Miniature optical parametric 1064/1573 nm converter

摘要

High efficiency OPO has been designed for converting 1064μm laser radiation into eye-safe region. Conversion efficiency 56.5% and threshold energy 2 mJ (0.06 J/sm2) have been achieved at repetition rate 12.5Hz. The divergence was less than 4 mrad up to 4 thresholds. With 180 mJ pump energy this converter can produce 70mJ output with efficiency 41% and low divergence at repetition rate 2.5 Hz.