A low-loss all-fiber low-pressure gas chamber system and its realization method

Abstract

The invention relates to an all-fiber low-pressure gas cavity system. The all-fiber low-pressure gas cavity system comprises a hollow fiber, a left end tapered solid core fiber, a right tapered solid core fiber, a left end hollow fiber and solid core fiber butt joint and encapsulation module, a right end hollow fiber and solid core fiber butt joint and encapsulation module and a gas cavity inflation and deflation module; the hollow fiber and the left tapered solid core fiber and the right end tapered solid core fiber are subjected to butt joint and encapsulation through the left end hollow fiber and solid core fiber butt joint and encapsulation module and the right end hollow fiber and solid core fiber butt joint and encapsulation module respectively; and the left end hollow fiber and solid core fiber butt joint and encapsulation module and the right end hollow fiber and solid core fiber butt joint and encapsulation module are closely connected with the gas cavity inflation and deflation module, so that vacuumizing, inflation and deflation operation as well as internal gas pressure monitoring can be performed on the gas cavity of the hollow fiber. The invention also provides an all-fiber low-pressure gas cavity realization method carrying out all-fiber encapsulation by adopting the above the all-fiber low-pressure gas cavity. With the realization method adopted, a low-loss, high-strength and long-term-stability all-fiber low-pressure gas cavity system can be realized, and the method has a bright application prospect and an important application value in all-fiber infrared gas lasers.

Description

technical field [0001] The invention belongs to the technical field of optical fiber gas chambers, and relates to a low-loss all-fiber low-pressure gas chamber system based on a hollow-core optical fiber and a taper-processed solid-core optical fiber high-precision butt joint packaging technology and an implementation method thereof. Background technique [0002] Anti-resonance hollow-core fiber is a new type of hollow-core fiber that has been developed rapidly in recent years. It adopts a light-guiding principle different from that of traditional silica fiber total internal reflection, and mainly uses the anti-resonance principle to confine light waves to the micron-scale air core. It has the characteristics of simple structure, convenient design, low transmission loss and weak nonlinear effect. By filling the hollow core fiber with gas, the interaction area and intensity of the light wave and the gas can be effectively increased, and the low-loss transmission characteristi...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the existing technical problems such as the large volume and poor stability of the vacuum isobaric hollow-core optical fiber gas cavity, and the excessive fusion loss of the all-fiber type hollow-core optical fiber gas cavity based on the direct fusion splicing technology Insufficient such as, the use of the tapered solid core fiber can be inserted into the internal characteristics of the hollow core fiber to achieve high-precision docking and stable packaging of the two fibers, and then through the specially designed fixture and gas filling and discharging system to achieve low pressure for specific low-pressure gas Loss, high strength, long-term stability and hollow-core fiber gas cavity preparation system for high-power laser output

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