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 two-wave mixing experimental results of tetragonal Fe•doped KTa1−xNbxO3 have been reported, and a 7.3 cm−1 gain coefficient and 42% diffraction efficiency have been obtained.
Abstract: This letter reports the two‐wave mixing experimental results of tetragonal Fe‐doped KTa1−xNbxO3. A 7.3 cm−1 gain coefficient and 42% diffraction efficiency have been obtained. For the first time internally self‐pumped phase conjugation is being observed in this crystal. At room temperature, the conjugate reflectivity measured is 21%.
29 citations
TL;DR: In this paper, an analysis of optical phase conjugation with frequency doubling in terms of nondegenerate six-wave mixing fifth-order nonlinear susceptibility is presented, where the Bragg phase matching condition is achieved at small angles.
Abstract: We present an analysis of optical phase conjugation with frequency doubling in terms of nondegenerate six-wave mixing fifth-order nonlinear susceptibility. We show how the Bragg phase-matching condition is achieved at small angles. The process under picosecond-pulse conditions in a polydiacetylene solution pumped at two-photon resonance and probed at one-photon resonance is experimentally demonstrated. Results are discussed in terms of a one-dimensional quantum three-level system. The proximity of one- and two-photon resonance in conjugated polymers makes these polymers efficient nonlinear-optical materials for this original application. The experiment permits artifact-free measurement of the two-photon state recovery time of the red form of polydiacetylene.
29 citations
03 Dec 2015
TL;DR: In this paper, the achievable performance gain of phase conjugated twin wave applied in two polarization states and time segments with mid-link optical and digital back propagation is compared for a multicarrier transmission scheme such as orthogonal frequency division multiplexing.
Abstract: We discuss recent progress on the use of optical and digital phase conjugation techniques for nonlinearity compensation in optical fiber links. We compare the achievable performance gain of phase conjugated twin wave applied in two polarization states and time segments with mid-link optical phase conjugation and digital back propagation. For multicarrier transmission scheme such as orthogonal frequency division multiplexing, two recently proposed schemes, namely phase-conjugated pilots and phase-conjugated subcarrier coding are reviewed.
29 citations
TL;DR: The accuracy of the phase-conjugate signal produced by stimulated Brillouin scattering in a waveguide is theoretically investigated in this paper, and it is shown that this output dominates the non-phase-matching signal from stimulated BLE.
Abstract: The accuracy of the phase-conjugate signal produced by stimulated Brillouin scattering in a waveguide is theoretically investigated. Contradictions between earlier phase-conjugation theories are resolved and are shown to be due solely to differing treatments of the non-phase-matched Brillouin output. We find that this output dominates the nonconjugate signal from stimulated Brillouin scattering.
29 citations
TL;DR: In this article, the nonlinear dynamics induced in suspended nanomembranes by their clampings were studied and the nonlocal character of nonlinearity was demonstrated via intermode couplings.
Abstract: We study the nonlinear dynamics induced in suspended nanomembranes by their clampings. The nonlocal character of the nonlinearity is demonstrated via intermode couplings. We also monitor the resonator phase-space trajectory and characterize its mechanical response in the presence of a strong pump excitation. We observe a shift in the oscillation frequency and phase conjugation of the mechanical mode. Such nonlinear effects are inherent to any submicron-scale mechanical resonator and are expected to play a role in their quantum dynamics as well.
29 citations