光源谱宽通过光纤色散对AOCS输出的影响

Effect of the Spectral Width of Optical Sources upon the Output of an Active Optical Current Sensor by Fiber Dispersion

基于光纤色散引起的脉冲展宽效应，在理论和实验上研究了有源光学电流传感器（AOCS）中宽带光源对系统输出的影响．理论结果表明：对于长度为500m的光纤，当光源谱宽在40—60nm之间变化时，多模光纤传输下的脉冲展宽范围在0．5～0．8ns，单模光纤传输下的脉冲展宽范围在2×10^-5～4×10^-5，信号衰减量对系统输出影响很小，且随光源谱宽的增加而有微弱的增加，实验与理论相符合．

For Active optical current sensor, the effect of broadband light sources on pulse broadening caused by fiber dispersion has been theoretically investigated and simulated. The results show that when the spectra width of light sources varies between 40 - 60 nm, the pulse broadening of muhimode fiber with length of 500 m and single-mode fiber varies between 0. 5 -0. 8 ns and 2 × 10^-5- 4 × 10^-5 ns, respectively. Finally, our experimental resuits verify the above conclusions.