0.5W CW single frequency blue at 486 nm via SHG with net conversion of 81.5% from the NIR using a 30mm PPMgO:SLT crystal in a resonant cavity

Ali Khademian; Shilpa Jadhav; David Shiner

doi:10.1117/12.2077307

27 February 2015 0.5W CW single frequency blue at 486 nm via SHG with net conversion of 81.5% from the NIR using a 30mm PPMgO:SLT crystal in a resonant cavity

Ali Khademian, Shilpa Jadhav, David Shiner

Author Affiliations +

Proceedings Volume 9347, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV; 93470C (2015) https://doi.org/10.1117/12.2077307
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

A single frequency fiber Bragg grating (FBG) stabilized laser at 972 nm is coupled into a doubling ring cavity with an optical length of 138 mm, a 91% input coupler, a 30 mm long Brewster cut magnesium doped periodically poled lithium tantalate (PPMgO:SLT) crystal and a high reflector. The cavity buildup is 37 and loss is 0.63%. The cavity is monitored, controlled and locked with a single chip processor. With IR power of 572 mW in the input fiber, 466 mW blue output is obtained, giving 81.5% net efficiency. The blue and IR beams are separated by refraction at the crystal’s Brewster surface with negligible loss and without the need for dichroic optics.

Citation Download Citation

Ali Khademian, Shilpa Jadhav, and David Shiner "0.5W CW single frequency blue at 486 nm via SHG with net conversion of 81.5% from the NIR using a 30mm PPMgO:SLT crystal in a resonant cavity", Proc. SPIE 9347, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV, 93470C (27 February 2015); https://doi.org/10.1117/12.2077307

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KEYWORDS

Crystals

Fiber Bragg gratings

Reflectivity

Polarization

Laser crystals

Mirrors

Semiconductor lasers

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