Multi-pass cell structure light pulse spectrum shape consistency regulation compression method and system

By acquiring wavelength-resolved spatial complex optical field data after multi-pass cell nonlinear spectral broadening, a spectral overlap index V is established. This solves the problem in existing technologies where the spatial consistency of the spectral shape of structured light pulses during multi-pass cell nonlinear spectral broadening cannot be quantitatively evaluated, and achieves efficient control of optical field spatial uniformity and improvement of output pulse quality.

CN122418409APending Publication Date: 2026-07-17CHINA JILIANG UNIV
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Patent Information

Application Number
CN202610524071.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing multi-pass cell post-compression systems cannot effectively identify and quantify the coupling behavior of structured light pulses in the spatial and wavelength dimensions, resulting in significant differences in pulse quality after compression and failing to achieve efficient coherent superposition and high peak power.

Method used

By acquiring wavelength-resolved spatial complex optical field data after nonlinear spectral broadening of a multi-pass cell, a spectral overlap index V is established. Feedback is then used to adjust input and system parameters to achieve optimized control of spectral spatial consistency.

Benefits of technology

This invention achieves efficient dispersion compensation and compression of structured light pulses, outputting compressed pulses with target spectral width, high spectral spatial consistency, and high peak power, thereby improving the stability and reliability of ultrafast optics and strong field physics applications.

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Abstract

The application provides a multi-pass cell structure light pulse spectrum shape consistency regulation compression method and system. The method makes the structure light pulse multiple round trip propagation in the multi-pass cell and realizes the spectrum broadening dominated by self-phase modulation through the nonlinear medium, carries out spatial-spectrum interference measurement on the measured light after the spectrum broadening of the multi-pass cell and the dispersion compensation, restores the wavelength resolution spatial complex light field data, and establishes the evaluation index for representing the spectrum shape spatial consistency with the spectrum overlap index V. According to the evaluation index, the input structure light parameters, the multi-pass cell propagation parameters and the dispersion compensation parameters are feedback adjusted, so that the quantitative evaluation and optimization control of the structure light pulse spectrum broadening process and the compression output quality are realized, and the output pulse with the target spectrum width, the higher spectrum shape spatial consistency, the good compressibility and the higher peak power is obtained.
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