Optical taper type high-power coupler and manufacturing method thereof

Abstract

The invention discloses an optical taper type high-power coupler and a manufacturing method thereof. The manufacturing method comprises the following steps of: tapering an optical fiber preform part to form an energy optical fiber, then placing remained rods on a fused tapering machine and tapering according to the preset diameter of the input end surface of an optical taper shaped like a round table; setting the diameter of a coupling end surface matched with the energy optical fiber and the distance between the input end surface of the optical taper and the coupling end surface, and tapering through the fused tapering machine; welding the coupling end surface of the optical taper and the energy optical fiber into a whole; and fixing the optical taper into a metal sheath. The optical taper type high-power coupler is simple in structure, convenient to operate, smaller in size and convenient to carry; the size of the optical taper type high-power coupler can be flexibly adjusted according to practical situations; high-effective and high-reliable coupling between high-energy laser and the energy optical fiber can be realized; and the coupling energy of the high-energy laser can be effectively increased.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an optical cone type high-power coupler and a manufacturing method thereof. Background technique [0002] The use of optical fiber to transmit laser has the advantages of high light transmission efficiency, good reliability, and strong optical power. Although the base loss of the optical fiber itself is very high, it can carry nearly gigawatts of high-energy lasers. However, due to its small end face, it is often necessary to focus the beam through a lens to a beam with a diameter of less than 1mm in order to be effectively coupled into the end face of the fiber. This method is feasible to achieve lower power laser coupling. [0003] However, when the laser energy reaches kilowatts or even more than 10,000 watts, the above method will no longer be suitable. On the one hand, such a small spot puts forward higher requirements on the optical damage threshold of the lens. With...

AI Technical Summary

Problems solved by technology

However, if the core diameter of the optical fiber exceeds 1mm, it will greatly affect the bending loss of the optical fiber, causing a lot of inconvenience in the actual use of the optical fiber, and the use of coating technology, there is still too high energy intensity per unit area, which is easy to cause air particles The problem of breakdown loss fiber end face

In addition, even for a high-energy spot with a diameter of 1-2mm, the energy intensity per unit area is very high, which is easy to form a breakdown effect, causing damage to the lens end face and the fiber receiving end face

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