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Blue light generated by intra-cavity frequency doubling of an edge-emitting diode laser with a periodically poled
Kang Li1, Aiyun Yao, N J Copner
1Faculty of Advanced Technology, University of Glamorgan, Pontypridd, UK. kli@glam.ac.uk
Optics Express
|December 10, 2009
Abstract:
We demonstrate for the first time to our knowledge intra-cavity frequency doubling (ICFD) of an edge-emitter diode laser using a 10 mm-long 5.0 microm periodically poled LiNbO(3) (PPLN) crystal. An optical output power of 33 mW second harmonic blue light at 490.5 nm is generated at 1.0 A injection current, equivalent to an overall wall-plug efficiency of 1.8%. The measured M(2) values of blue beam are 1.7 and 2.4 along the fast and slow axis.
