| 摘要 |
An optical receiver for responding to optical energy propagating in an optical fibre transmissions path (1) is detected by a reverse-biassed p-i-n diode (2) which is in series with a forward-biassed p-i-n diode (3). The junction between the two diodes is connected to the input of an amplifier (4), which feeds on auto-equalizer. The auto-equalizer includes another p-i-n diode (7) which is in series with the signal path, and is forward-biassed. Due to the associated components including resistors (9,10), the diode (7) passes the same average current as do the diodes (2,3) at the front end of the receiver. The overall effect of the third diode (7) is to provide the receiver with a substantial region in its characteristic whose frequency response is flat. |
