Temperature-tuned noncritically phase-matched frequency conversion in LiB 3O 5 crystal

Abstract

The new nonlinear crystal of lithium triborate, LiB 3O 5 (LBO), was investigated for frequency doubling and mixing of 1064 nm, 1135 nm and 1908 nm operated at the noncritically phase-matched (NCPM) temperatures of 149°C (for doubling 1064 nm), 77.4°C (for doubling 1135 nm), 112°C (mixing 1064 and 1135 nm) and 81°C (mixing 1064 and 1908 nm). The temperature tuning curves (from 0°C to 150°C), angular and temperature bandwidths are measured and compared with the calculated values.