A laser adjusting method and correspond device

Abstract

A laser adjusting method comprise an oscillator, a broadener, an amplifier, a grating pair compressor and a dispersion adjust component. That adjusting method comprises the following steps: 2, adjustthat group delay dispersion of the femtosecond pulse by the dispersion adjusting part; And step 3, judging whether the grating in the grating pair compressor is parallel or not according to the position of the electron beam with the change of the group delay dispersion. The laser adjustment of the invention does not change the original optical path, does not need to be exposed to the external environment, and the method is simple and reliable.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a laser adjustment method and a corresponding device, in particular to an adjustment method of a grating pair in a laser compressor. Background technique [0002] Since the advent of ultra-intense ultra-short pulses, the interaction between strong-field lasers and matter has greatly promoted people's understanding of nature and the rapid development of multidisciplinary. Theoretically, ultra-high laser energies can generate up to terawatts (10 12 Watts, Tera-Watt, referred to as TW) level of extremely high peak power. However, in order to obtain laser pulses with extremely high peak power, it is first necessary to compress the laser pulses into ultrashort pulses. Currently, the pulse peak power obtained by compression using the chirped pulse amplification technique (CPA) can reach petawatts (10 15 Watt, Peta-Watt, referred to as PW) level. [0003] The CPA amplific...

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Problems solved by technology

However, these methods avoid a key problem, that is, the compressor is in a high vacuum environment all year round. The previous technology needs to open the compressor to expose it to the atmospheric environment, which will have a certain impact on the cleanliness of the grating pair. influences

Moreover, there are many steps involved in these judgments and adjustments and the optical components involved, the error is bound to be large, and the parallel accuracy of the grating pair is difficult to be guaranteed.

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