CHANNEL WIDTH ADJUSTING APPARATUS FOR MULTICHANNEL OPTICAL FIBER AMPLIFIED LIGHT SOURCE

摘要

PURPOSE: To provide a channel width adjusting device of a multiple-channel optical fiber amplification light source for easily optimizing a channel width while retaining a gap between channels. CONSTITUTION: A first erbium optical fiber 11 without any input of signal light generates an amplified self-emitted(ASE) noise beam and is mixed with an excitation beam that is sent from a signal beam/excitation beam mixer 21 from an excitation generation part 60 via a photocoupler 70. The mixed light passes through an optical fiber beam amplifier 40 through a photoisolator 31 and a transmission channel width changes owing to the rotation of a rotatable Fabry Perot filter 40 that can be rotated. The transmission light is amplified by a second erbium optical fiber 12 via a photoisolator 32 and is mixed with an excitation beam from an excitation light generation part 60 by a signal beam/excitation beam mixer 22 and is discharged via a photo isolator 33.