Potassium Titanium Oxide Phosphate (KTP) Optical Parametric Oscillator Pumped at 0.532 and 1.064mum

摘要

Optical paranetic oscillators (OPO) are attractive sources of coherent radiation in application for which laser sources are unavailable or for which wide tunability is needed. For samples, they can be used as mid-IR. countermeasure sources in military applications and can be applied into difference absorption lidar operating in the range of 2 approx 14 mu m to monitor environment, medical diagnosis and treatment material processing scientific instrument optical communication low-light imaging atmospheric aberration for astronomy and satellite tracing optical signals processing, communication and imaging in water, remote sensing and identification biological materials. Many nonlinear frequency-conversion crystals such as lib_3O_5 (LBO) KTiOPO_4 (KTP) beta-BaB_2O_4 have been used in OPO devices. KTP is one of the best nonlinear frequency-conversion crystals, and it has high nonlinear coefficient, high damage threshold, easily-polished surface, and a broad transparency range~([1,2]). So, Here, we focus our interest to KTP OPO.