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Opt Lett. 2009 Jan 15;34(2):217-9.

Second-harmonic-generation microsystem light source at 488 nm for Raman spectroscopy.

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  • 1Ferdinand-Braun-Institut fur Hochstfrequenztechnik, Berlin, Germany.


A microsystem excitation light source emitting at 488 nm is presented. A direct single-pass nonlinear frequency conversion using a diode laser emission at 976 nm and a periodically poled lithium niobate waveguide crystal for efficient second-harmonic generation is demonstrated. This was realized on a micro-optical bench with a combined thermal management and a footprint of (25 mm x 5 mm). At 217 mW fundamental power a generated power of 56 mW at 488 nm with a conversion efficiency of 26% was achieved. With a power stability below 1%, this wavelength stabilized compact device is well suited for Raman spectroscopy.

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