Experimental demonstration of optical switching and routing via four-wave mixing spatial shift

Nie, Zhiqiang; Zheng, Huaibin; Zhang, Yanpeng; Zhao, Yan; Zuo, Cuicui; Chang, Hong; Xiao, Min

doi:10.1364/oe.18.000899

Cited by 13 publications

(3 citation statements)

References 13 publications

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“…Thus, microwave field which connects the lower level metastable states of four level system can switch off the probe beam propagation inside the medium. This investigation can be applicable for all optical switching and logic gates [32,37].…”

Section: Spatial Optical Switchtingmentioning

confidence: 94%

Enhancement of image resolution beyond the diffraction limit by double dark resonances

Verma

Dey

2014

Phys. Rev. A

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We show how quantum coherence effects can be used to improve the resolution and the contrast of diffraction-limited images imprinted onto a probe field. The narrow and sharp spectral features generated by double-dark resonances (DDR) are exploited to control absorption, dispersion and diffraction properties of the medium. The spatial modulated control field can produce inhomogeneous susceptibility of the medium that encodes the spatial feature of the control image to probe field in the presence of DDR. The transmission of cloned image can be enhanced by use of incoherent pump field. We find that the feature size of cloned image is four times smaller than the initial characteristic size of the control image even though the control image is completely distorted after propagation through 3 cm long Rb vapour cell. We further discuss how spatial optical switching is possible by using of induced transparency and absorption of the medium.

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Section: Spatial Optical Switchtingmentioning

confidence: 94%

Enhancement of image resolution beyond the diffraction limit by double dark resonances

Verma

Dey

2014

Phys. Rev. A

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“…In contrast, based on the feature of the energy transfer induced by FWM in multichannel transmission systems, the nonlinear FWM process also exhibits attractive advantages and promising applications in the field of optical frequency conversions. Using the transparency characteristic both in terms of modulation format and bit rate, FWM is widely applied in various functions such as wavelength conversions [22,23], logic gates [24,25], pulse generation [26], microwave technology [27,28] and optical switching [29]. According to previous reports, not only has FWM attracted much attention in many materials and devices, its effects in semiconductor lasers and amplifiers have also been extensively revealed due to enhanced nonlinear processes and more compact structures.…”

Section: Introductionmentioning

confidence: 99%

Dual-pumped nondegenerate four-wave mixing in semiconductor laser with a built-in external cavity

Qiu

Won

2017

J. Opt.

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In this paper, a semiconductor laser system consisting of a conventional multimode Fabry–Pérot laser diode with a built-in external cavity is presented and demonstrated. More than two resonance modes, whose peak levels are significantly higher than other residual modes, are simultaneously supported and output by adjusting the bias current and operating temperature of the active region. Based on this device, dual-pumped nondegenerate four-wave mixing—in which two pump waves and a single signal wave are simultaneously fed into the laser, and the injection power and wavelength of the injected pump and signal waves are changed—is observed and discussed thoroughly. The results show that while the wavelengths of pump wave A and signal wave S are kept constant, the other pump wave B jumps from about 1535 nm to 1578 nm, generating conversion signals with changed wavelengths. The achieved conversion bandwidth between the primary signal and the converted signal waves is broadly tunable in the range of several terahertz frequencies. Both the conversion efficiency and optical signal-to-noise ratio of the newly generated conversion signals are adopted to evaluate the performance of the proposed four-wave mixing process, and are strongly dependent on the wavelength and power of the injected waves. Here, the attained maximum conversion efficiency and optical signal-to-noise ratio are close to −22 dB and 15 dB, respectively.

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“…2 ) medium can be greatly modified by the strong Kerr nonlinearity [22,23]. Consequently, the phase information of the output FWM is the combination of the nonlinearityinduced phase shift φ NL and the original OAM.…”

mentioning

confidence: 99%

Propagation of optical vortices in a nonlinear atomic medium with a photonic band gap

Zhang

et al. 2017

Opt. Lett.

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We experimentally generate a vortex beam through a four-wave mixing (FWM) process after satisfying the phase-matching condition in a rubidium atomic vapor cell with a photonic band gap (PBG) structure. The observed FWM vortex can also be viewed as the reflected part of the launched probe vortex from the PBG. Further, we investigate the propagation behaviors, including the spatial shift and splitting of the probe and FWM vortices in the medium with enhanced Kerr nonlinearity induced by electromagnetically induced transparency. This Letter can be useful for better understanding and manipulating the applications involving the interactions between optical vortices and the medium.

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Experimental demonstration of optical switching and routing via four-wave mixing spatial shift

Cited by 13 publications

References 13 publications

Enhancement of image resolution beyond the diffraction limit by double dark resonances

Enhancement of image resolution beyond the diffraction limit by double dark resonances

Dual-pumped nondegenerate four-wave mixing in semiconductor laser with a built-in external cavity

Propagation of optical vortices in a nonlinear atomic medium with a photonic band gap

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