Title :
Temperature-tuned type-2 90/spl deg/ phase-matched SHG of CO/sub 2/ laser radiation at 9.2714-10.5910 /spl mu/m in CdGe(As/sub 1-x/P/sub x/)/sub 2/
Author :
Kato, Kazuhiko ; Takaoka, E. ; Umemura, N. ; Chonan, T.
Author_Institution :
Fac. of Photonics Sci., Chitose Inst. of Sci. & Technol., Hokkaido, Japan
Abstract :
Summary form only given. Reports what is believed to be the first 90/spl deg/ phase-matched second-harmonic generation (SHG) of CO/sub 2/ laser radiation in the 9.2714-10.5910 /spl mu/m range. We achieved this result by temperature tuning of a CdGe(As/sub 1-x/P/sub x/)/sub 2/ crystal with a P/sub 2/ molar concentration of x=0 241/spl plusmn/0 002. A type-2 (/spl theta/=90/spl deg/, /spl phi/=90/spl deg/) cut CdGe(As/sub 1-x/P/sub x/)/sub 2/ crystal used in the experiment had dimensions of 5/spl times/5/spl times/7 mm/sup 3/. The crystal is transparent from 17 to 18.1 /spl mu/m with a small dip around 14.3 /spl mu/m corresponding to the two-phonon cutoff in CdGeP/sub 2/ at 13.5 /spl mu/m. Using the TEA CO/sub 2/ laser tuned to 10.2466 and 10.5910 /spl mu/m, we first measured the phase-matching angles and acceptance angles of this composite crystal.
Keywords :
cadmium compounds; carbon compounds; gas lasers; germanium compounds; laser beams; laser tuning; optical harmonic generation; optical materials; optical phase matching; optical tuning; phonon-phonon interactions; ternary semiconductors; transparency; 10.2466 mum; 10.591 mum; 13.5 mum; 14.3 mum; 17 mum to 18.1 mm; 9.2714 to 10.591 mum; CO/sub 2/; CO/sub 2/ laser radiation; CdGe(As/sub 1-x/P/sub x/)/sub 2/ crystal; CdGe(AsP)/sub 2/; CdGeP/sub 2/; P/sub 2/ molar concentration; TEA CO/sub 2/ laser; acceptance angles; composite crystal; phase-matched second harmonic generation; phase-matching angle; temperature tuning; transparency; two-phonon cutoff; type-2 cut crystal; Electron optics; Frequency conversion; Nonlinear optics; Optical frequency conversion; Optical harmonic generation; Optical pumping; Optical waveguides; Performance evaluation; Propagation losses; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on
Conference_Location :
Nice
Print_ISBN :
0-7803-6319-1
DOI :
10.1109/CLEOE.2000.910227
