In order to achieve a high-performance 459-nm Cs cell optical frequency standard, its frequency is locked by modulation transfer spectroscopy with power stabilized using an acousto-optic modulator. The power-stabilize...
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A reconfigurable optical switch based on mode-folded phase shifter over LNOI is experimentally demonstrated with high switching efficiency of 0.6V·cm Vπ·L. The switching is intrinsically fast with channel n...
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We proposed a mode-switching based reconfigurable optical power splitter with channel number scalability covering 1, 2, 4, and 8 channels, which can be used for versatile MSA-compatible optical interconnects with mini...
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A reconfigurable optical switch based on mode-folded phase shifter over LNOI is experimentally demonstrated with high switching efficiency of 0.6V·cm Vπ·L. The switching is intrinsically fast with channel n...
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The existence of the end face reflection in the collimator lens seriously affects the performance of coherent Lidar based on phase-modulated continuous wave (PMCW). We present an algorithm to eliminate the end face re...
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optical frequency combs, characterized by high signal-to-noise ratio and fine time resolution, have made signifi-cant contributions in the field of optical time-frequency transfer towards long distance and high precis...
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We propose on-chip topological transport of quantum frequency comb (10 THz) with frequency entanglement in valley photonic crystals. Our proposal could open new avenues for high-dimensional information processing util...
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The information-carrying programmable metasurfaces have found widespread applications in communication, sensing, and other related areas. However, there is a fundamental but unresolved problem,i.e., the rigorous under...
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The information-carrying programmable metasurfaces have found widespread applications in communication, sensing, and other related areas. However, there is a fundamental but unresolved problem,i.e., the rigorous understanding of the quantization of metasurface coding. Here, we theoretically investigate the performance difference between one-bit and continuous information-encoding metasurfaces. To this end,we derive analytical representations of system responses in various cases(single-input single-output, singleinput multiple-output, and multiple-input multiple-output). We analyze the impact of one-bit coding(in contrast to continuous coding) in terms of the resulting channel cross-talk and reduction of information capacity in various representative scenarios from wireless communication and holography. Our main finding indicates that the one-bit coding yields a satisfactory performance in most practical scenarios; we also show that in many cases there are smart ways to mildly relax optimization constraints in order to reduce the performance gap between the one-bit and continuous coding. We expect that our results can provide theoretical guidance for a large variety of metasurface-assisted information systems for electromagnetic waves and other wave phenomena.
We report on the theoretical and experimental demonstration of non-Hermitian antichiral currents based on a tunable non-Hermitian Hall ladder in the synthetic frequency dimension implemented by two coupled optical rin...
We report on the theoretical and experimental demonstration of non-Hermitian antichiral currents based on a tunable non-Hermitian Hall ladder in the synthetic frequency dimension implemented by two coupled optical rin...
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