Light pulse repetition rate spectrum spreader

Abstract

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.

Description

technical field [0001] The invention belongs to the field of laser technology, in particular to an optical pulse repetition frequency expander. Background technique [0002] Due to the limitations of the size of the optical elements and the response time of the modulating device, the traditional mode-locking technology is difficult to achieve a repetition rate of GHz. Moreover, the system structure of this method is complex, and the ultrashort laser pulse width and repetition rate cannot be easily changed. Especially in the regenerative amplifier, in order to obtain the output of multiple pulses, the length of the regenerative cavity has to be increased, resulting in a large volume of the entire laser and low stability. [0003] A multi-pulse beam generator disclosed in US patent specification US8367968B2 uses two lasers. Through the system setting, the pulses output synchronously by the two lasers can be delayed and adjusted, and the two delayed pulses can be selected by u...

AI Technical Summary

Problems solved by technology

The structure and system are greatly simplified, but the optical fiber is too long, the optical path difference is too large, and the optical pulse output with high repetition rate cannot be obtained.

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