Laser capable of simultaneously outputting nanosecond pulses and pico-second pulses

Abstract

The invention discloses a laser capable of simultaneously outputting nanosecond pulses and pico-second pulses. The laser comprises a signal source, a signal isolation system and an amplifier. According to the invention, with an electric light control technology of combining an extra-cavity Pockels cell and intra-cavity Pockels cell, a regenerative amplification process is realized in case of signal light importing so as to obtain high-energy pico-second laser output, and cavity empty process is also realized in case of no signal light importing so as to obtain nanosecond pulse output; and thefree combination of the two processes can be realized according to practical application demand, and as a result, free combination of numbers of the nanosecond pulses and the pico-second pulses in a single laser is realized and is output in an alternative way. The laser provided by the invention has an important application in high-precision high-efficiency fine processing field, as well as basicresearch fields such as plasma excitation, excited state control, chemical reaction control, special radiation excitation and the like.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a laser that simultaneously outputs nanosecond and picosecond pulses. Background technique [0002] Laser beams composed of nanosecond and picosecond pulses have important applications in the field of high-precision material processing. This laser can simultaneously combine the advantages of picosecond and nanosecond pulses to complete the material processing process. The heat-affected zone of picosecond laser processing is small, and the pulse width is less than 10 ps. The etching and ablation effect of the laser directly sublimating the material is dominant, and the "cold processing" effect without obvious heat-affected zone will be obtained. It belongs to the category of cold processing laser, but the etching efficiency is relatively low Low, greatly increasing the processing time; nanosecond pulses can achieve high-efficiency processing, but due to the wide pulse width, severe...

AI Technical Summary

Problems solved by technology

However, this kind of laser belongs to electro-optic Q technology, and the obtained pulse widths are nanoseconds and microseconds respectively. It does not belong to the category of ultrafast lasers and is not suitable for high-precision processing applications.

Images