| 摘要 |
PURPOSE:To stabilize an optical frequency of an output light from plural light sources economically with respect to the light source frequency stabilizing method of an optical frequency multiplexer having plural light sources. CONSTITUTION:The optical frequency multiplexer in which output lights from plural light sources 1-1-1-n are modulated by transmission information and multiplexed by a photocoupler 5 and sent is provided with an optical frequency reference light source 2 being an absolute reference source and an optical interferometer 3 such as a Fabry-Perot interferometer, and the interferometer 3 is calibrated so that the optical frequency of the output light from the reference light source 2 is coincident with one of transmission fringes of the optical interferometer 3 and after the optical frequency of the output light from the reference light source 2 is coincident with the optical frequency of the output light of the light source to be adjusted, the optical frequency of the output light from the light source to be adjusted is swept and its output light is made incident in the optical interferometer 3 via an optical switch or a photocoupler 6, the transmission fringe number is counted and a control section 4 controls the light source to be adjusted to obtain a desired optical frequency. |
