Temperature control device for optical modulators, and optical link device including same

A device configured to control a temperature of an optical modulator comprising a heater, the device comprising:

• a processor configured to:
• obtain an optimal heater control value at which optical modulation amplitude (OMA) of the optical modulator is maximized;
• control the heater using the optimal heater control value;
• input a third input signal to the optical modulator to set a third output signal corresponding to the third input signal as a reference value;
• and
• feedback-control the optimal heater control value so that a fourth output signal corresponding to a fourth input signal input to the optical modulator corresponds to the reference value.

An optical link device comprising:

• a laser configured to output a first optical signal;
• an optical transmitter configured to receive the first optical signal output by the laser and transmit a modulated second optical signal;
• an optical receiver configured to receive the modulated second optical signal from the optical transmitter and restore data included in the modulated second optical signal to perform an optical link;
• and
• an optical fiber portion between the optical transmitter and the optical receiver to transmit the modulated second optical signal from the optical transmitter to the optical receiver,
• wherein the optical transmitter comprises:
• an optical modulator comprising a heater and configured to modulate the first optical signal into the modulated second optical signal comprising the data;
• and
• a temperature control device configured to:
• obtain an optimal heater control value at which optical modulation amplitude (OMA) of the optical modulator is maximized;
• control the heater using the optimal heater control value;
• input a third input signal to the optical modulator to set a third output signal corresponding to the third input signal as a reference value;
• and
• feedback-control the heater control value so that a fourth output signal corresponding to a fourth input signal input to the optical modulator corresponds to the reference value.