Temporal cloak based on tunable optical delay and advance

Zhou, Miaofang; Liu, Hongjun; Sun, Qibing; Huang, Nan; Wang, Zhaolu

doi:10.1364/oe.23.006543

Cited by 16 publications

(13 citation statements)

References 33 publications

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“…Our paradigm may find practical applications in scenarios of robust digital communications 47 , 48 as well as secure communications 49 , 50 . In a practical digital communication system, the information to be transferred is usually carried by optical pulse trains.…”

Section: Resultsmentioning

confidence: 99%

High-order dynamic localization and tunable temporal cloaking in ac-electric-field driven synthetic lattices

et al. 2022

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Dynamic localization (DL) of photons, i.e., the light-motion cancellation effect arising from lattice’s quasi-energy band collapse under a synthetic ac-electric-field, provides a powerful and alternative mechanism to Anderson localization for coherent light confinement. So far only low-order DLs, corresponding to weak ac-fields, have been demonstrated using curved-waveguide lattices where the waveguide’s bending curvature plays the role of ac-field as required in original Dunlap-Kenkre model of DL. However, the inevitable bending losses pose a severe limitation for the observation of high-order DL. Here, we break the weak-field limitation by transferring lattice concepts from spatial to synthetic time dimensions using fiber-loop circuits and observe up to fifth-order DL. We find that high-order DLs possess superior localization and robustness against random noise over lower-order ones. As an exciting application, by judiciously combining low- and high-order DLs, we demonstrate a temporal cloaking scheme with flexible tunability both for cloak’s window size and opening time. Our work pushes DL towards high-order regimes using synthetic-lattice schemes, which may find potential applications in robust signal transmission, protection, processing, and cloaking.

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Section: Resultsmentioning

confidence: 99%

High-order dynamic localization and tunable temporal cloaking in ac-electric-field driven synthetic lattices

et al. 2022

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“…A temporal cloak scheme based on tunable optical delay and advance was proposed in Ref. 10. But the scheme proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…But the scheme proposed in Ref. 10 required four optical switches based on the quantum dot semiconductor optical amplifier-based Mach-Zehnder interferometer, eight linearly chirped fiber gratings, four phase modulators (PMs), and so on, which made the scheme so complicated. Based on the Fourier analysis method, the approach realizing temporal cloak with and without the time gap was proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Periodically poled lithium niobate-based scheme for optical signal temporal cloak and encryption in the optical physical layer

Zhao

Gan

et al. 2023

Opt. Eng.

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Based on periodically poled lithium niobate, a scheme for optical signal temporal cloak and encryption in the optical physical layer is proposed and numerically studied, in which the amplitude and phase information of the symbols to be sent are detected and transmitted while that of all other symbols will be hidden from the receiver. Meanwhile, the phase and amplitude of the symbols that are not hidden can be encrypted according to arbitrary encryption rules in the optical physical layer. The simulation results show that there is almost no ripple in the cloak time window, which makes the performance of temporal cloak quite well. The output signals with high Q factor can be obtained when the linewidths of the tunable lasers are <300 kHz. Two simple encryption rules are designed, 43.75% of binary codes will be misinterpreted by eavesdropper if the signal is encrypted with such two rules in the demonstration.

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“…In resent years, temporal cloak has been widely studied both theoretically and experimentally [1][2][3][4][5][6][7][8][9][10]. It is an analogy with spatial cloak [11] from the space-time duality associated with diffraction and dispersion [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…To solve this shortcoming, a temporal cloak is reported with the new capability not only to hide optical data, but also to concurrently transmit it along another wavelength channel for subsequent readout, masking the information from one observer while directing it to another [8]. Another temporal cloak based on tunable optical delay and advance is theoretically proposed by using an optical data stream as the probe light instead of continuous wave, creating a temporal gap of 39 ps [10]. In this system, the event occurs in the gap can be transmitted as a useful message to the receiver.…”

Section: Introductionmentioning

confidence: 99%

Tunable temporal gap based on simultaneous fast and slow light in electro-optic photonic crystals

Li¹,

Chen²,

Jiang³

et al. 2015

Opt. Express

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We demonstrated a tunable temporal gap based on simultaneous fast and slow light in electro-optic photonic crystals. The light experiences an anomalous dispersion near the transmission center and a normal dispersion away from the center, where it can be accelerated and slowed down, respectively. We also obtained the switch between fast and slow light by adjusting the external electric filed. The observed largest temporal gap is 541 ps, which is crucial in practical event operation inside the gap. The results offer a new solution for temporal cloak.

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Temporal cloak based on tunable optical delay and advance

Cited by 16 publications

References 33 publications

High-order dynamic localization and tunable temporal cloaking in ac-electric-field driven synthetic lattices

High-order dynamic localization and tunable temporal cloaking in ac-electric-field driven synthetic lattices

Periodically poled lithium niobate-based scheme for optical signal temporal cloak and encryption in the optical physical layer

Tunable temporal gap based on simultaneous fast and slow light in electro-optic photonic crystals

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