W-type dispersion optical fiber with band-pass on-line filtering characteristic

Abstract

The invention discloses a W-type dispersion optical fiber with a band-pass on-line filtering characteristic, comprising a fiber core, an inner cladding and an outer cladding, wherein the fiber core is made of a pure SiO2 material, and is provided with a fiber core refractive index; the outer cladding is made of a B2O3-SiO2 material of which the refractive index changes rapidly along with the wavelength, and is provided with an outer cladding refractive index; the dispersion curves of the fiber core material and the outer cladding material are crossed at a wavelength position; the fiber core and the outer cladding form a short-wave cut-off low pass filter; the inner cladding is made of a material which meets the long-wave cut-off condition of a W-type optical fiber structure, and is provided with an inner cladding refractive index; and the refractive indexes of the fiber core, the inner cladding and the outer cladding are set to the characteristic capable of providing the W-type dispersion optical fiber. The W-type dispersion optical fiber can be welded with a traditional single mode fiber (SMF); the W-type dispersion optical fiber is in no need of connecting with the dispersion optical fibers which are respectively provided with a high pass filtering function and a low pass filtering function in series under the condition of realizing the on-line filtering function, thus reducing the manufacturing cost of the W-type dispersion optical fiber and the connection losses; and in addition, the W-type dispersion optical fiber is simple in structure, easy to manufacture and low incost, and the like.

Description

technical field The invention relates to a W-type dispersion optical fiber with band-pass online filtering characteristics, which can be used in optical fiber filters, amplifiers, lasers, etc., and belongs to the technical field of optical fibers. Background technique The rapid development of information technology has caused a sharp increase in the amount of data communication. The birth and development of optical fiber communication is an important revolution in the history of telecommunications. It is only a few decades from the theory of optical fiber to the technical realization and today's high-speed optical fiber communication, which will inevitably lead to the requirements of corresponding optical devices. Optical filtering technology is the most basic and important technology in optical fiber communication and optical network. It has a wide range of applications, and its level and cost will have a direct impact on the development of optical networks. Now commonly u...

AI Technical Summary

Problems solved by technology

However, the melting point of the above-mentioned multi-component glass MCG dispersion fiber is different from that of the traditional single-mode fiber. Therefore, when the two kinds of optical fibers are fused, the fusion and scattering losses are very large, resulting in the multi-component glass MCG dispersion fiber. Cannot be used in optical fiber communication and In practical applications in the field of sensing, and when the multi-component glass MCG dispersion fiber needs to realize the band-pass filtering function, it is necessary to use a high-pass filter and a low-pass filter for serial connection, which will undoubtedly increase its production cost and connection loss.