SHG in doped GaSe:In crystals.
Optical transmission range and phase matching (PM) conditions for second harmonic generation (SHG) of Er3+:YSGG and CO2 laser in indium doped GaSe:In(0.1, 1.23, 2.32 mass%) are studied in comparison with these in pure and sulfur doped GaSe:S(0.09, 0.5, 2.2, 3 mass%) crystals. No changes in transparency curve are found in GaSe crystals up to 2.32 mass% indium content, but as small change as 0.18 degrees in PM angle for 2.79 microm Er3+:YSGG laser SHG and approximately 0.06 degrees for 9.58 microm CO2 laser emission line SHG are detected. PM properties of the crystals are evaluated as a function of temperature over the range from -165 to 230 degrees C. The value of dtheta/dT, the change in PM angle with variation of temperature, is found to be very small for GaSe:In crystals. While for SHG of Er3+:YSGG laser, dtheta/dT =22"/1 degrees C only, it is as small as -4.9"/1 degrees C for that of CO2 laser radiation. Linear variation of PM angle with temperature increasing is an indicator of absence of crystals structure transformation within temperature range from -165 to 230 degrees C. Thus, application of GaSe:In solid solutions in high average power nonlinear optical systems seems to be prospective.
Feng
Zhi-Shu
ZS
Key Laboratory of Coherent Light and Atomic and Molecular Spectroscopy of Ministry of Education and College of Physics, Jilin University, 2519 Jie-Fang Road, Changchun, 130023, China.
Kang
Zhi-Hui
ZH
Wu
Feng-Guang
FG
Gao
Jin-Yue
JY
Jiang
Yun
Y
Zhang
Hong-Zhi
HZ
Andreev
Yury M
YM
Lanskii
Grigory V
GV
Atuchin
Viktor V
VV
Gavrilova
Tatyana A
TA
D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry*; D053844:Lasers, Solid-State; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D012643:Selenium / Q000737:chemistry*; D014159:Transducers
C517764:gallium selenide; D005708:Gallium; D012643:Selenium