| Recent years,1.5-2.0μm laser has attracted much attention for its potential applications in military, medical as well as industrial fields. There are many ways to get 1.5-2.Oμm laser, and the optical parametric oscillator (OPO) is one of most efficient ways. The OPO is one technology for frequency conversion. It has the merits of frequency tunable as well as configuration simple. So currently OPO is one of the hotspots. With the emergence of excellent nonlinear crystals, the research on OPO has made great progress. Now using the technology of OPO, researchers have successfully got laser from near infrared to middle infrared, even far infrared. In this thesis, based on the excellent nonlinear crystals GTR-KTP and KTA, we focus on the generation of 1.5-2.0μm laser with the OPO schemes. The contents of the thesis mainly include the aspects as followed:1. Introduce the development history of OPO, significance of the research on 1.5-2.0μm laser as well as the current actuality in this field.2. Introduce the basic classical theory of OPO, including the basic principal of OPO, utilizing coupled wave equations of three-wave interaction process, and theoretically analyzing the main factors that influence the output properties of OPO.3. Experimentally demonstrate the LD-end-pumped and LD-side-pumped GTR-KTP-IOPO. High power, high efficient,1.57μm eye-safe laser is demonstrated. Compared to common KTP, the advantages of GTR-KTP in OPO are analyzed.4. Experimentally demonstrate an OPO with simultaneous wavelength output at 1.7μm and 1.9μm. The central wavelength shift is observed and analyzed. |
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