We propose a simple fiber-optic sensing technology for real-time multiplexed monitoring the methane concentration based on optical coherence domain reflectometry by synthesis of optical coherence function, and demonst...
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We propose and experimentally demonstrate a new scheme for orthogonal frequency division multiplexing (OFDM) sidelobe suppression by inserting sidelobe suppression prefix (SSP) ahead of cyclic prefix (CP). The feasibi...
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Graphene has strong electro-optic effect which can be used to enhance the modulation efficiency of nanoscale photonic circuit. This paper describes recent developments for nearinfrared electro-optic modulator based on...
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By transferring 1.0-nm gold coated CVD monolayer graphene onto the well-polished surface of D-shape fiber, we achieved a graphene in-line polarizer with high polarization extinction ratio of 27 dB, low insertion loss ...
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Quantum coherence stemming from the superposition behaviour of a particle beyond the classical realm, serves as one of the most fundamental features in quantum mechanics. The wave-particle duality phenomenon, which sh...
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Heterogeneous networks (HetNets), in which small cells are ultra-densely deployed within a macro cell, is widely regarded as a {1. solution to mobile traffic offloading. However, this kind of traffic offloading is con...
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ISBN:
(纸本)9781467364300
Heterogeneous networks (HetNets), in which small cells are ultra-densely deployed within a macro cell, is widely regarded as a {1. solution to mobile traffic offloading. However, this kind of traffic offloading is confronted by two challenges. Firstly, the number of users in any small cell is really limited due to the larger power gap between macros and small cells in HetNets. In return, this phenomenon may degrade traffic offloading performance. Secondly, spectrum efficiency may be deteriorated since uplink channel states are not involved in the conventional cell attachment strategies. To address these challenges, we propose a best-fit cell attachment where downlink and uplink are decoupled and attached to cells independently. Specifically, in this paper, we conceive best-fit strategies for down-link and uplink cell attachment, for taking into account of both channel quality and cell load. And then, their implementation issues in different scenarios are discussed in detail. System-level simulation results demonstrated that our proposal can effectively offload traffic from macros to small cells, and improve data rates for cell-edge users significantly.
We experimentally demonstrate Nyquist superchannel transmission of 51.Gb/s (81.;64.4Gb/s) PDM-1.8QAM over single span of 1.0 km SSMF, using backward Raman amplification at the receiver-side. We achieve a record dis...
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We experimentally demonstrate Nyquist superchannel transmission of 51.Gb/s (8×64.4Gb/s) PDM-1.8QAM over single span of 1.0 km SSMF, using backward Raman amplification at the receiver-side. We achieve a record distance of unrepeatered transmission for the spectral efficiency (SE) as high as 1..31./s/Hz.
We experimentally demonstrate Nyquist superchannel transmission of 447 Gb/s (81.;55.97Gb/s) PDM-64QAM over single span of 1.0 km SSMF with backward Raman amplification. We achieve a record distance of unrepeatered ...
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We experimentally demonstrate Nyquist superchannel transmission of 447 Gb/s (8×55.97Gb/s) PDM-64QAM over single span of 1.0 km SSMF with backward Raman amplification. We achieve a record distance of unrepeatered transmission for the spectral efficiency (SE) as high as 8.95b/s/Hz.
We propose a model to analyze the frequency chirp of directly modulated distributed Bragg reflector (DBR) laser by evaluating the carrier dynamics in DBR. Due to the opposite sign of chirp in the gain and phase sectio...
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ISBN:
(纸本)9781467378819
We propose a model to analyze the frequency chirp of directly modulated distributed Bragg reflector (DBR) laser by evaluating the carrier dynamics in DBR. Due to the opposite sign of chirp in the gain and phase sections, the chirp compensation is achieved by injecting simultaneously injecting the data signals into both of the phase and gain sections in DBR laser. The simulation shows that, the overall chirp can be fully compensated, while the residual chirp at the rising and falling edges is only ~2 GHz. Moreover, the corresponding spectrum linewidth is significantly compressed after effective chirp compensation.
We propose to produce five-partite entanglement via cascaded four-wave mixing in a high-Q microresonator that may become a key to future one-way quantum computation on chip. A theoretical model is presented for the un...
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We propose to produce five-partite entanglement via cascaded four-wave mixing in a high-Q microresonator that may become a key to future one-way quantum computation on chip. A theoretical model is presented for the underlying continuous-variable entanglement among the generated comb modes that is expansible to more complicated scenarios. We analyze the entanglement condition when the van Loock and Furusawa criteria are violated and discuss the device parameters for potential experimental realization that may be utilized to build an integrated compact five-partite entanglement generator. The proposed approach exhibits great potential for future large-scale integrated full {1. quantum computation on chip.
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