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Large mode field single-mode radiation-resistant erbium-ytterbium co-doped optical fiber and preparation method thereof

A radiation-resistant, large-mode-field technology, applied in cladding optical fiber, glass manufacturing equipment, glass fiber products, etc., can solve the problems of performance degradation and failure of erbium-ytterbium co-doped optical fiber, and improve the stability of radiation-resistant reinforcement , large mode field area, and the effect of reducing the refractive index

Active Publication Date: 2022-08-05
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to solve the problem of performance degradation or even failure of erbium-ytterbium co-doped fiber under high-energy particle irradiation conditions and higher power single-mode output, the present invention provides a new type of structure, radiation-resistant, large-mode-field single-mode erbium-ytterbium co-doped fiber

Method used

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  • Large mode field single-mode radiation-resistant erbium-ytterbium co-doped optical fiber and preparation method thereof
  • Large mode field single-mode radiation-resistant erbium-ytterbium co-doped optical fiber and preparation method thereof
  • Large mode field single-mode radiation-resistant erbium-ytterbium co-doped optical fiber and preparation method thereof

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preparation example Construction

[0046] The preparation method of the large-mode field single-mode radiation-resistant erbium-ytterbium co-doped optical fiber comprises the following steps:

[0047] Step 1), using a quartz tube as a deposition liner, wherein the thickness of the quartz deposition tube is 0.5-1.0 mm, using MCVD combined with a chelate vapor deposition method to prepare a fiber core, after preheating and impurity removal treatment, according to the core component flow rate The flow rate of the reaction material and oxygen is designed and set, and the deposition temperature is 1600-1900 ° C. The annular outer core layer 3, the annular depressed core layer 2, and the central core layer 1 are sequentially deposited, and shrunk into a solid mandrel by a single shrinking process. Among them, the hydrogen flow rate is 90~120sccm;

[0048] Step 2), according to the requirement of the optical fiber core wrapping ratio, adopt the sleeve technology to coat the quartz tube on the core rod, form the inner ...

Embodiment

[0060] The preparation method of erbium-ytterbium co-doped optical fiber preform is the same as that of the comparative example, the deposition liner adopts 28 / 26mm quartz tube (28mm is the outer diameter of the quartz deposition tube, 26mm is the inner diameter of the quartz deposition tube), and the reaction materials are SiCl respectively 4 , Er(TMHD) 3 , Yb(TMHD) 3 , Ce(TMHD) 3 , POCl 3 , SiF 4 etc., the specific flow rate is shown in Table 2, the annular outer core layer 3, the annular depressed core layer 2, and the central core layer 1 are deposited in sequence, and the deposition temperature is 1850°C. After the deposition, the quartz tube was shrunk into a solid rod by adopting a single-shot shrinking process with a hydrogen flow rate of 90-120 sccm. The difference is that an outer layer 5 is added to the outer layer of the preform of the comparative example, and the outer layer 5 is a sunken fluorine-doped layer, which is prepared by plasma chemical vapor deposit...

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Abstract

The invention discloses a large-mode field single-mode radiation-resistant erbium-ytterbium co-doped optical fiber and a preparation method thereof, and solves the problem of performance degradation or even failure of the erbium-ytterbium co-doped optical fiber under the existing high-energy particle irradiation conditions and higher power single-mode output. The problem includes the core, inner cladding, and outer cladding sequentially arranged from the inside to the outside; the core includes a central core layer, an annular depressed core layer, and an annular outer core layer sequentially arranged from the inside to the outside; the core layer The content of Er and Yb components is gradually distributed along the radial direction from the inside to the outside, and the exponent α of the power function is 0.3~0.6. The specific content is: Er: 0.05~0.3Wt.%, Yb: 1~5Wt.% ; The core co-doped components are P, Ce, and F; the outer cladding is a depressed fluorine doped layer.

Description

technical field [0001] The invention belongs to the technical field of optical fibers, in particular to a large-mode field single-mode radiation-resistant erbium-ytterbium co-doped optical fiber and a preparation method thereof. Background technique [0002] Space laser communication technology has the advantages of fast transmission rate, large communication capacity, strong anti-electromagnetic interference performance, high confidentiality, and its communication terminal is small in size, low in power consumption, and extremely practical. The best solution with low speed and poor real-time performance. As a key component of space laser communication system, fiber amplifier is mainly used for high-power amplification of optical transmitting system and pre-amplification of optical receiving system, and plays an important role in space laser communication. [0003] In recent years, deep space exploration activities such as lunar exploration and Mars exploration have become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036G02B6/02C03B37/018C03B37/027C03C25/54C03C25/44C03C25/26C03C25/1065
CPCG02B6/036G02B6/02009G02B6/03661C03B37/018C03B37/01853C03C25/54C03C25/44C03C25/26C03C25/109C03B2203/24C03B2203/32
Inventor 折胜飞侯超奇郭海涛高崧张岩李艺昭王根成
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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