Highly efficient continuous-wave single-pass second-harmonic generation using multicrystal scheme

Kavita Devi; S. Chaitanya Kumar; G. K. Samanta; M. Ebrahim-Zadeh

doi:10.1117/12.896173

23 August 2011 Highly efficient continuous-wave single-pass second-harmonic generation using multicrystal scheme

Kavita Devi, S. Chaitanya Kumar, G. K. Samanta, M. Ebrahim-Zadeh

Proceedings Volume 8173, Photonics 2010: Tenth International Conference on Fiber Optics and Photonics; 81730K (2011) https://doi.org/10.1117/12.896173
Event: International Conference on Fiber Optics and Photonics, 2010, Guwahati, India

Abstract

We report a simple, compact and novel implementation for single-pass second-harmonic-generation (SP-SHG) of continuous-wave laser radiation based on a cascaded multi-crystal scheme, which can provide the highest conversion efficiency at any given fundamental power. By deploying a suitable number of identical 30-mm-long MgO:sPPLT crystals in a cascade, and a 30-W cw Yb-fiber laser at 1064 nm as the fundamental source, we demonstrate SP-SHG into the green with a conversion efficiency as high as 56% in the low as well as high-power regime, providing a 5.6 W of green output for 10 W and 13 W green output for 25.1 W of input pump power. The multi-crystal scheme permits substantial increase in cw SP-SHG efficiency compared to the conventional single-crystal scheme, without compromising performance with regard to power stability and beam quality.

Citation Download Citation

Kavita Devi, S. Chaitanya Kumar, G. K. Samanta, and M. Ebrahim-Zadeh "Highly efficient continuous-wave single-pass second-harmonic generation using multicrystal scheme", Proc. SPIE 8173, Photonics 2010: Tenth International Conference on Fiber Optics and Photonics, 81730K (23 August 2011); https://doi.org/10.1117/12.896173

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