Laser signal transmission system

A laser signal transmission system, comprising:

• a modulation module, connected to an input voltage and configured to modulate the input voltage and output a first voltage, wherein an average value of the first voltage within a first duration is 0, and the first duration is greater than or equal to one modulation period;
• a voltage-current conversion module, connected to the modulation module and configured to output a first current based on the first voltage;
• an electro-optic conversion module, connected to the voltage-current conversion module and configured to output an optical signal corresponding to the first current, wherein the optical signal is transmitted over an analog optical fiber;
• an optic-electro conversion module, configured to receive the optical signal from the analog optical fiber and output a second voltage based on the optical signal;
• and
• a control module, connected to the optic-electro conversion module and configured to determine an average value of the second voltage and determine an electro-optic conversion coefficient of the electro-optic conversion module based on the average value of the second voltage;
• wherein the optic-electro conversion module is further configured to output a third voltage corresponding to the optical signal, and amplify the third voltage and output the second voltage;
• and
• the control module is further configured to receive a reference voltage, and adjust a magnification at which the third voltage is amplified by the optic-electro conversion module until it is determined that the reference voltage is equal to the average value of the second voltage.