Laser modulation system

The present invention belongs to the laser modulation technology, and especially relates to a laser frequency and power modulation system. A laser modulation system of the present invention comprises an acoustic optical modulator, a voltage controlled attenuation module, a digital phase-locked loop, a sequential control module, a radio frequency switch, a photoelectric detector, a servo circuit and a spectroscope; wherein the voltage controlled attenuation module, the radio frequency switch, the acoustic optical modulator, the spectroscope, the photoelectric detector and the servo circuit are arranged in order to form a closed loop, one output of the sequential control module is directly connected with the radio frequency switch, and the other output of the sequential control module is connected with the digital phase-locked loop, while the digital phase-locked loop is connected with the voltage controlled attenuation module; in addition, the acoustic optical modulator not only receives a radio frequency sign