A flexible radiation protection sleeve for optical fiber used in space and its preparation method

Abstract

The invention discloses a flexible optical fiber irradiation protective sleeve for space and a preparation method thereof. The protective sleeve comprises an optical fiber tight sleeve, an inner braided layer, an outer braided layer and an outer protective sleeve wrapped in sequence, the optical fiber tight sleeve and The outer protective sleeve is made of plastic, the inner and outer braided layers respectively take the optical fiber tight sleeve and the inner braided layer as the braided core diameter, and the braided material is metal wire, such as copper wire. In the invention, a flexible irradiation protection layer is formed on the outer layer of the optical fiber by adopting high-density metal wires and high-density weaving technology, so that the optical fiber will not fail in function under harsh irradiation conditions, and can be unfolded and expanded under the action of a small torque. bending.

Description

technical field [0001] The invention relates to a flexible radiation protection sleeve for optical fiber used in space and a preparation method thereof, belonging to the technical field of radiation protection of optical fiber. Background technique [0002] As a special carrier for optical signal transmission, optical fiber is widely used in national life, industrial production and scientific research. With the maturity of optical fiber and corresponding derivative technologies of optical fiber, the application of optical fiber has gradually expanded to the aerospace field, such as optical fiber gyroscope, atomic magnetometer (Zhangheng 01 satellite) and quantum unit (Mozi satellite), etc. [0003] The main material of the optical fiber is SiO 2 , is a special glass, the material will be damaged under the irradiation of cosmic rays, resulting in the irreversible optical power transmission loss of the optical fiber, which makes the equipment relying on the optical fiber to t...

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Problems solved by technology

[0003] The main material of the optical fiber is SiO 2 , is a special glass, the material will be damaged under the irradiation of cosmic rays, resulting in the irreversible optical power transmission loss of the optical fiber, which makes the equipment relying on the optical fiber to transmit the optical signal to fail

[0004] At present, optical fiber manufacturers mainly conduct optical fiber research and development for the ground use environment, and do not consider the radiation impact in space to carry out corresponding anti-radiation design. Difficult to withstand large doses of cosmic ray exposure without functional failure

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