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A Panda-type Polarization-Maintaining Optical Fiber

A polarization-maintaining fiber, panda-type technology, applied in the direction of polarization fiber, cladding fiber, multi-layer core/cladding fiber, etc., to achieve the effect of high relative refractive index difference and small cut-off wavelength

Active Publication Date: 2020-08-25
FENGHUO COMM SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing polarization-maintaining fiber does not have this type of thin-diameter polarization-maintaining fiber product support, and related technology development is needed

Method used

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  • A Panda-type Polarization-Maintaining Optical Fiber
  • A Panda-type Polarization-Maintaining Optical Fiber
  • A Panda-type Polarization-Maintaining Optical Fiber

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0035] see figure 1 As shown, one embodiment of the present invention provides a panda-type polarization-maintaining fiber. Along the radial direction of the fiber, the polarization-maintaining fiber includes a core layer 1 and a silica cladding 2 sequentially arranged from the inside to the outside, and the silica cladding 2 Pure quartz is used;

[0036] see figure 1 As shown, for the panda-type polarization-maintaining optical fiber, this embodiment also has two circular stress regions 3 in the quartz cladding 2, and the two stress regions 3 are center-symmetrical along the core layer 1, and each stress region 3 A transition ring zone 4 concentric with the stress zone 3 is provided on the outer side of the stress zone 3, and the transition ring zone 4 of the two stress zones 3 is also center-symmetrical along the core layer 1, and there is...

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Abstract

The invention discloses a panda-type polarization-maintaining optical fiber, which includes a core layer and a quartz cladding layer; in the quartz cladding layer, there are two centrally symmetrical stress zones along the core layer, and a transition ring zone concentric with the stress zones is arranged outside the stress zones; The core layer includes a germanium-doped core layer and a fluorine-doped core layer arranged in sequence from the inside to the outside; the germanium-doped core layer includes a flat germanium-doped layer and a graded germanium-doped layer arranged in sequence from the inside to the outside, and the refractive index profile of the graded germanium-doped layer is Parabolic, the refractive index of the graded germanium-doped layer gradually decreases toward the direction away from the flat germanium-doped layer; the fluorine-doped core layer includes a quartz core layer, a first graded fluorine-doped layer, a flat fluorine-doped layer and a second The graded fluorine-doped layer, the refractive index profiles of the first graded fluorine-doped layer and the second graded fluorine-doped layer are curved, and are symmetrical along the refractive index profile of the flat fluorine-doped layer, and the refractive index of the first graded fluorine-doped layer moves away from the quartz core layer Decrease gradually; the cut-off wavelength of polarization-maintaining fiber is less than 830nm. The invention is suitable for multiple bands and has good attenuation and extinction ratio.

Description

technical field [0001] The invention relates to the technical field of polarization-maintaining optical fibers, in particular to a panda-type polarization-maintaining optical fiber. Background technique [0002] Inertial technology is a fully autonomous key technology used to achieve carrier attitude and trajectory control. Compared with other types of gyroscopes, the fiber optic gyroscope has many advantages such as short start-up time, simple structure, light weight, no moving parts, and strong environmental adaptability, and overcomes the locking phenomenon of the ring laser gyroscope, eliminating the need to maintain a small speed. The anti-mechanical jitter measures adopted by the sensitivity have become one of the main directions of rapid development in the field of inertial navigation technology, and are widely used in many fields such as aircraft, automobile and ship navigation systems and motion detection. [0003] The fiber ring wound by polarization-maintaining f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/024G02B6/028G02B6/036
CPCG02B6/024G02B6/028G02B6/03688G02B6/0283G02B6/0286
Inventor 罗文勇陈保平柯一礼杜城张涛李伟邵帅朱侨曾凡球
Owner FENGHUO COMM SCI & TECH CO LTD
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