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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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Journal ArticleDOI
TL;DR: Calculations demonstrate thatphase conjugation in NH3 is sensitive to absorption and that there is a dip in the phase conjugate efficiency on resonance, caused by Doppler broadening.
Abstract: We compare theoretical calculations with experimental data for phase conjugation via degenerate four-wave mixing processes in NH3. The theory is based on a quantum-mechanical rotovibrational model of ammonia that includes molecular absorption. Calculations demonstrate that phase conjugation in NH3 is sensitive to absorption and that there is a dip in the phase conjugate efficiency on resonance, caused by Doppler broadening. Calculated efficiencies are in order-of-magnitude agreement with the experimental ones.

14 citations

Journal ArticleDOI
TL;DR: The need for improvements such as increased sensitivity and lower optical scattering in photorefractive crystals is pointed out in this article, where some of their applications including optical image processing, distortion correction and interferometry are described.

14 citations

Journal ArticleDOI
TL;DR: In this article, a sinusoidal phase-modulating Fizeau interlerometer using a BaTiO 3 self-pumped phase conjugator is constructed to measure surface profiles of objects with a high accuracy.
Abstract: A sinusoidal phase-modulating Fizeau interlerometer using a BaTiO 3 self-pumped phase conjugator is constructed to measure surface profiles of objects with a high accuracy. An object field is formed on a surface of a glass plate where the object wave interferes with its phase conjugate wave. Because the size of the glass plate can be much smaller than that of the object, the sinusoidal phase modulation by vibrating the glass plate is easy and accurate for measurements of the surface profiles of large-diameter objects. The interferometer is self-referencing and free of the phase fluctuations of the object wave caused by spatially uniform movements of objects. The usefulness of the interferometer is made clear through the surface profile measurements of a diamond-turned aluminum disk and mirror.

14 citations

Journal ArticleDOI
TL;DR: A new type of phase conjugation between counterpropagating beams in photorefractive materials based on diffraction from transmission gratings only is proposed, which may occur spontaneously, with no external seeding, even with wide (frequency) band light sources.
Abstract: We propose and analyze a new type of phase conjugation between counterpropagating beams in photorefractive materials based on diffraction from transmission gratings only. This effect does not require temporal coherence between the counterpropagating beams and may occur spontaneously, with no external seeding, even with wide (frequency) band light sources.

14 citations

Journal ArticleDOI
TL;DR: In this paper, the authors demonstrate simultaneous compensation of loss and chromatic dispersion for 10-Gb/s transmission over 90-km of standard fiber using mid-span phase conjugation with a fiber-optic parametric amplifier that provides 9.4dB gain over a bandwidth of 17 nm.
Abstract: We demonstrate simultaneous compensation of loss and chromatic dispersion for 10-Gb/s transmission over 90-km of standard fiber using mid-span phase conjugation with a fiber-optic parametric amplifier that provides 9.4-dB gain over a bandwidth of 17 nm. The observed power penalty is less than 1.5 dB (at BER < 10−9) relative to back-to-back measurements. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 503–505, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20350

14 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237
202214
202125
202049
201948
201853