| 摘要 |
A reflective star coupler for a distributed switch optical network for narrow band and broad band broadcast communication comprises one port (20a) terminated in a reflective surface or device (22), a signal amplifier (24) and/or filter is disposed in the path between the port (20a) and the reflective device (22) to reintroduce the light from that port into the coupler in an amplifier state or selectively according to wavelength. The amplifying device may be a semiconductor laser having a reflective coating on one face thereof. |
