KDP uniaxial crystal cladding special optical fiber

Abstract

A KDP uniaxial crystal cladding special optical fiber comprises a fiber core 1 and a KDP cladding 2, and is characterized in that the cladding 2 of the special optical fiber is made of a KDP uniaxialcrystal material; the fiber core 1 is a passive core or an active core, and the fiber core material is various doped quartz crystal materials. The refractive index of the fiber core 1 is n1; the threemain refractive indices of the KDP cladding layer 2 are nx, ny and nz respectively, and the size of the main refractive indices can be nx=ny= / nz, nx= / ny=nz or ny= / nx=nz; the relationship between therefractive indices of the fiber core and cladding satisfies: n1) nx, n1) ny or n1) nz; a radius a of the fiber core 1 and a radius b of the KDP cladding 2 satisfies the relationship: b) a. The KDP uniaxial crystal cladding can adopt a circular or non-circular structure, and the longitudinal section of the KDP uniaxial crystal cladding can be a rod-shaped structure or a conical structure (includinga concave conical structure, a linear conical structure and a convex conical structure). The KDP uniaxial crystal cladding special optical fiber can be used for optical transmission and manufacturingoptical fiber devices such as optical fiber sensors, optical fiber polarizers, optical fiber lasers and the like. The KDP uniaxial crystal cladding special optical fiber can be manufactured by adopting a solution temperature reduction method; and a prior KDP crystal growth technology and a prior rapid growth technology are mature, and the yield is high.

Description

technical field [0001] The invention relates to a special optical fiber clad with KDP uniaxial crystal, which can be used for optical communication or other optical fiber devices and optoelectronic devices. Background technique [0002] With the sharp increase in people's demand for information and the need for optical devices with better performance, ordinary single-mode optical fibers can no longer meet the needs. Special optical fibers made of special optical fiber structures or special materials have broadened the scope of optical transmission and optical device design. the way. These special optical fibers and devices made of them are widely used in optical fiber communication, optoelectronic devices and other fields. For example, in terms of ultra-long-distance and ultra-high-speed communication, especially for optical transmission systems of 400G and above, it is necessary to use special optical fibers with ultra-low loss and large mode area to realize optical signal...

AI Technical Summary

Problems solved by technology

In terms of optical devices, since ordinary active fibers in fiber lasers and fiber amplifiers are generally single-mode fibers, the core diameter is generally about 10um. Because the core is very thin, the output power of ordinary single-mode active fibers is affected by the optical power. Due to the limitations of factors such as damage, nonlinear effects and thermal effects, there is a limit to the laser output power of single-mode active fibers [Sridharan A K, Barty C P J, Siders C W, et al. "Analysis of the scalability of diffraction-limited fiber lasers and amplifiers to high average power", Optics Express, 2008, 16(17): 13240-13266]

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