Laser transmission circuit, laser transmission component and electronic measuring instrument

A laser transmission circuit, comprising:

• an analog emission unit;
• an analog receiving unit;
• and
• a digital feedback path, wherein:
• an input end of the analog emission unit is configured to access an input analog signal, convert the input analog signal into an analog laser signal, and emit the analog laser signal;
• the analog receiving unit is configured to receive the analog laser signal emitted by the analog emission unit, and convert the analog laser signal into an analog electrical signal as an output signal of the laser transmission circuit;
• an input end of the digital feedback path is connected to an output end of the analog receiving unit, an output end of the digital feedback path is connected to a feedback input end of the analog emission unit;
• the digital feedback path is configured to access the analog electrical signal output by the analog receiving unit, convert the analog electrical signal into a digital signal, and transmit the digital signal;
• and
• the digital feedback path is further configured to convert the transmitted digital signal into a low-frequency analog signal, and output the low-frequency analog signal to the feedback input end of the analog emission unit.