Patent ID: 6094514
Filing Date: 2000-07-25
Classification: H01S,H04B

Abstract:
A gain measuring apparatus of a multi-channel optical fiber amplifier for amplifying an input multi-channel optical signal of a predetermined wavelength range, said apparatus comprising:a plurality of optical signal sources for generating a multi-channel optical signal, the number of optical signal sources being less than the number of channels of said multi-channel optical signal, in a wavelength range of said multi-channel optical signal;a probe optical signal source for generating a probe optical signal of a wavelength of which gain is subject to measurement;an optical multiplexer for multiplexing optical signals output from said plurality of optical signal sources and said probe optical signal source;an optical amplification portion for splitting the optical signals multiplexed by said optical multiplexer in an equal ratio and passing one optical signal of the split optical signal with amplification and the other optical signal of the split optical signal without amplification; anda measuring system for respectively measuring intensities of the probe optical signal amplified at said optical amplification portion and the probe optical signal that is not amplified at said optical amplification portion.