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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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Cavity-augmented frequency tripling of a continuous wave mode-locked laser

McConnell, G. and Langford, N. and Ferguson, A.I. (2001) Cavity-augmented frequency tripling of a continuous wave mode-locked laser. Journal of Physics D: Applied Physics, 34 (16). pp. 2408-2414. ISSN 0022-3727

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Abstract

We present a model and experimental investigation of a singly-resonant optical cavity to enhance the nonlinear conversion efficiency of a continuous wave mode-locked all-solid-state laser source to produce an efficient source of ultraviolet radiation. For input pulses of approximately 33 ps duration at 4.4 ns intervals, our model predicts greater than 30% conversion from fundamental to third harmonic which is particularly attractive for fundamental sources of modest average power. Experimentally, we have achieved overall optical conversion efficiencies from fundamental to third harmonic wavelength typically greater than 11%, compared with less than 0.4% in a single pass geometry. We have measured an average power of 320 mW at λ = 355 nm at picosecond pulse duration, which corresponds to a generated third harmonic average power of 0.5 W.