Third harmonic generation of CO2 laser radiation in AgGaSe2 crystal

Pramana

Gopal C Bhar1³  Pathik Kumbhakar1³  C G Chao²  D V Satyanarayana¹  N S N Banerjee¹  U Nundy¹ 

[1] Centre for Advanced Technology, Indore 452 013, India$$;Anhui Institute of Optics and Fine Mechanics, China$$;Laser Laboratory, Physics Department, Burdwan University, Burdwan 713 104, India$$

关键词: Nonlinear optical material;    third harmonic generation;    AgGaSe2 crystal.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Generation of third harmonic of CO2 laser radiation has been obtained in a type-II, 𝜃=57° cut 9 mm thick AgGaSe2 crystal for the first time by sum-frequency-mixing of the fundamental with its second harmonic, the latter being obtained using another type-I, 𝜃=55° cut 11 mm thick AgGaSe2 crystal. The energy conversion efficiencies obtained for second harmonic and third harmonic generations are 6.3% and 2.4% respectively with the input fundamental pump power density of 5.9 MW/cm2 only. The wavelength of the fundamental CO2 laser radiation used for the generation of harmonics is 10.6 𝜇m, 𝑃(20) line. A compact TEA CO2 laser source has been built in the laboratory.

【 授权许可】

Unknown