硼酸锂回音壁模式谐振器中245纳米光的二次谐波产生

Second-harmonic generation of light at 245 nm in a lithium tetraborate whispering gallery resonator.

作者信息

Fürst Josef U, Buse Karsten, Breunig Ingo, Becker Petra, Liebertz Josef, Bohatý Ladislav

出版信息

Opt Lett. 2015 May 1;40(9):1932-5. doi: 10.1364/OL.40.001932.

DOI:10.1364/OL.40.001932

Abstract

A millimeter-sized, monolithic whispering gallery resonator made of a lithium tetraborate, Li2B4O7, crystal was employed for doubly resonant second-harmonic generation with a continuous-wave laser source at 490 nm. An intrinsic quality factor of 2×10(8) was observed at the pump wavelength. A conversion efficiency of 2.2% was attained with 5.9 mW of mode-matched pump power. In the lithium tetraborate resonator, it is feasible to achieve phase-matching of second-harmonic generation for pump wavelengths between 486 and 506 nm.

摘要

一个由四硼酸锂（Li2B4O7）晶体制成的毫米级整体式回音壁谐振器，被用于在490nm连续波激光源下进行双共振二次谐波产生。在泵浦波长处观察到本征品质因数为2×10(8)。在5.9mW的模式匹配泵浦功率下，转换效率达到了2.2%。在四硼酸锂谐振器中，对于486至506nm之间的泵浦波长，实现二次谐波产生的相位匹配是可行的。