Topic
Phase conjugation
About: Phase conjugation is a research topic. Over the lifetime, 3694 publications have been published within this topic receiving 49099 citations.
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TL;DR: In this article, the mutually pumped phase-conjugation process in photorefractive media with partially coherent pump beams was investigated and the effects of transmission, reflection, and 2k-reflection gratings as well as the depletion of both pump beams were investigated.
Abstract: We investigate the mutually pumped phase-conjugation process in photorefractive media with partially coherent pump beams. We consider the effects of transmission, reflection, and 2k-reflection gratings as well as the depletion of both pump beams. The theoretical results can be employed to qualitatively explain the experimental observations.
12 citations
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TL;DR: A scheme for designing fiber amplifiers as SBS phase conjugators the power requirements can be decreased by orders of magnitude; yet only low coherence is required, and high fidelity is reached.
Abstract: Phase-conjugating stimulated Brillouin scattering (SBS) mirrors are frequently used to improve the brightness of solid-state lasers. With a scheme for designing fiber amplifiers as SBS phase conjugators the power requirements can be decreased by orders of magnitude; yet only low coherence is required, and high fidelity is reached. A peak power of 5 W was demonstrated to be sufficient for optical SBS phase conjugation.
12 citations
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TL;DR: In this paper, an optical phase conjugation and laser pulse compression of laser light via stimulated Brillouin scattering at high energy is investigated, and high energy SBS operation at high-energy and high average power in fluorocarbon liquids is clarified.
Abstract: An optical phase conjugation and laser pulse compression of laser light via stimulated Brillouin scattering at high energy are investigated. SBS operation at high-energy and high average power in fluorocarbon liquids is clarified. Fundamental nonlinear and SBS optics data on particle-free Fluorinert liquids are presented. High capacity SBS cells filed with particle-free Fluorinert liquids were used to demonstrate a very high energy SBS mirror in recent experiments at GEKKO XII laser facility. The pulses of energy as high as 73 Joules were phase conjugated using a SBS phase conjugating mirror. High energy SBS laser pulse compressor was operated at the level 30 Joules. Laser pulse with duration 13 ns FWHM was compressed to 0.6 ns with a high SBS internal efficiency.
12 citations
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TL;DR: A highly accurate real-time surface profile measuring system has been constructed by combining a Bi(12)SiO(20) (BSO) phase conjugating mirror (PCM) with a Twyman-Green interferometer, with quite high measurement accuracy free of aberrations of the lens and of hysteresis or aging of the piston actuator used to change the phase of the reference field.
Abstract: A highly accurate real-time surface profile measuring system has been constructed by combining a Bi12SiO20 (BSO) phase conjugating mirror (PCM) with a Twyman-Green interferometer. In this new interferometer the convex lens collects and focuses the scattering object waves in the BSO crystal, and the PCM reconstructs the object field through the same lens. The method of deriving surface profile is similar to conventional ones but differs in that it does not require exact phase modulation of the interferograms. This system features a quite high measurement accuracy free of aberrations of the lens and of hysteresis or aging of the piston actuator used to change the phase of the reference field. The principle and basic experimental results are presented.
12 citations
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22 Dec 2014TL;DR: In this article, a single-channel phase conjugation apparatus with a spatial light modulator and a single channel optical sensing and generating unit was proposed, in which the spatial modulator receives a light having a wavefront scattered by a scattering object.
Abstract: A single-channel phase conjugation apparatus includes a spatial light modulator and a single-channel optical sensing and generating unit. The spatial light modulator receives a light having a wavefront scattered by a scattering object. The single-channel optical sensing and generating unit senses a phase control wavefront of an output light focused by the spatial light modulator and outputs a light having a phase conjugation wavefront by changing a direction of the output light in a reverse direction depending on the phase control wavefront.
12 citations