Title :
Measurements of thermooptic characteristics of magnetoactive glasses
Author :
Khazanov, Efim ; Andreev, N. ; Babin, Andre ; Kiselev, Alexandr ; Palashov, Oleg
Author_Institution :
Inst. of Appl. Phys., N. Novgorod, Russia
Abstract :
Summary form only given. Due to the recent increase in the average power of laser systems, the investigations of radiation depolarization caused by the photoelastic effect in Faraday isolators are becoming more important. In earlier work it was predicted that exactly this effect limits the isolation ratio in high average power laser systems, and the figure of merit /spl mu/ characterizing the magnetoactive medium in this regard was determined (the higher /spl mu/, the greater the isolation ratio and, consequently, the better the medium): /spl mu/=Vk/Q/spl alpha/ where V, /spl kappa/, /spl alpha/ are the Verde constant, the thermal conductivity, and the absorption coefficient, respectively, Q is the thermooptic constant characterizing the photoelastic effect. We measured the ratio Q/K for different magnetoactive glasses using an original technique and confirmed experimentally that exactly the photoelastic effect limits the isolation ratio in Faraday isolators at high average powers.
Keywords :
Faraday effect; absorption coefficients; magneto-optical isolators; optical glass; photoelasticity; thermal conductivity; thermo-optical effects; Faraday isolators; Verde constant; absorption coefficient; average power; figure of merit; high average power laser systems; isolation ratio; laser systems; magnetoactive glasses; magnetoactive medium; photoelastic effect; radiation depolarization; thermal conductivity; thermooptic characteristics; thermooptic constant; Bragg gratings; Glass; Nonhomogeneous media; Nonlinear optical devices; Nonlinear optics; Optical devices; Optical interferometry; Optical refraction; Optical waveguides; Refractive index;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.834504