Stress-focusing shaft-alignment panda polarization-maintaining fiber and shaft alignment method thereof

A polarization-maintaining fiber, axis-type technology, applied in polarization fibers, cladding fibers, etc., can solve the problems of reducing the birefringence consistency of polarization-maintaining fibers, reducing the on-axis efficiency and accuracy, and affecting the on-axis field of view, etc. The effect of small fiber outer coating diameter, improved accuracy and efficiency, high birefringence performance

Active Publication Date: 2016-01-27
JIANGSU FASTEN OPTOELECTRONICS TECH
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  • Abstract
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Problems solved by technology

[0005] The cladding diameters of currently used polarization-maintaining fibers are generally 125 μm and 80 μm. When using panda-type polarization-maintaining fibers in the system, fiber fusion splicing is required to complete the fixed connection of pigtails of different devices. During the fusion splicing process, It is necessary to correspond to the circular stress zones symmetrically distributed on both sides of the fiber core, so as to prevent the polarization crosstalk caused by the crossing of the stress axis and reduce the birefringence consistency of the polarization maintaining fiber

Method used

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  • Stress-focusing shaft-alignment panda polarization-maintaining fiber and shaft alignment method thereof
  • Stress-focusing shaft-alignment panda polarization-maintaining fiber and shaft alignment method thereof
  • Stress-focusing shaft-alignment panda polarization-maintaining fiber and shaft alignment method thereof

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Embodiment Construction

[0025] see Figure 1~3 , the present invention relates to a stress-focused axial-type panda polarization-maintaining optical fiber, the optical fiber includes a core 101 wrapped in the center of the cladding 102, and the cladding 102 is also provided with a stress zone 103, and the stress zone 103 is symmetrical Set on both sides of the fiber core 101, the center of the stress zone 103 is provided with a focusing light-transmitting circle 104, the refractive index of the above-mentioned focusing light-transmitting circle 104 is higher than that of the stress zone 103; the diameter D1∈(3 μm , 5 μm), the diameter D2∈ (58 μm, 81 μm) of the cladding layer 102, the diameter D3∈ (10 μm, 30 μm) of the stress zone 103; the inner coating layer 105 and the outer coating layer 105 and the outer coating layer 105 are also sequentially coated outside the cladding layer 102 during application. The coating layer 106, at this time, the diameter D5∈(85 μm, 115 μm) of the inner coating layer 10...

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Abstract

The invention relates to a stress-focusing shaft-alignment panda polarization-maintaining fiber and a shaft alignment method thereof. The fiber comprises a fiber core coated at the center of a cladding layer; stress regions are arranged at the cladding layer and are symmetrically arranged at the two sides of the fiber core symmetrically; focusing light-transmission circles are arranged at centers of the stress regions; and the refractive index of the focusing light-transmission circle is higher than that of the stress region. The diameter D1 of the fiber core belongs to (3 micros, 5 microns), the diameter D2 of the cladding layer belongs to (58 microns, 81 microns), the diameter D3 of the stress region belongs to (10 microns, 30 microns), and the diameter D4 of the focusing light-transmission circle at the center of the stress region belongs to (2 microns, 8 microns). According to the fiber and the shaft alignment method thereof, the focusing light-transmission circles will form a bright line at a field of view during spotting, focusing, and alignment process at the side and the bright line can be used for precise alignment.

Description

technical field [0001] The present invention relates to a panda-type polarization-maintaining optical fiber and its alignment method, in particular to a narrow-diameter panda-type polarization-maintaining optical fiber that can accurately and quickly realize alignment with high birefringence performance in the process of fusion splicing and docking of the panda polarization-maintaining optical fiber. An optical fiber and an axis alignment method thereof belong to the technical field of optical fiber. Background technique [0002] Polarization-maintaining fiber, that is, polarization-maintaining fiber, is used to transmit linearly polarized light and is widely used in various fields of national economy such as aerospace, aviation, navigation, industrial manufacturing technology and communication. In the interferometric fiber sensor based on optical coherent detection, The use of polarization-maintaining fiber can ensure that the direction of linear polarization remains unchan...

Claims

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Application Information

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IPC IPC(8): G02B6/024
CPCG02B6/024
Inventor 赵霞苏武周震华冯术娟黄本华候树虎赵轩徐律
Owner JIANGSU FASTEN OPTOELECTRONICS TECH
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