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Title: Terbium gallium garnet ceramic-based Faraday isolator with compensation of thermally induced depolarization for high-energy pulsed lasers with kilowatt average power

A scalable aperture Faraday isolator for high-energy pulsed lasers with kW-level average power was demonstrated using terbium gallium garnet ceramics with water cooling and compensation of thermally induced depolarization in a magnetic field. An isolation ratio of 35 dB (depolarization ratio γ of 3.4 × 10{sup −4}) was experimentally observed at a maximum laser power of 740 W. By using this result, we estimated that this isolator maintains an isolation ratio of 30 dB for laser powers of up to 2.7 kW. Our results provide the solution for achieving optical isolation in high-energy (100 J to kJ) laser systems with a repetition rate greater than 10 Hz.
Authors:
 [1] ; ; ;  [2]
  1. National Institute for Fusion Science, 322-6, Oroshi-cho, Toki, Gifu 509-5292 (Japan)
  2. Institute of Applied Physics RAS, Nizhny Novgorod 603950 (Russian Federation)
Publication Date:
OSTI Identifier:
22395515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APERTURES; CERAMICS; COOLING; DEPOLARIZATION; ELECTROMAGNETIC PULSES; FARADAY METHOD; GARNETS; LASERS; MAGNETIC FIELDS; MATHEMATICAL SOLUTIONS; WATER