Patent ID: 9564975
Date: 2017-02-07
CPC Classifications: H04B,H04J,H04L

Claim:
1. An optical transmission device comprising: a drive signal generate unit that generates a drive signal; a modulation unit that modulates an optical signal in accordance with the drive signal; a detect unit that detects a fluctuation of a signal component of the drive signal with respect to an optical signal output by the modulation unit; an input unit that inputs a component other than the signal component of the drive signal into the detect unit without the modulation unit as a reference signal; and a correct unit that corrects a parameter of the drive signal generate unit in accordance with a detect result of the detect unit so that in a voltage range of the drive signal where a non-linear characteristic of the modulation unit appears, the non-linear characteristic of the modulation unit corresponding to a voltage value of the drive signal gets closer to a linear characteristic at the voltage value, wherein: the detect unit detects the fluctuation of the signal component with use of the reference signal; the reference signal is a signal of which frequency changes with time; and the signal component is a signal that has a fixed frequency and has amplitude smaller than that of the reference signal.