Quasi distributed optical fiber beam combiner

Abstract

The invention relates to a quasi distributed optical fiber beam combiner. The quasi distributed optical fiber beam combiner comprises a signal fiber and a plurality of pump fibers, wherein each pump fiber is welded on the signal fiber, and welding surfaces are formed at welding positions; the centers of the welding surfaces are dispersedly distributed in a [0-phi]*[0-L] area of a (theta, z) plane formed by expanding the outer surface of the signal fiber; all coupling connection points are packaged inside a unified heat-dissipating packaging shell to form an optical fiber beam combiner applicable to an optical fiber laser. The quasi distributed optical fiber beam combiner has the advantages as follows: through the connection points in spatial disperse distribution, quasi distributed pump power coupling is performed, so that the optical power and the heating spatial density are reduced, the defect that in the conventional beam combiner, the heating spatial density of the coupling connection points is too high is overcome, the working stability is improved, the long-term reliability of the optical fiber beam combiner is improved, and the service life of the optical fiber beam combiner is prolonged; the quasi distributed optical fiber beam combiner has a wide application space in the fields of high-power continuous optical fiber lasers, quasi continuous optical fiber lasers, pulse optical fiber lasers and the like.

Description

technical field [0001] The invention relates to an optical fiber beam combiner. Background technique [0002] The fiber combiner is one of the main components in fiber lasers and fiber amplifiers. It couples the power of multiple pump lasers to the inner cladding of passive double-clad fibers, and then fuses with active double-clad fibers and passes through the inner cladding. The multiple reflections of the doped fiber core are absorbed, thereby amplifying the signal light. Fiber combiner plays a very important role in systems such as fiber lasers, and is one of the limiting factors for the maximum output power of fiber lasers. The development of high-power fiber combiners can actively and effectively promote high-power fiber lasers, including large Development of high-power continuous fiber lasers, high-power quasi-continuous fiber lasers, pulsed fiber lasers, etc. [0003] The current fiber combiner is mainly to form a multi-core composite fiber through fusion tapering ...

AI Technical Summary

Problems solved by technology

Such a method will cause too much concentration at the coupling fusion point, and the surrounding optical power and heat generation space density will be too large, making this area prone to heat accumulation and temperature rise, and easily causing device damage and damage in this area

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