This paper describes the hybrid-construction PCB were fabricated by the FR-4 laminate and high performance low-loss prepreg to achieve lower signal crosstalk and permit lower cost.
The electronic interconnection has a few disadvantages to limit the performance of electronic system to improve, such as bandwidth limitation, system clock skew, inter-wires signal crosstalk, high power consumption and sensitivity to electromagnetic field etc.
During detection, the sensor can effectively prevent fiber-optic grating from cracking due to intense stress and eliminate signal crosstalk of the distributed fiber-optic grating sensing system by confining the expanding length of the sensitive material. The sensing system also displays fast response(less than 4 min)
It is found that the key factor influencing the modulation response of integrated light sources comes from the residual reflection at the EA facet rather than the microwave signal crosstalk.
In particular, signal crosstalk through the common chip substrate has become increasingly problematic.
Using stimulated data, it is shown that signal can be estimated with good accuracy, even when there is significant signal crosstalk in the reference input.
We find the cavity length difference between two sensors must be larger than 40m to minimize the sensor signal crosstalk.
The input control logic allows each of these cells to be examined individually without interference from signal crosstalk.
The excitation and emission filters are defined to narrow wave lengths to minimize fluorescence signal crosstalk.
A kind of fiber Bragg grating sensor with protecting equipment for the determination of leaking oil is designed and assembled through mechanical location limiting principle. During detection, the sensor can effectively prevent fiber-optic grating from cracking due to intense stress and eliminate signal crosstalk of the distributed fiber-optic grating sensing system by confining the expanding length of the sensitive material. The sensing system also displays fast response(less than 4 min)
The influence of residual facet reflection on the high-frequency response of distributed feedback semiconductor laser(DFB-LD)/electroabsorption(EA) modulator integrated light sources and its suppression are studied.To explain the peaks observed in the low frequency range of the modulation response of the integrated light sources,we measured the relative intensity noise spectra of the DFB LD and the modulation response of the EA modulator at different reverse biases.It is found that the key factor influencing...
The influence of residual facet reflection on the high-frequency response of distributed feedback semiconductor laser(DFB-LD)/electroabsorption(EA) modulator integrated light sources and its suppression are studied.To explain the peaks observed in the low frequency range of the modulation response of the integrated light sources,we measured the relative intensity noise spectra of the DFB LD and the modulation response of the EA modulator at different reverse biases.It is found that the key factor influencing the modulation response of integrated light sources comes from the residual reflection at the EA facet rather than the microwave signal crosstalk.In order to suppress the facet reflection,improved anti-reflection coating was applied to EA modulator facet,and efficient improvement in high-frequency performance has been demonstrated.
By analyzing the signal characteristics of the millimeter wave active/passive combined detector,a fast algorithm of eliminating pulse-modulated signal crosstalk to the passive signal based on shift step prediction is proposed in this paper.Emulation analysis and experiment results show that this method can be used to improve the SNR of the passive channel remarkably.This method has favorable performances,such as high speed,low cost and high realizability.
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