【摘要】 含光分路器的光纤宽带光强调制传输系统中，光端面反射会带来额外噪声，从而影响系统信噪比，本文推导信噪比公式，为解释和消除这种影响提供理论依据。实验结果与理论基本上相符。更多还原

【Abstract】 In fiber optic light-intensity modulated broadband transmission systems with optical cou-plers, reflection at fiber ends will bring out additional noise, affecting the signal-to-noise ratio(s/n) of the system. In this paPer, the equitions describing this s/n are derived, presentingthcoritical results for explainjing and surpressing this affection. Experiments accord with theo-ry basicly.更多还原