Manufacturing method of novel optical fiber direct fusion collimator

Abstract

The invention discloses a manufacturing method of a novel optical fiber direct fusion collimator. The manufacturing method comprises the following steps of: 1 preparing an optical fiber wire with a protection piece, and welding the protection piece at the end part of a cladding on the optical fiber wire after a coating layer is removed; 2 calculating the optical fiber insertion amount, measuring the position of an output light spot beam waist through a light spot instrument, measuring the thickness of a lens, and obtaining the optical fiber insertion amount of the optical fiber wire needing to be inserted into the C lens through calculation when an ideal light spot exists; 3 optical fiber fusion welding: fusing the protection piece of the optical fiber wire with the protection piece on the C lens, and the insertion distance being the optical fiber insertion amount calculated in the step 2; and 4 manufacturing a collimator, fixing the optical fiber wire welded in the step 3 by using a fixing device, and packaging the optical fiber wire, the fixing device and the C lens by using a packaging tube. The method has the advantages that damage to the fiber core is avoided, the light spot quality is good, the normal polarization extinction ratio is ensured, and the normal working distance and divergence angle of the collimator are ensured.

Description

technical field [0001] The invention relates to the technical field of laser communication, in particular to a manufacturing method of a novel optical fiber direct melting collimator. Background technique [0002] The fiber collimator is precisely positioned by the pigtail and the self-focusing lens. It can convert the transmitted light in the fiber into collimated light (parallel light), or couple the external parallel (approximately parallel) light into the single-mode fiber. [0003] Fiber collimators are widely used in fiber optic communications and fiber lasers. Lasers have been widely used in the medical field. Traditional fiber collimators are very mature. Fiber heads, C lenses, and glass tubes used for packaging are usually There is an air gap between the C lens and the fiber head, so the inclined end face of the fiber head and the C lens are respectively coated with AR film to reduce the loss caused by reflection, and the ideal work can be achieved by adjusting the...

AI Technical Summary

Problems solved by technology

Although this ordinary direct-fusing collimator can improve the power handling capacity very well, there is a processing tolerance in the radius of curvature and thickness of the C lens itself, which will cause the output light divergence angle to be too large, which deviates from the ideal design result. The tolerance of controlling the C lens will increase the cost; and the core of the fiber end face may be damaged during the fusion splicing process, resulting in poor beam quality of the exit spot, such as low ellipticity, and for sensitive polarization-maintaining optical fiber lines, it will also affect polarization extinction Ratio, greatly reducing the yield of products

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