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Efficient, high-repetition rate, blue source using a compact Cr:LiSAF laser

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5 Author(s)
Agate, B. ; Sch. of Phys. & Astron., Univ. of St. Andrews, UK ; Kemp, A.J. ; Brown, C.T.A. ; Sibbett, W.
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Summary form only given. We report a compact, directly diode-pumped Cr:LiSAF laser as an alternative pump source. This laser has an electrical-to-optical efficiency in excess of 1% and produces transform-limited pulses of /spl sim/150 fs in duration at /spl sim/865 nm. The average power is 35 mW and the repetition rate is /spl sim/250 MHz, which implies modest peak powers of less than 1 kW. At these low power levels, efficient frequency doubling usually requires complex arrangements, especially if the pulse duration is to be preserved. In this paper we describe the use of a relatively thick doubling crystal in a single-pass, extra-cavity arrangement. Although the second harmonic pulses suffer temporal broadening, this represents an effective way to achieve efficient frequency conversion in a simplified configuration. The nonlinear crystal was potassium niobate (KNbO/sub 3/) cut for non-critical phase matching at 860 nm and 22/spl deg/C.

Published in:

Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the

Date of Conference:

24-24 May 2002