| 摘要 |
In an optical amplifier a signal light of a wave length lambda a is coupled with a continuous light of a wave length lambda b and amplified by an optical fiber amplifier. Then, the amplified output light is subjected to filtration to select the light of the wave length lambda a alone, so that the ASE power is reduced and the dynamic range of the optical fiber amplifier from the minimum light receipt power to the saturation after amplification can be enlarged, and, in the case that the signal light is pulse-modulated, the deterioration of the extinction ratio is minimized.
|
