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

Emir Karamehmedović; Christian Pedersen; Martin T. Andersen; Peter Tidemand-Lichtenberg

doi:10.1117/12.762876

19 February 2008 300 mW of coherent light at 488 nm using a generic approach

Emir Karamehmedović, Christian Pedersen, Martin T. Andersen, Peter Tidemand-Lichtenberg

Proceedings Volume 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII; 687512 (2008) https://doi.org/10.1117/12.762876
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

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 crstal (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 filed of DPSSLs and flexible quasi phase matching in pp-tapered ECDL with a center wavelength of 766 nm 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 te 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 withing the visible spectrum.

Citation Download Citation

Emir Karamehmedović, Christian Pedersen, Martin T. Andersen, and Peter Tidemand-Lichtenberg "300 mW of coherent light at 488 nm using a generic approach", Proc. SPIE 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII, 687512 (19 February 2008); https://doi.org/10.1117/12.762876

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