Topic
Signal beam
About: Signal beam is a research topic. Over the lifetime, 1881 publications have been published within this topic receiving 20717 citations.
Papers published on a yearly basis
Papers
More filters
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TL;DR: This filter is particularly suitable for single-photon electromagnetically induced transparency (EIT) experiments, but can also be used in several similar applications.
Abstract: We describe a combined ultranarrow bandpass filtering setup for single-photon experiments in quantum optics. The filter is particularly suitable for single-photon electromagnetically induced transparency (EIT) experiments, but can also be used in several similar applications. A multipass planar Fabry–Perot etalon together with polarization filters and spatial filtering allows 114 dB pump beam suppression, while the signal beam is attenuated by just 4 dB, although both wavelengths are only separated by 0.025 nm (9.2 GHz). The multipass etalon alone accounts for 46 dB suppression while it has a peak transmission of 65%. We demonstrate EIT experiments in Cs vapor at room temperature with probe power in the femtowatt regime using this filter.
15 citations
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TL;DR: It is shown that the construction of the phase-conjugate signal beam by a phase conjugate of the transmitted reference beam alleviates the effects of distortions that are due to striations.
Abstract: Growth-induced striations in photorefractive media scatter transmitted light, degrading their performance in holographic applications. We model this phenomenon by considering the striations to be a permanent hologram within a medium and compare it with experimental results in a striated strontium barium niobate crystal. We show that the construction of the phase-conjugate signal beam by a phase conjugate of the transmitted reference beam alleviates the effects of distortions that are due to striations.
14 citations
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05 May 2008
TL;DR: In this article, the authors proposed an optical arrangement for generating a nonlinear optical signal on a material excited by an excitation field, where coherent fields of first and second optical pulses of different frequencies are overlapped in the material both temporally and spatially.
Abstract: The invention relates to a method and an optical arrangement (10) for generating a nonlinear optical signal (17) on a material (16) which is excited by an excitation field (2). With the excitation field, coherent fields of first and second optical pulses of different frequencies are overlapped in the material (16) both temporally and spatially. The first pulse of a first frequency is generated in a first beam (3) of a first optical generator unit (1), and the second pulse of a second frequency is generated in a second beam (8) of a second optical generator unit which is synchronously pumped by the first optical generator unit (1). With the first pulses of the first frequency as the fundamental frequency pulse (5) of a higher harmonic frequency, the same is generated, and the second optical generator unit (7) is pumped with the pulses of the higher harmonic frequency. According to the concept of the invention, the method proposes that the second optical generator unit (7), as an optical parametric generator unit, generates pulses of an idler frequency in an idler beam for producing the second pulse of the second frequency in the second beam (8), wherein the second frequency is smaller than the first frequency, and the second optical generator unit generates pulses of a signal frequency in a signal beam (9), wherein the second frequency is smaller than the signal frequency.
14 citations
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TL;DR: The use of a controlled, removable angular dispersion applied to the signal beam in a plane orthogonal to that containing the noncollinear angle is experimentally demonstrated as a technique to broaden the gain bandwidth in optical parametric chirped-pulse amplification.
Abstract: The use of a controlled, removable angular dispersion applied to the signal beam in a plane orthogonal to that containing the noncollinear angle is experimentally demonstrated as a technique to broaden the gain bandwidth in optical parametric chirped-pulse amplification. With a pump beam centered at 526 nm the supercontinuum signal is amplified in the 900 to 1220 nm range in a beta-barium borate crystal with a gain >1000. This represents a bandwidth improvement greater than 30% relative to conventional designs.
14 citations
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TL;DR: In this paper, the authors proposed a scheme to realize Quantum Memory (QM) for efficient storage of terahertz (THz) frequency signals using Electromagneticically Induced Transparency (EIT) in an ultracold atomic medium of 87Rb Rydberg atoms prepared in a Two Dimensional Magneto Optical Trap (2D-MOT).
14 citations