High-speed laser device driving circuit

The invention provides a high-speed laser device driving circuit which involves an input buffer stage, a signal amplification stage, an output driving stage, a laser device current source and a directly modulated laser device. The output driving stage comprises an output amplifier and a transistor, the output end of the input buffer stage is connected with the input end of the signal amplification stage, the output end of the signal amplification stage is connected with the input end of the output amplifier, the output end of the output amplifier is connected with the transistor, the transistor is a BJT transistor or an MOSFET transistor, only one laser device current source is arranged, and the laser device current source is connected between a power supply and the anode of the directly modulated laser device or connected between the cathode of the directly modulated laser device and the ground. The high-speed laser device driving circuit can be used for directly driving high-speed distributed feedback laser devices and others, and the design difficulty of an existing high-speed directly modulated laser device driving circuit is reduced.