Hollow-core anti-resonance optical fiber design method and system for femtosecond laser stone crusher

Through the hollow-core anti-resonant fiber design, combined with the anti-resonant transmission unit and water-cooled temperature control system, the thermal management and nonlinear effect problems of traditional optical fibers under high-power laser input are solved, the stable transmission and safe use of femtosecond lasers are achieved, and the fiber life is extended.

CN120652603APending Publication Date: 2025-09-16SHUNWEI (JIAXING) OPTICAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511104287.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-07
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

In existing femtosecond laser lithotripsy technology, traditional optical fibers have thermal management problems under high-power laser input, leading to overheating and damage risks, and serious nonlinear effects, affecting the stability and safety of laser transmission.

Method used

A hollow-core antiresonant optical fiber was designed, combining an antiresonant transmission unit and a water-cooled temperature control unit. An antiresonant transmission band gap was formed through precisely designed wall thickness and spacing. A spiral or serpentine microchannel structure was integrated for forced convection heat dissipation. It was also equipped with a distributed fiber grating sensor array and an intelligent flow rate regulation system to achieve closed-loop temperature control.

Benefits of technology

Effectively reduce nonlinear effects, ensure the temperature stability of the optical fiber under high-power laser transmission, prevent overheating damage, extend the life of the optical fiber, improve transmission stability and safety, and meet the needs of clinical lithotripsy surgery.

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Abstract

The invention discloses a hollow-core anti-resonance optical fiber design method and system for a femtosecond laser stone crusher, and relates to the technical field of medical laser instruments. The method comprises the steps that an anti-resonance transmission unit is constructed, the anti-resonance transmission unit is composed of an air core and anti-resonance quartz cladding tubes periodically arranged on the periphery, the cladding tubes form an anti-resonance transmission band gap with a specific wavelength through precisely designed wall thickness and spacing, and the air core serves as a main transmission channel; a water-cooling temperature control unit is integrated, the water-cooling temperature control unit comprises a spiral or snakelike micro-channel structure integrated in an outer cladding of the anti-resonance transmission unit, the outer cladding is made of a biocompatible high polymer material, a micro-channel and an optical fiber are axially arranged at a preset angle, and a forced convection heat dissipation path is formed by injecting a cooling medium. By optimizing the anti-resonance transmission unit and the water-cooling temperature control unit, stable laser transmission, efficient thermal management and reliability under long-time high-power laser operation are realized.
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