| 摘要 |
<p>A system and method for separating a component signal having a predetermined wavelength from a signal carried over a range of wavelengths is disclosed. The system comprises a first filter for transmitting light of the predetermined wavelength. The component signal is reflected rather than transmitted. The system further comprises a second filter for transmitting light of a second predetermined wavelength. The second filter is in the transmission direction from the first filter. The component signal is reflected by the second filter. According to the system and method disclosed, the insertion loss for the component signal is lowered because the component signal is transmitted through only one filter. In addition, because the second filter reflects the component signal, the pass band is not significantly narrowed, allowing a less accurate laser to be used for generating the component signal.</p> |
