| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical transmission system more appropriately coping with deterioration in transmission quality in a down stream, on the side of an optical transmitter. <P>SOLUTION: The optical transmission system is provided with: one or more optical receivers 20 each having a light receiving means 21 for converting an optical signal into an electric signal, a signal intensity detection means 25 for detecting signal intensity of the optical signal, and a control signal output means 26 for generating and outputting a first control signal C<SB>1</SB>including signal intensity information; and an optical transmitter 10 having an emission element 11 which generates the optical signal, a signal intensity information acquisition means 12 which accepts the first control signal C<SB>1</SB>from an optical receiver 20 which accepts the optical signal, a temperature detection means 13 for detecting temperature of the emission element 11 to generate a second control signal including temperature information R<SB>TEMP</SB>, a driving means for performing current control of the emission element 11 to control intensity of the optical signal based on a current control signal, and control means 12, 15 for generating the current control signal based on the signal intensity information R<SB>BIAS</SB>, R<SB>MOD</SB>. and the temperature information R<SB>TEMP</SB>. <P>COPYRIGHT: (C)2009,JPO&INPIT |
