The transmission quality of DWDM system is affected by the damages from linear and nonlinear effects so the ratio of optical signal to noise is reduced and the bit error rate is increased.
DWDM系统的传输质量受到线性和非线性两类效应引起的损害影响，导致光信号噪声比下降，误码率增大。
A synthetical equation about optical fiber nonlinear effects in WDM transmission system is proposed. A supplementary splitstep Fourier method to solve the equation is proposed too.
提出了一种WDM传输系统中光纤非线性效应的综合表达式，并提出了相应的算法——扩展的傅里叶算法。
Reliability of the transmission-type optical smoke detectors is affected by sensitivity of optical components to parasitic effects, especially to temperature.
传导型光学烟雾探测器的可靠性会受到光学元件寄生效应灵敏度的影响，特别是温度。
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