Light pulse repetition rate spectrum spreader

The invention provides a light pulse repetition rate spectrum spreader. Pulse strings arranged at equal intervals can be formed, and the number of light pulses in the time domain can be increased. The polarization rotating degree, the pumping capacity and the pumping width of a totally-reverse polarization rotating arm are amplified through regulating pulses, and the number of the output light pulses and the strength of the light pulses can be effectively controlled. Thus, the repetition frequency of seed light is further improved through light pulse amplification and frequency demultiplication, a new method is provided for production and amplification of a pulse string laser device and achievement of a high repetition frequency laser device, and development of the laser industry and the application and development of the high repetition frequency light source are facilitated.