Title :
Investigation of photothermal refractive index changes in novel laser crystals by the transient gratings method
Author :
Ivakin, Eugeny V. ; Sukhadolau, Aliaksandr V. ; Filippov, Valeri V. ; Melnik, Sergey A.
Author_Institution :
Inst. of Phys., Nat. Acad. of Sci., Minsk, Belarus
Abstract :
In this report we propose to characterize Yb doped laser crystals by using light induced phase grating recorded in active slabs via spatially periodical excitation of samples. Thermal and electronic refractive index changes are considered. Thermal and piezooptical contributions to refraction are found to depend on the directions of grating vector. For anisotropic crystals they may have opposite signs and particular directions there exist with both components being mutually compensated. Electronic component of refraction is used for the difference of polarisability of ground and lasing levels calculation.
Keywords :
diffraction gratings; optical materials; photorefractive effect; photothermal effects; refractive index; solid lasers; ytterbium; Yb doped laser crystal; active slabs; anisotropic crystal; electronic refractive index; grating vector directions; laser crystal; lasing level; lifetime; light induced phase grating; light refraction; nonlinear refraction; photothermal refractive index; piezooptical contribution; polarisability; spatially periodical excitation; thermal refractive index; transient gratings method; Anisotropic magnetoresistance; Crystals; Electronic components; Gratings; Laser excitation; Laser transitions; Optical refraction; Piezooptic effects; Refractive index; Slabs;
Conference_Titel :
Advanced Optoelectronics and Lasers, 2005. Proceedings of CAOL 2005. Second International Conference on
Print_ISBN :
0-7803-9130-6
DOI :
10.1109/CAOL.2005.1553823
