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Title: Optical phase conjugation by four-wave mixing in Nd:YAG laser oscillator for optical energy transfer to a remote target

A self-starting phase conjugator was designed for optical energy transfer to a remote target. Saturable-gain four-wave mixing in a laser resonator was achieved using a flash-lamp pumped Nd:YAG crystal and phase-conjugate light (PCL) generation were verified. Wavefront correction experimentation revealed that beam wander caused by air turbulence is compensated. Tracking capability was demonstrated in the range of 9 mrad with tracking accuracy of ±0.04 mrad. The maximum field of view was measured to be 4.7°. Dependence of phase-conjugate light energy on reference light energy was investigated. The maximum output of 320 mJ was obtained. The temporal behavior of PCL is discussed based on the four-wave mixing mechanism. Unlike a conventional loop resonator type phase conjugator, this system is applicable for wireless energy transfer to a remote target.
Authors:
;  [1] ;  [2]
  1. Department of Advanced Energy, The University of Tokyo, Chiba 277-8561 (Japan)
  2. Department of Physics, Graduate School of Natural Sciences, International Christian University, Tokyo 181-8585 (Japan)
Publication Date:
OSTI Identifier:
22413150
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 8; Other Information: (c) 2015 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; CORRECTIONS; CRYSTALS; ENERGY TRANSFER; FREQUENCY MIXING; GAIN; LIGHT BULBS; NEODYMIUM LASERS; OSCILLATORS; RESONATORS; TURBULENCE; VISIBLE RADIATION