Homemade radiation-resistant Er-doped silica fiber for space application in high-dose radiation environment

Chi Cao; Yingbin Xing; Jinyan Li

doi:10.1117/12.2627364

27 March 2022 Homemade radiation-resistant Er-doped silica fiber for space application in high-dose radiation environment

Chi Cao, Yingbin Xing, Jinyan Li

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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 12169CM (2022) https://doi.org/10.1117/12.2627364
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

Er-doped fibers amplifiers (EDFAs) have widely used in many fields, such as optical fiber communication and inertial research ^[1]. However, the erbium-doped fibers (EDFs), as the key component of EDFA, are extremely sensitive to various cosmic rays (X-rays, gamma rays and protons). The fabrication of conventional EDFs add the co-dopants such as aluminum, phosphorus and germanium for increasing the solubility of erbium ions and weakening the cluster effect ^[2]. As a consequence when the erbium-doped fibers are irradiated to a certain dose, the color centers (AlE’, P1 and Ge-NBOHC, etc.) will be generated which causes radiation-induced attenuation (RIA) and reduces EDFA amplification performance ^[3]. In this work, the lab-built radiation-resistant Er-doped fibers (RREDF) with the size of 9/125μm (core/cladding) were manufactured by Modified Chemical Vapor Deposition (MCVD).The Cerium and Lanthanum were doped in fibers for improving radiation resistance and amplification efficient ^[2]. Considering the radiation dose in actual space environment is 10²~10⁵Gy ^[3], the Er-doped fibers were irradiated by Co₆₀ radiation source with 1500Gy dose and 0.2Gy/s dose rate at RT. The RIA of RREDF and radiation-induced gain variation (RIGV) of RREDFA were tested, and a conventional Er-doped fiber with the same dimension as RREDF was also fabricated for comparison. The characteristic of two EDFs are shown in Table 1.

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Chi Cao, Yingbin Xing, and Jinyan Li "Homemade radiation-resistant Er-doped silica fiber for space application in high-dose radiation environment", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 12169CM (27 March 2022); https://doi.org/10.1117/12.2627364

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KEYWORDS

Optical amplifiers

Optical fibers

Fiber amplifiers

Cerium

Gamma radiation

Lanthanum

Radiation effects

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