| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that control-processing to keep a sufficient quality of receiving signals is complicated in a coherent light receiver.SOLUTION: A coherent light receiver according to the present invention comprises: first means for outputting local oscillation light having a predetermined wavelength; second means for making inputted light signals interfere with the local oscillation light and receiving them; third means for electrically processing the light signals received by the second means; fourth means for monitoring at least one part of power of the light signals; and fifth means for controlling power of the local oscillation light outputted by the first means according to light power monitored by the fourth means. |
