Ionization-irradiation-resistant active optical fiber for space

Abstract

The invention relates to an ionization-irradiation-resistant active optical fiber for space. The ionization-irradiation-resistant active optical fiber comprises an active fiber core, an inner cladding layer, an outer cladding layer and a coating layer; the materials of the active fiber core comprise active reactive ions and silicon dioxide of a co-doping agent, wherein the active reactive ions are one or more of halides or oxides of rare-earth elements of which the atomic number is from 57 to 71, and the co-doping agent is one or more of germanium compounds, phosphorus compounds, aluminum compounds and fluorine compounds; cerium compounds are doped in the material of the active fiber core and the dosage concentration of the cerium compounds is between 2,000 and 10,000ppm; and cerium or fluorine can be also doped in the material of the inner cladding layer, wherein the dosage concentration of cerium ions is between 0 and 8,000ppm, and the dosage concentration of fluorine ions is between 0 and 1,000ppm. In the invention, the ionization-irradiation-resistant characteristics of the active optical fiber can be greatly improved according to test verification because the cerium is doped in the fiber core of the ionization-irradiation-resistant active optical fiber, and the problem of application restriction of the current active optical fiber in an irradiation environment is solved.

Description

technical field

[0001] The invention relates to an active optical fiber, in particular to an anti-ionizing radiation active optical fiber used in an environment with relatively strict anti-ionizing radiation performance requirements such as outer space. Background technique

[0002] In general, an active fiber consists of a core that transmits and amplifies signal light and a cladding that confines the light within the core. In order to make the fiber core have amplification performance, a certain concentration of metal elements, especially rare earth metal elements, such as neodymium (Nd), erbium (Er), thulium (Tm) and ytterbium (Yb) are usually introduced. At the same time, in order to improve the amplification effect, various metal elements can be co-doped. For example, ytterbium can be used in erbium-doped fiber (EDF) to improve the absorption efficiency of the fiber to the pump signal light. In order to improve the optical performance, the active fiber is usually made ...

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