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This work demonstrates a 56-Gbps 4-PAM EML-based transmission system. Using an O-band SOA to increase power budget and FFE/DFE to compensate SOA-induced ISI, 37.8-km transmission is successfully implemented with BER below the FEC limit (2 × 10−4)
The sensitivities of a Monte Carlo simulation tool (PRESTAGE) to variation of input parameters are studied. When calculating the single event upset cross-section induced by proton direct ionization, PRESTAGE calculation results significantly change with changes in the sensitive volume and passivation layer thicknesses. When calculating cross-sections induced by proton indirect ionizations, PRESTAGE...
Nanometer explosives, such as RDX, HMX and CL-20, have been produced in large scale. The SEM observations show that the prepared particles are semi-spherical at the size about 60 nm having the narrow size distributions. The nanometer explosives have the same purity and crystal form with the micron-sized explosives. Compared with the micron-sized explosives, the friction sensitivity, impact sensitivity...
Since the discovery of the third retinal photoreceptors and the spectral sensitivity curve of non-visual biological effects, people began to study on the non-visual biological effects of light sources. However, there is no a unified standard to evaluate it now. In order to solve this problem, we define two parameters, circadian efficacy KC,v and circadian irradiance EC, to analyse the effects quantitatively...
In consideration of bare Fiber Bragg Grating being fragility, an approach of polymer and copper capillary package for FBG is proposed in this paper. FBG is coated with acrylate. After second coating, FBG is packaged into a blank copper capillary. FBG can expand or contract freely without strain. The second coating protects bare FBG from damage. The comparison of the experimental results between coated...
A demodulation system for fiber Bragg grating (FBG) is designed based on distributed feedback (DFB) laser. By use of adjusting the internal temperature, wavelength tunable lasers is achieved, and utilizing the laser to realize the demodulation of FBG sensing signal. The system uses all-fiber structure, with fast response and high precision demodulation. experimental results show that the method is...
Along with the fast developing of network technology, the number of Web page and user of network search become very enormous. In order to solve the problem of inefficiency and low precision in the search that users have different demand and knowledge background, this paper presents a new text model called vocabulary semantic net which can be applied to build personalized search engine and tested with...
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