Polarization dependent device and fiber laser

By fabricating tantalum-palladium-sulfur polarization correlation devices, a fiber laser with a ring cavity structure was constructed, which solved the problem of insufficient controllability of existing dual-mode ultrafast fiber lasers. It achieved efficient and stable soliton and noise-like dual-mode switching, which is suitable for microfabrication and ultrafast physics research.

CN116667116BActive Publication Date: 2026-05-29NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Filing Date
2023-06-14
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing dual-mode ultrafast fiber lasers require increased pump power to achieve soliton-to-noise-like conversion, which reduces controllability. Furthermore, devices based on real SA are costly and lack stability.

Method used

Polarization-dependent devices are fabricated using tantalum-palladium-sulfur materials. Needle-shaped tantalum-palladium-sulfur is formed by reaction in a dual-temperature tube furnace and precisely placed on the end face of an optical fiber jumper. Combined with a pump source, wavelength division multiplexer, erbium-doped fiber, etc., a fiber laser with a ring cavity structure is constructed.

Benefits of technology

It achieves efficient and stable switching between soliton and noise-like dual modes without relying on increasing pump power, improving the controllability and reliability of the laser, and is suitable for microfabrication and ultrafast physics research.

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Abstract

The application provides a polarization-dependent device and an optical fiber laser, wherein self-made polyester transparent adhesive is used as a transmission tool, tantalum palladium sulfide is accurately placed in the center of the end face of an optical fiber jumper under a microscope, and the tantalum palladium sulfide is connected with another optical fiber jumper by using an optical fiber sleeve to form the polarization-dependent device. The tantalum palladium sulfide has excellent nonlinear polarization optical response, under the condition that the input pump power is constant, the polarization-dependent device based on the tantalum palladium sulfide can realize stable soliton and noise-like dual-mode controllable switching in a single superfast optical fiber laser. In a single superfast optical fiber laser system, the controllable stable switching of different superfast laser pulse modes has great expansion application potential. The polarization-dependent device based on the tantalum palladium sulfide in the application has simple structure, simple preparation and low cost, and has good nonlinear optical performance and long-term working stability.
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