The output noise and signal - to - noise ratio of avalanche photodiode ( apd ) are discussed in detail 详细研究了apd探测器的输出噪声和信噪比。
A technique , based on maximizing signal to noise ratio ( snr ) of the system , has been proposed . this method includes the determination of optimum wavelength of the laser and avalanche gain of the avalanche photodiode ( apd ) ( 3 )从分布式光纤温度传感系统的实际设计出发,选取了激光器最佳工作波长,对apd的最佳雪崩增益特性进行分析,得到了使系统信噪比最大的设计结果。