Multiple channel tuned long period optical fiber grating filter

A fiber grating and long-period technology, which is applied to clad optical fiber, optical waveguide and light guide, etc., can solve the problem of uneven long-period fiber grating, and achieve the effects of low production cost, good stability and strong tunability

Inactive Publication Date: 2010-01-13
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the energy of the ion beam will gradually weaken during the implantation process, the long-period fiber gratings written by this method are generally inhomogeneous.

Method used

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  • Multiple channel tuned long period optical fiber grating filter
  • Multiple channel tuned long period optical fiber grating filter
  • Multiple channel tuned long period optical fiber grating filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Examples of the present invention figure 1 and figure 2 As shown, it includes a cover plate 1, a pressure template 2 and a bottom plate 4, which is characterized in that the cover plate 1, the pressure template 2 and the bottom plate 4 are all disc-shaped with the same area, and the pressure template 2 has rectangular grooves arranged periodically 3. The bottom plate 4 has a divergent optical fiber groove 5, and the optical fiber can be placed in the optical fiber groove 5 on the bottom plate 4. The pressure template 2 with the grooved surface is placed on the bottom plate 4 and exerts pressure on the optical fiber in the optical fiber groove 5. The pressure template 2 can rotate horizontally around the center of the circle; the cover plate 1 covers the pressure template 2, and exerts force on the pressure template 2 indirectly through the cover plate 1 to ensure uniform force application.

[0022] The duty ratio of the periodically arranged rectangular grooves 3 on t...

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Abstract

The invention provides a multi-channel tunable long period fiber grating filter, comprising a cover plate, a pressure templet, a bottom board and a force application device thereof. The invention is characterized in that the cover plate, the pressure templet and the bottom board are all in disk shapes with the same area, and the pressure templet is provided with rectangular grooves which are processed with mechanical wires and periodically arranged; the bottom board is provided with divergent optical fiber grooves, and an optical fiber can be arranged inside the optical fiber grooves on the bottom board; the surface of the pressure templet with the grooves is arranged on the bottom board and presses the optical fiber in the optical fiber grooves to form a long period grating. The invention with low cost and strong tunability is the multi-channel tunable long period fiber grating filter.

Description

(1) Technical field [0001] The invention belongs to the technical field of optical fiber sensing and optical fiber communication, in particular to a multi-channel tunable long-period optical fiber grating filter. (2) Background technology [0002] Long period fiber grating (long period fiber grating, LPFG) is a transmission-type band-stop filter device that couples the guided wave fundamental mode of the fiber core to the forward-propagating cladding mode, and its grating period is much larger than that of the fiber Bragg grating. (tens of microns to hundreds of microns). LPFG has the advantages of small insertion loss, wavelength coding, no backscattering, no electromagnetic interference, and compatibility with optical fibers. It has important application value in the fields of optical fiber communication and optical fiber sensing. [0003] The fabrication methods of long-period fiber gratings mainly include ultraviolet light writing method, CO2 laser writing method, etchi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02
Inventor 冯德军高霞姜明顺隋青美
Owner SHANDONG UNIV
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