Transmission optical fiber connected to it out connector detection method of the transmission optical fiber connected to it and an optical fiber amplifier, optical fiber amplifier and an optical fiber amplifier

摘要

PROBLEM TO BE SOLVED: To provide an optical fiber amplifier for enhancing security by correctly detecting the existence/nonexistence of the off-hook of an output side connector and to provide a method and a device for detecting connector off-hook of a transmission optical fiber connected to the optical fiber amplifier.;SOLUTION: In this optical fiber amplifier provided with an optical fiber amplifier 1 and the transmission optical fiber 14 having connectors 13 and 15 connected the output side of the optical fiber amplifier 1 and the transmission optical fiber 16 connected to the optical fiber amplifier, the optical fiber amplifier measures a reflection attenuation amount from the transmission optical fiber side to the optical fiber amplifier 1 side, compares the reflection attenuation amount with an allowable range between a first threshold larger than a preset reflection attenuation amount without connector off-hook and a second threshold smaller than the reflection attenuation amount without connection off-hook, determines that there is no connector off-hook if the measured reflection attenuation amount is within the allowable range and determines that there is connector off-hook if the reflection attenuation amount is outside the allowable range, and the method is a method for detecting connector off-hook of the transmission optical fiber connected to the optical fiber amplifier.;COPYRIGHT: (C)2005,JPO&NCIPI