We demonstrate a silicon TO switch based on photonic crystal nanobeam cavity with doped-silicon heaters. The insertion loss and crosstalk are less than 2.01 dB and -9.78 dB, respectively. The thermo-optic tuning effic...
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In this paper, optical forward error correction using recirculating frequency shifter is proposed and investigated. The optical and in-the-fly process leads to great potential for low latency and high-speed optical co...
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The computational spectropolarimeter is demonstrated for the first time using speckle patterns obtained from a multi-mode fiber, with 100-pm spectral resolution, 30-nm bandwidth and a polarization measurement error of...
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Amplified spontaneous emission (ASE) noise with inherent quantum nature is promising for true random number generator (TRNG) and secure key generation and distribution (SKGD). A high-speed TRNG and a physical-layer SK...
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Integrated sensing and communication (ISAC) technology is essential for supporting vehicular networks. However, the communication channel in this scenario exhibits time variations, and the potential targets may move r...
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It has been widely recognized that placing cloud data centers near clean energy sources or in cooler environments may reduce the operational cost and carbon footprint. But when the scale of the system, in terms of the...
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A convolution neural network is proposed to reconstruct the true value from phase-wrapped interferometric sensing signals. The MAE and RMSE in a real phase dataset sampled by DAS are 0.069 p and 0.352 p respectively. ...
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We demonstrated a highly compact Yb-doped fiber laser frequency comb bonded on fused silica bricks with GHz mode spacing. The repetition rate and the carrier-envelop offset frequency were stabilized to radio-frequency...
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Recently,holographic multiple-input multiple-output(HMIMO)has motivated its potential use to support high-capacity data transmission with spatially quasi-continuous *** a practical instance of HMIMO,reconfigurable ref...
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Recently,holographic multiple-input multiple-output(HMIMO)has motivated its potential use to support high-capacity data transmission with spatially quasi-continuous *** a practical instance of HMIMO,reconfigurable refractive surfaces(RRSs)equipped with numerous metamaterial elements are utilized as antennas by refracting incident signals from signal *** this paper,we investigate a multi-user communication system with an RRS deployed as the base station(BS)’s transmit *** mitigate the high overhead of accurate channel state information(CSI)acquisition,the codebook design and beam training are employed to perform *** the large scale of RRS,users are likely to be randomly distributed in both the near and far fields around the BS,which is unknown in *** considering radiation characteristics in both fields,a near-far field codebook is designed to be applicable to all users,regardless of their *** reduce overhead,a multi-user beam training is proposed to serve all users simultaneously by enhancing each codeword capable of covering multiple *** a general case that includes users in both fields,simulation results indicate that,without prior knowledge of user distribution,the proposed scheme outperforms state-of-the-art ones in terms of sum rate and overhead.
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