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Physica Scripta

Multi-channel optical router of coexisting two- and three-mode bunching

Siqiang Zhang, Faizan Raza, Huanrong Fan, Yuan Feng, Al Imran, Kangkang Li, Yanpeng Zhang

Published Apr 15, 2019• 3 citations
Publisher

Abstract

Abstract We investigate the coexisting of two-mode and three-mode bunching in the intensity noise correlation by generating multi-order fluorescence from pseudo-thermal light source at low temperature using the Nitrogen-vacancy center in diamond. The coexisting mechanism suggests that three-mode bunching is overlapped with two-mode bunching via path indistinguishability, which can be further decomposed into multiple lower order correlation through path distinguishable offset. Moreover, the contribution from two-mode bunching in third order intensity noise correlation function is twice with respect to three-mode bunching. We demonstrate the interference among two- and three-mode bunching by controlling the time offset and dressing the slow light to realize multi-channel optical routing. Our experimental results suggest the advance technique of peak division and channel equalization ratio of about 95%, applicable to all multi-channel optical routing. The switching speed between two channels is about 20 ns.

DOI
10.1088/1402-4896/ab1925

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Abstract We investigate the coexisting of two-mode and three-mode bunching in the intensity noise correlation by generating multi-order fluorescence from pseudo-thermal light source at low temperature using the Nitrogen-vacancy center in diamond. The coexisting mechanism suggests that three-mode bunching is overlapped with two-mode bunching via path indistinguishability, which can be further decomposed into multiple lower order correlation through path distinguishable offset. Moreover, the contribution from two-mode bunching in third order intensity noise correlation function is twice with respect to three-mode bunching. We demonstrate the interference among two- and three-mode bunching by controlling the time offset and dressing the slow light to realize multi-channel optical routing. Our experimental results suggest the advance technique of peak division and channel equalization ratio of about 95%, applicable to all multi-channel optical routing. The switching speed between two channels is about 20 ns.
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Abstract Rare earth doped crystal Pr 3+ :Y 2 SiO 5 has unique features, whose nonlinear response is dynamically triggered and modulated by the interaction between dressing and phonon effect. In this article, we have demonstrated the switching from two-mode bunching to anti-bunching like phenomenon of noise intensity fluctuations used for noise correlation. Here, switching in bunching phenomenon is caused by relative nonlinear phase, which is induced by self- and cross-phase modulation. In contrast with two-mode bunching, three-mode bunching case hardly follows the switching mechanism attributed to the destructive interaction among the phases of Stokes, anti-Stokes and FL signals. We also have realized switching and routing application in two and three mode bunching. Both functions (switching and routing) are controlled by manipulating temperature of cryostat and gate delay. Our experimental results provide the novel technique for switching and channel equalization ratio of about 96%. The intensity switching speed is achieved about 17 ns.
We study an optical transistor (switch and amplifier) and router by spontaneous parametric four-wave mixing and fluorescence in diamond nitrogen-vacancy (NV) center. The routing results from three peaks of fluorescence signal in the time domain, while the switching and amplification are realized by correlation and squeezing. The intensity switching speed is about 17 ns. The optical transistor and router are controlled by the power of incident beams. Our experimental results provide that the advance technique of peak division and channel equalization ratio of about 90% are applicable to all optical switching and routing.
Fabricating electronics from solid-state quantum emitters is a promising strategy for the miniaturization and integration of electronic devices. However, the practical realization of solid-state quantum devices and circuits for signal transmission and processing at room temperature has remained challenging. Herein, we investigated the multi-bunching phenomenon by generating multi-order fluorescence from a pseudo-thermal source at room temperature using the nitrogen-vacancy (NV) center in diamond. We demonstrate the shift in time of multi-bunching by controlling the effect of dressing to realize logical gates and transistor switching operations. We also suggest the optimization of the time propagation delay (TPD) of the gate circuit by changing the boxcar gate position.
Abstract We demonstrate the second- and third-order temporal correlation of two independent pseudo-thermal fluorescence (FL) sources. The two distinguishable sources become indistinguishable following the delay in Feynman’s path. The second- and third-order correlation demonstrates the strong bunching amplitude surrounded by variable oscillations and interfering side bands (beats). Specifically, three-photon bunching is overlapped by two-photon bunching, and further decomposed into multiple lower order correlation functions. Here, the strong interference arises from source and path indistinguishable terms (varying time offset, laser frequency and the bandwidth of FL sources); The support for this idea comes from Feynman’s path integral theory and sub wavelength interference for such kind of sources with appropriate detection schemes. Such phenomena may serve as modulation and carrier for quantum communication channels.
Abstract Here we report on the damped cross-Rabi oscillations in the intensity noise correlation resulting from the destructive interference between two four-wave mixing (FWM) processes, controlled by dressing atomic coherence in a nitrogen-vacancy center in a diamond. Also, the relationship between the self-Rabi oscillation of temporal intensity and cross-Rabi oscillation is investigated at a low temperature. Additionally, we discuss the notion that cross-Rabi oscillation in correlated beams can be switched between FWM and second-order fluorescence.