Checkout this article about didrectly doubling the output of a Telecom 976 laser diode through an SHG to get 488 nM blue up to 40 mW.
See " http://optics.org/optics/Articles.do...Edou2cor_02-06 "
1. I wonder why this wasn't tried before ?
2. I wonder if it's possible to step up the power levels by combining multiple laser diode outputs to pump an SHG crystal using a Star coupler in reverse ?
Any coments are welcome.
Rick