Aimed at the fiber-optic gyroscope（FOG） light source driving control characteristics

a new high-precision driving control system of super-luminescent diode SLD was designed.The constant current source provides stable output current and reliable laser protection.Temperature control system based on high performance TEC controller ADN8831 has the advantage of high precision

low cost and high integration degree.It is indicated from the test result that the precision of constant current is 0.01 %

the precision of controlled temperature is above 0.005 ℃

the output light power is comparative stable in the temperature range of-40 ℃ to +70 ℃

and this system can satisfy the requirements of control precision and stability.