Review of Faraday Isolators for Kilowatt Average Power Lasers

Author

Snetkov, Ilya L. ; Voitovich, Alexander V. ; Palashov, Oleg V. ; Khazanov, Efim A.

Author_Institution

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

Volume

50

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

434

Lastpage

443

Abstract

Faraday isolators for high average power lasers operating at room temperature are surveyed. Three devices on [001] oriented TGG crystals with the most known optical schemes are considered: traditional scheme, and schemes with compensation of thermally induced depolarization inside magnetic field and outside magnetic field. We report a unique 30-mm-aperture Faraday isolator with thermally induced depolarization compensation inside magnetic field. It provides 33.5-dB isolation ratio at 1.5-kW average laser power.

Keywords

Faraday effect; light polarisation; magneto-optical devices; optical isolators; reviews; thermo-optical effects; TGG crystal orientation; aperture Faraday isolator; gain 33.5 dB; kilowatt average power lasers; magnetic field; optical schemes; power 1.5 kW; size 30 mm; temperature 293 K to 298 K; thermally induced depolarization compensation; Crystals; Faraday effect; Lenses; Magnetic fields; Optical polarization; Power lasers; Thermal lensing; Faraday effect; depolarization and thermal lens compensation; optical isolators; thermooptic effects;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2014.2317231

Filename

6797889