CPC H04B 10/50575 (2013.01) [G02F 1/0123 (2013.01)] | 6 Claims |
1. An optical transmitter comprising:
a light source configured to output a light;
a first optical modulator configured to modulate the light and output a first modulated optical signal;
a DC component detector configured to detect a DC component of the first modulated optical signal; and
a controller configured to apply a first specific bias voltage, identified using the DC component, to the first optical modulator,
wherein the controller is configured to identify the first specific bias voltage using a variance amount of the DC component of a modulated optical signal generated by each of a plurality of bias voltages,
wherein the controller is configured to change values of a bias voltage corresponding to a modulated optical signal having the variance amount of the DC component above a first threshold within a predetermined range,
wherein the controller is configured to replace the values of the bias voltage corresponding to the modulated optical signal having the variance amount of the DC component above a second threshold, and
wherein the second threshold is bigger than the first threshold.
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