A gain-stabilized 2-micron infrared polarized laser physiotherapy system

By employing a ring cavity self-clamping gain stabilization control scheme and polarization-maintaining fiber transmission, the problem of unstable optical power output of the infrared polarization therapy instrument was solved, achieving gain stabilization and polarization characteristics maintenance of 2-micron infrared polarized laser, thereby improving human body absorption efficiency and product usability.

CN115707493BActive Publication Date: 2026-07-17CHANGCHUN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGCHUN UNIV OF SCI & TECH
Filing Date
2021-08-19
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The optical power output of existing infrared polarization therapy devices is unstable. In particular, pulsed lasers are prone to current fluctuations and surges, making it difficult to meet the high demands of human physiotherapy. Furthermore, their polarization characteristics are singular, resulting in poor absorption by the human body.

Method used

A ring cavity self-clamping gain stabilization control scheme is adopted, which combines components such as a 2-micron high-reflectivity fiber grating, a pump combiner, a holmium-thulium co-doped double-clad active fiber, and an acousto-optic modulator to form a gain-stable 2-micron infrared polarization laser resonant cavity. The spot size can be continuously adjusted through polarization-maintaining fiber transmission and a modular laser output head.

Benefits of technology

It achieves gain stability and polarization characteristics preservation in laser output, ensuring that the polarization state of the laser remains unchanged during transmission, thereby improving human absorption efficiency and product usability.

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Abstract

The application relates to the field of optical technology and discloses a 2-micron infrared polarized laser physiotherapy system with stable gain, which is composed of a 2-micron pulsed laser resonant cavity of stimulated radiation, a first-stage gain ring cavity, a second-stage gain ring cavity, an optical isolator, a filter, a power monitoring detector, a polarization light splitting module, a polarization light guiding fiber and a polarized laser output head, can output various polarized lasers, has the characteristics of stable gain and adjustable light spots, and can be applied to various linear polarized laser, circular polarized laser, vector polarized laser and vortex circular polarized laser physiotherapy systems.
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