Intelligent spatiotemporal mode-locked fiber laser and control method

By employing momentum space random modulation and intelligent feedback control through an all-fiber momentum space modulation device, the problem of accurate control of spatial mode field distribution in spatiotemporally mode-locked fiber lasers was solved, achieving stable output and low loss of high-energy ultrashort pulses.

CN116191190BActive Publication Date: 2026-04-07PENG CHENG LAB
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Patent Information

Application Number
CN202310156088.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-14
Publication Date
2026-04-07
Estimated Expiration
2043-02-14

AI Technical Summary

Technical Problem

Existing spatiotemporally mode-locked fiber lasers cannot accurately control the spatial mode field distribution, resulting in low pulse energy and high system loss.

Method used

An all-fiber momentum space modulation device is adopted, including a momentum space random control device and an intelligent feedback control device. The momentum space random control device can obtain an arbitrary mode field distribution, and the intelligent feedback control device can lock a specific mode field distribution.

Benefits of technology

It achieves precise control of the spatial mode field, obtains stable and reliable high-energy ultrashort pulse output, reduces system losses, and improves flexibility and controllability.

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Abstract

This invention discloses an intelligent spatiotemporally mode-locked fiber laser and its control method. The intelligent spatiotemporally mode-locked fiber laser includes: an all-fiber momentum space modulation device, which is used to control the spatial mode field distribution; the all-fiber momentum space modulation device includes: a momentum space random control device and an intelligent feedback control device; the momentum space random control device and the intelligent feedback control device are connected; the momentum space random control device is used to obtain an arbitrary mode field distribution in the coordinate space of the multimode fiber; the intelligent feedback control device is used to obtain a specific mode field distribution in the spatiotemporally mode-locked state of the multimode fiber. By obtaining an arbitrary mode field distribution in the coordinate space through the momentum space random control device and finding the specific mode field distribution in the spatiotemporally mode-locked state of the multimode fiber through the intelligent feedback control device, the spatial mode field distribution can be accurately controlled, achieving the effect of simultaneous spatiotemporal mode locking.
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