Title :
Frequency doubling of picosecond CO2 laser radiation with ZnGeP2 crystal
Author :
Gribenyukov, A.I. ; Korotkova, V.V. ; Pletnyev, N.V. ; Shakir, Yu.A. ; Sorochenko, V.R. ; Trofimov, A.Yu.
Author_Institution :
Inst. of Opt. Monitoring, RAS, Tomsk, Russia
Abstract :
Summary form only given. For mid IR region ZnGeP2 crystals have excellent potential for application in nonlinear optics due to unique combination of physical properties. In 1987 second harmonics generation (SHG) efficiency of 49% was realized with this crystal pumped by 2-ns pulses of CO2-laser with intensity ∼ 1GW/cm2. In the present work SHG was investigated with the ZnGeP2 crystals pumped by CO2-laser pulses with much higher radiation intensities. To prevent the crystal surface optical damage we applied the significantly shorten laser pulse duration as compared with known data. In our experiments CO2-laser system "Picasso-2" was used generating the train of pulses with duration 20 - 100 ps and total energy up to 15 J. The system provided laser intensity up to 100 GW/cm2 at the crystal samples surface ∼15 ×15 mm2. The work was supported by the Russian Fund for Basic Research (grant #03-02-16094).
Keywords :
carbon compounds; gas lasers; nonlinear optics; optical harmonic generation; optical materials; optical pulse generation; ternary semiconductors; zinc compounds; 15 J; 2 ns; 20 to 100 ps; CO2; CO2 laser radiation; SHG; ZnGeP2; ZnGeP2 crystal; crystal pumping; crystal surface optical damage; frequency doubling; laser intensity; laser pulse duration; mid IR region; nonlinear optics; second harmonics generation; Crystals; Frequency; Laser theory; Nonlinear optics; Optical harmonic generation; Optical pulse generation; Optical pulses; Optical pumping; Pump lasers; Surface emitting lasers;
Conference_Titel :
Laser and Fiber-Optical Networks Modeling, 2003. Proceedings of LFNM 2003. 5th International Workshop on
Print_ISBN :
0-7803-7709-5
DOI :
10.1109/LFNM.2003.1246110
