300 mW of coherent light at 488 nm using a generic approach

Emir Karamehmedovic, Christian Pedersen, Martin Thalbitzer Andersen, Peter Tidemand-Lichtenberg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

We present a generic approach for efficient generation of CW light with a predetermined wavelength within the visible or UV spectrum. Based on sum-frequency generation (SFG), the circulating intra-cavity field of a high-finesse diode pumped CW solid-state laser (DPSSL) and the output from a tapered, single-frequency external cavity diode laser (ECDL) are mixed inside a 10 mm periodically poled KTP crystal (pp-KTP). The pp-KTP is situated inside the DPSSL cavity to enhance conversion efficiency of the nonlinear mixing process. This approach combines different solid state technologies; the tuneability of ECDLs, the high intra-cavity field of DPSSLs and flexible quasi phase matching in pp-KTP. We demonstrate the potential of the proposed method by synthesizing a beam at 488 run using a single-frequency tapered ECDL with a center wavelength of 766 run in combination with a high finesse Nd:YVO4 laser at 1342 nm. Up to 308 mW of light at 488nm was measured in our experiments. The conversion of the ECDL beam was up to 47% after it was transmitted through a PM fiber, and up to 32% without fiber coupling. Replacing the seed laser and the nonlinear crystal makes it possible to generate light at virtually any desired wavelength within the visible spectrum.
Original languageEnglish
Title of host publicationNonlinear frequency generation and conversion: materials, devices, applications VII
Number of pages422
Volume6875
PublisherSPIE - International Society for Optical Engineering
Publication date2008
Pages87512-87512
ISBN (Print)08-19-47050-8
DOIs
Publication statusPublished - 2008
EventNonlinear frequency generation and conversion: materials, devices, applications VII -
Duration: 1 Jan 2008 → …

Conference

ConferenceNonlinear frequency generation and conversion: materials, devices, applications VII
Period01/01/2008 → …

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