Theoretical and experimental investigation on the 2.7um laser pumped ZnGeP2 optical parametric oscillator generating 4.3um laser

Hai-lin Jiang; Jin-tian Bian; Jin-song Nie; Xiao-quan Sun

doi:10.1117/12.865956

6 October 2010 Theoretical and experimental investigation on the 2.7μm laser pumped ZnGeP₂ optical parametric oscillator generating 4.3μm laser

Hai-lin Jiang, Jin-tian Bian, Jin-song Nie, Xiao-quan Sun

Author Affiliations +

Proceedings Volume 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 76551P (2010) https://doi.org/10.1117/12.865956
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

A new scheme to generate 4.3μm laser, which was based on type phase matching ZnGeP₂(ZGP) optical parametric oscillator(OPO) and pumped by 2.7μm laser, was presented in view of the extensive application of mid-infrared laser in spectroscopy, remote sensing, medicine, environmental protection and military region, especially the important application value of 2.7μm and 4.3μm laser in military. The 2.7μm laser was generated by KTP OPO, which was pumped by 1.06μm Nd:YAG laser. It was compared with other schemes such as ZGP OPO pumped by 2.7μm laser with type I phase matching and the conventional method that pumped by 2.1μm laser. The results show that the new scheme has several advantages in narrower output linewidth, smaller walkoff angle and absorption coefficient of ZGP to pump laser, wider allowance of linewidth and divergence angle of pump laser and higher conversion efficiency. It was investigated experimentally. The experimental scheme and proper parameters were presented. The effects of parameters on the threshold of ZGP OPO were analyzed. The maximal output energy of 2.7μm laser is about 4mJ, the total opticoptic conversion efficiency is about 3% and the output of 4.3μm laser was also achieved, which verified the feasibility of the new scheme.

Citation Download Citation

Hai-lin Jiang, Jin-tian Bian, Jin-song Nie, and Xiao-quan Sun "Theoretical and experimental investigation on the 2.7μm laser pumped ZnGeP₂ optical parametric oscillator generating 4.3μm laser", Proc. SPIE 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 76551P (6 October 2010); https://doi.org/10.1117/12.865956

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KEYWORDS

Optical parametric oscillators

Ferroelectric materials

Phase matching

Crystals

Mid-IR

Laser applications

Laser energy

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