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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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

Agate, B. and Kemp, A. and Brown, C.T.A. and Keller, U. and Sibbett, W. (2002) Efficient, high-repetition rate, blue source using a compact CR:LiSAF laser. In: Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the. Institute of Electrical and Electronics Engineers Inc., pp. 338-339. ISBN 1557527067

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Abstract

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 ∼150 fs in duration at ∼865 nm. The average power is 35 mW and the repetition rate is ∼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 (KNbO3) cut for non-critical phase matching at 860 nm and 22°C.