser system, AFIRE, for the purposes of laser guidestar (LGS) assisted adaptive optics (AO), based on the second harmonic generation (SHG) from a high-power (P1178 ~25W) CW narrowband (Δυ < 3GHz) Raman fibre amplifier developed by IPF. We present what we believe to be the highest power, narrowband single-pass CW 589nm SHG result reported to date, P589 ~ 4.2W from P1178 ~ 19W (ηVIS > 22%). We demonstrate our understanding of the arising absorption-induced thermal effects (namely, dephasing and degradation of the conversion), offer predictions towards higher powers and conversion levels, and show that our current results are essentially pump-power limited. We are confident of the scalability of both the IR and visible parts of our system, to these higher output powers and conversion efficiencies.

Paper Details

Date Published: 27 June 2006
PDF: 9 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 627249 (27 June 2006); doi: 10.1117/12.673087
Show Author Affiliations
L. Taylor, European Southern Observatory (Germany)
Y. Feng, European Southern Observatory (Germany)
D. Bonaccini Calia, European Southern Observatory (Germany)
W. Hackenberg, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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