Low-loss polarization maintaining optical fiber for short wavelength as well as application and preparation method of low-loss polarization maintaining optical fiber
A polarization-maintaining fiber, low-loss technology, applied in the field of optical communication, can solve the problem of increased fiber attenuation, and achieve the effects of low attenuation, good UV resistance, good bending resistance and macrobending resistance.
Active Publication Date: 2022-04-01
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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[0004] Aiming at one or more of the above defects or improvement needs of the prior art, the present invention provides a low-loss polarization-maintaining fiber for short wavelengths, which is used to solve the attenuation of the existing polarization-maintaining fiber caused by radiation in space. Bigger problem
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[0048] Further, the present application also includes a method for preparing a short-wavelength low-loss polarization-maintaining optical fiber, which mainly includes the following steps:
[0049] (1) The inner cladding 3 and core rod are prepared respectively by PCVD (plasma chemical vapor deposition) process; specifically, the core rod in this application is made of SiCl 4 (Tetrachlorosilane), SiHCl 3 (Trichlorosilane), C 2 f 6 (Hexafluoroethane), O 2 (Oxygen) is used as the raw material to prepare the core rod layer, and by adjusting the flow rate and ratio of the gas, a core rod with the required diameter and refractive index is prepared under the condition of an appropriate deposition rate. Wherein, in the preparation raw material of the present application, O 2 is excess, while hydrogen only passes through SiHCl 3 to provide, by using a flow meter to control the SiHCl 3 The flow can realize the control of hydrogen element, and then achieve the controllability of hy...
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Abstract
The invention discloses a short-wavelength low-loss polarization maintaining optical fiber and application and a preparation method thereof, and belongs to the technical field of optical communication, the short-wavelength low-loss polarization maintaining optical fiber comprises a fiber core layer, a stress layer, an inner cladding layer and an outer cladding layer, the fiber core layer is embedded in the center of the inner cladding layer, and the outer cladding layer wraps the periphery of the inner cladding layer; the stress layers are arranged in pairs and embedded in the inner cladding, and the two stress layers are symmetrically arranged on the two sides of the fiber core layer. The short-wavelength polarization-maintaining optical fiber which has low loss performance, radiation resistance and macro-bending resistance and is used for 400-700 nm is obtained by controlling the raw material flow, the diameters of the fiber core layer, the stress layer, the inner cladding layer and the outer cladding layer, the melting wire drawing temperature, the wire drawing speed, the wire drawing tension and the like.
Description
technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a low-loss polarization-maintaining optical fiber for short wavelength and its application and preparation method. Background technique [0002] Polarization maintaining optical fiber can be widely used in various fields of national economy such as aerospace, aviation, navigation, industrial manufacturing technology and communication. In the interferometric optical fiber sensor based on optical coherent detection, the use of polarization-maintaining optical fiber can ensure that the linear polarization direction remains unchanged, improve the coherent signal-to-noise ratio, and achieve high-precision measurement of physical quantities. [0003] At present, the panda-type polarization maintaining fiber is widely used, which is characterized by the introduction of circular stress regions symmetrically on both sides of the fiber core, and boron is doped in ...
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IPC IPC(8): G02B6/024G02B6/036G02B6/02C03B37/018C03B37/027C03C25/285
CPCY02P40/57
Inventor 骆城杨坤胡小龙张翼菲张承炎常华峰曹蓓蓓杨晨
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD