Device and method for welding optical fibre and end cap

Abstract

The invention relates to a device and a method for welding an optical fibre and an end cap. The device comprises the following components: a beam expansion and collimation lens (1) used for carrying out beam expansion and collimation on a laser emitted by a laser emitter, a reflector (2) used for reflecting and reversing the laser emitted out of the beam expansion and collimation lens (1), a rotary reflector (4) used for reflecting the laser reflected by the reflector (2) into a conical light beam, an off-axis parabolic reflector I (3) used for reflecting the conical light beam reflected and expanded by the rotary reflector (4) again into an annular light beam, and an off-axis parabolic reflector II (7) used for focusing the annular light beam reflected by the off-axis parabolic reflector I (3) on the welded portion of the optical fibre (5) and the quartz end cap (8). The device and the method for welding the optical fibre and the end cap are convenient to apply and weld, and good in welding effect.

Description

technical field [0001] The invention relates to an optical fiber end cap fusion splicing device and a fusion splicing method thereof, in particular to a device and a method for dissolving an optical fiber and a quartz end cap by using a laser, and belongs to the field of laser technology. Background technique [0002] When using an energy-transfer fiber to transmit high-power lasers, the damage to the incident and exit end faces of the energy-transmitting fiber is the main factor limiting the fiber to transmit high-power lasers; when the laser power is small, there is no change in the end face, and when the laser power gradually increases, the end face appears Obvious pit-shaped damage points, but it does not affect the fiber transmission of laser light, but with the further increase of laser power, local melting will occur, and at the same time, the surface of the end face will be slightly deformed; and when the laser power reaches the damage threshold, plasma will be genera...

AI Technical Summary

Problems solved by technology

[0004] At present, the vast majority of industrial methods for connecting optical fibers use arcs as the heat source, which is limited to the connection method that needs to change the intensity of the heat source during the fusion splicing of quartz end caps and optical fibers

Moreover, the change of the geometric shape of the connection part also requires a corresponding change in the energy of the heat source and the welding distance; in addition, most commercially available optical fiber fusion splicers are designed for standard communication optical fibers with a diameter of 125um. limitations, it cannot be used for fusion splicing of optical fibers and large diameter quartz end caps

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