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 paper, a general theory of polarization and spatial information recovery by modal dispersal and phase conjugation is presented by means of a coherency matrix formalism, applied to a system that consists of a multimode modal-scrambling fiber terminated by a conventional phase-conjugate mirror that reflects only one polarization component.
Abstract: A general theory of polarization and spatial information recovery by modal dispersal and phase conjugation is presented by means of a coherency matrix formalism. The theory is applied to a system that consists of a multimode modal-scrambling fiber terminated by a conventional phase-conjugate mirror that reflects only one polarization component. The degree of polarization and the signal-to-noise ratio of the reconstructed field are discussed as a function of input-beam launching conditions. Some experimental results are also shown for comparison with the theory.
15 citations
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TL;DR: The use of the optical phase conjugation (OPC) process for parallel digital and symbolic optical computing is described and an OPC-based ultrafast optical computing architecture is proposed.
Abstract: The use of the optical phase conjugation (OPC) process for parallel digital and symbolic optical computing is described. Using spatially encoded logic and symbolic variables, various OPC-based parallel ultrafast optical logic, symbolic as well as interconnect processors are detailed. The proposed devices are experimentally verified using picosecond pulses from a mode-locked Nd3+:YAG laser. Based on these processors, an OPC-based ultrafast optical computing architecture is proposed.
15 citations
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TL;DR: In this article, an experimental investigation of phase conjugation of two mutually incoherent laser beams in the photorefractive Bi 12 TiO 20 fiber was presented, with a response time of a few seconds at 632.8 nm with a 24 mW power HeNe laser under an alternating external electric field.
15 citations
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TL;DR: In this paper, phase conjugation driven by orthogonal pump waves in birefringent polarization-maintaining fibers is studied analytically and numerically.
Abstract: Phase conjugation driven by orthogonal pump waves in birefringent polarization-maintaining fibers is studied analytically and numerically. For typical parameters, the gain bandwidths and polarization sensitivities associated with orthogonal-pump waves are comparable to those associated with parallel-pump waves. However, the maximal gains are significantly lower.
15 citations
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TL;DR: To the best of the knowledge, this is the first demonstration of TR via linear filtering in a programmable material and faithful reversal of arbitrary pulse sequences with 6 μs duration and 10 MHz bandwidth.
Abstract: The time-reversal (TR) protocol we implement in an erbium-doped YSO crystal is based on photon echoes but avoids the storage of the signal to be processed. Unlike other approaches implying digitizing or highly dispersive optical fibers, the proposed scheme reaches the μs range and potentially offers high bandwidth, both required for RADAR applications. In this Letter, we demonstrate faithful reversal of arbitrary pulse sequences with 6 μs duration and 10 MHz bandwidth. To the best of our knowledge, this is the first demonstration of TR via linear filtering in a programmable material.
15 citations