The output noise and signal - to - noise ratio of avalanche photodiode ( apd ) are discussed in detail 詳細研究了apd探測器的輸出噪聲和信噪比。
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 )從分布式光纖溫度傳感系統的實際設計出發,選取了激光器最佳工作波長,對apd的最佳雪崩增益特性進行分析,得到了使系統信噪比最大的設計結果。