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, a fast mutually pumped phase-conjugation (MPPC) was achieved in a Bi12TiO20 crystal by using transient photorefractive beam coupling under a dc electric field.
Abstract: Unusually fast mutually pumped phase-conjugation (MPPC) is achieved in a Bi12TiO20 crystal by using transient photorefractive beam coupling under a dc electric field. Pulses of phase-conjugate waves with a buildup time of 4.5 ms and a width of 50 ms at an input intensity of 2×0.8 W/cm2 are obtained after applying a rising front of external electric field to the crystal. A phase-conjugation efficiency as high as 25% of the incident light power is measured.
19 citations
TL;DR: In this article, a phase-locked conjugation of two light beams using a phase synchronizer demonstrated how phase conjugations of depolarized radiation can be used to compensate aberration and depolarization distortions in solid-state media.
Abstract: Theoretical and experimental results obtained in the study of phase-locked conjugation of two light beams using a phase synchronizer demonstrate how phase conjugation of depolarized radiation can be used to compensate aberration and depolarization distortions in solid-state media. Two-beam phase conjugation via mutual scattering of orthogonally polarized pump waves under four-wave mixing is discussed. A novel analog operation-orthogonal phase conjugation (OPC)-involving an electromagnetic field was realized with a phase synchronizer. >
19 citations
TL;DR: A feedback loop oscillator is implemented, using a BaTiO(3) crystal that provides stable high-quality phase conjugation for nanosecond pulses, with an efficiency close to the theoretical maximum.
Abstract: We implement a feedback loop oscillator, using a BaTiO3 crystal that provides stable high-quality phase conjugation for nanosecond pulses, with an efficiency close to the theoretical maximum.
19 citations
Patent•
14 Mar 1990
TL;DR: In this paper, the authors proposed a power laser generator that is characterized by the fact that it successively comprises on the same optical axis of propagation, a pilot laser beam generator to generate a laser beam wavelength, a controllable deflector, a beam separator, a laser amplifying medium with the wavelength of the pilot beam, and a phase conjugation nonlinear mirror.
Abstract: This invention relates to power laser generators in which it is possible to control the angular direction of output laser beams. The generator according to the present invention is characterized by the fact that it successively comprises on the same optical axis of propagation, a pilot laser beam generator to generate a laser beam wavelength, a controllable deflector, a beam separator, a laser amplifying medium with the wavelength of the pilot beam, and a phase conjugation nonlinear mirror. The laser generator is applicable, in particular, to missile guidance systems or in telemetry systems.
19 citations
TL;DR: It is shown that backward difference-frequency generation can be exploited to achieve phase conjugation in a second-order nonlinear medium and the backward configuration can be utilized to achieve broadband quasi-phase-matching, compared with the forward counterpart.
Abstract: We show that backward difference-frequency generation can be exploited to achieve phase conjugation in a second-order nonlinear medium. The backward configuration can be utilized to achieve broadband quasi-phase-matching, compared with the forward counterpart. Our calculation shows that a nonlinear reflectivity of close to 100% is achievable from a laser emitting an output power of ~1 mW. Such an efficient phase conjugator is made feasible by placing the nonlinear medium inside a pump laser cavity. In addition, a Fabry-Perot resonator at the input frequency is used to significantly improve the nonlinear reflectivity.
19 citations