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在设计光通讯系统时,要考虑的光谱噪声基本有两种:热噪声(亦称琼生噪声)和量子噪声(亦称散粒效应噪声)。热噪声来自探测系统内的负荷电阻和放大器(主要在前端);量子噪声来自探测系统内、外两个部分。在内部产生的量子噪声是由暗电流引起的。由外源产生的量子噪声与入射于
There are basically two types of spectral noise to consider when designing an optical communication system: thermal noise (also known as Joan noise) and quantum noise (also known as shot noise). Thermal noise comes from the load resistance and amplifier in the detection system (mainly at the front end); the quantum noise comes from both the inner and outer parts of the detection system. The internally generated quantum noise is caused by dark current. Quantum noise generated by exogenous sources is incident on