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.
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.
Zhi-Shu
ZS
Feng
Zhi-Hui
ZH
Kang
Feng-Guang
FG
Wu
Jin-Yue
JY
Gao
Yun
Y
Jiang
Hong-Zhi
HZ
Zhang
Yury M
YM
Andreev
Grigory V
GV
Lanskii
Viktor V
VV
Atuchin
Tatyana A
TA
Gavrilova
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