| 摘要 |
<p>A system and method are disclosed for monitoring input signal power for an optical amplifier without disturbing the input signal. In one embodiment, a small part of the output signal (114) is split off and then bandpass filtered to provide a bandpass signal with energy that is attributable only to amplified spontaneous radiation (ASE) generated within the optical amplifier. The power in the bandpass signal is measured by an optical detector (314). Then, using the measured bandpass signal power and a one-to-one correlation between bandpass signal power and input signal power, a controller (316) estimates the input signal power value that corresponds to the measured bandpass signal power.</p> |
