Multi-watt 589-nm Na D<sub>2</sub>-line generation via frequency doubling of a Raman fiber amplifier: a source for LGS-assisted AO

L. Taylor; Y. Feng; D. Bonaccini Calia; W. Hackenberg

doi:10.1117/12.673087

27 June 2006 Multi-watt 589-nm Na D₂-line generation via frequency doubling of a Raman fiber amplifier: a source for LGS-assisted AO

L. Taylor, Y. Feng, D. Bonaccini Calia, W. Hackenberg

Author Affiliations +

Proceedings Volume 6272, Advances in Adaptive Optics II; 627249 (2006) https://doi.org/10.1117/12.673087
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

L. Taylor, Y. Feng, D. Bonaccini Calia, and W. Hackenberg "Multi-watt 589-nm Na D₂-line generation via frequency doubling of a Raman fiber amplifier: a source for LGS-assisted AO", Proc. SPIE 6272, Advances in Adaptive Optics II, 627249 (27 June 2006); https://doi.org/10.1117/12.673087

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