Compensation of Thermally Induced Distortions in a GGG-Based Cryogenic Faraday Isolator

Author

Starobor, Alexey V. ; Zheleznov, Dmitry S. ; Palashov, Oleg V.

Author_Institution

Inst. of Appl. Phys., Nizhny Novgorod, Russia

Volume

48

Issue

9

fYear

2012

Firstpage

1120

Lastpage

1127

Abstract

We describe a cryogenic Faraday isolator with a gadolinium gallium garnet (GGG) crystal used for the first time as a magneto-optic element. Simultaneous compensation of thermally induced depolarization and thermal lensing using FK51 glass is demonstrated theoretically and experimentally. The temperature dependence of the ratio of thermo-optical constants P/Q is measured in the temperature range of 300-80 K for the GGG crystal and FK51 glass. The possibility of using this device at laser powers of ~20 kW is shown.

Keywords

Faraday effect; compensation; cryogenics; gadolinium compounds; garnets; magneto-optical isolators; optical distortion; optical glass; thermal lensing; FK51 glass; GGG crystal; Gd₃Ga₅O₁₂; compensation; cryogenic Faraday isolator; gadolinium gallium garnet crystal; magneto-optic element; temperature 300 K to 80 K; thermal lensing; thermally induced depolarization; thermally induced distortions; thermo-optical constants; Crystals; Glass; Laser beams; Lenses; Optical distortion; Optical polarization; Thermal lensing; Cryogenics; magneto-optical devices; optical distortion; optical isolators; optical polarization; thermo-optic effects;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2012.2204041

Filename

6214564