| 摘要 |
The present invention provides an optical transmitter, an optical transmission/reception system, and a drive circuit which are capable of adjusting the linearity of output light with respect to signal intensity. An optical modulator (11) includes optical transmission paths (111, 112) in which phase modulating regions (PM11_1 to PM11_4, PM12_1 to PM12_4) are formed and through which optical signals propagate. A decoder (12) decodes an input digital signal (D[3:0]) and outputs signals (D1 to D4) corresponding to decoded values. On the basis of said signals (D1 to D4), a drive circuit (13) outputs drive signals having three or more tones to each of said phase modulating regions (PM11_1 to PM11_4, PM12_1 to PM12_4). A control circuit (14) adjusts the full-scale amplitude of each drive signal by controlling the drive circuit (13). |
