All-fiber flat filter and fabricating method thereof

A manufacturing method and filter technology, which are applied in the direction of cladding fiber, optical waveguide light guide, optical waveguide coupling, etc., can solve the problem of low flat performance of optical filter, and achieve excellent flat performance, large dynamic range, and simple structure. Effect

Inactive Publication Date: 2012-12-05
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is based on the fact that the flat performance of the current optical filter is not high, thus a kind of all-fiber flat filter with good flatness is proposed

Method used

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  • All-fiber flat filter and fabricating method thereof
  • All-fiber flat filter and fabricating method thereof
  • All-fiber flat filter and fabricating method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, a kind of manufacturing method of all-fiber flat filter, this manufacturing method comprises the following steps:

[0033] Step 1, take a three-core optical fiber whose length is 1 centimeter, including the first core 11, the second core 12 and the third core 13 whose refractive index is 1.461, the first core 11 and the second core The distance between the centers of the sub-12 and between the centers of the second core 12 and the third core 13 is 30 microns, and the centerlines of the first core 11, the second core 12 and the third core 13 are in a plane Inside, the materials of the first cladding inner 22 and the second cladding inner 23 of the optical fiber are doped with the same doping element Ge.

[0034] In step 2, an ultraviolet laser 4 is configured, and the ultraviolet laser adopts an ArF excimer laser.

[0035] Step 3: On the three-core optical fiber, choose any position as the first irradiation position 31 , and set it as the second irradiatio...

Embodiment 2

[0046] Embodiment 2, a manufacturing method of an all-fiber flat filter, the manufacturing method comprising the following steps:

[0047] Step 1, take a length of 5 cm, including a three-core optical fiber whose refractive index is 1.462 for the first core 11, the second core 12 and the third core 13, the first core 11 and the second core The distance between the centers of the sub-12 and between the centers of the second core 12 and the third core 13 is 20 microns, and the centerlines of the first core 11, the second core 12 and the third core 13 are in a plane Inside, the materials of the first cladding inner 22 and the second cladding inner 23 of the optical fiber are doped with the same doping elements Ge and B.

[0048] Step 2, configuring an ultraviolet laser 4, the ultraviolet laser adopts a KrF excimer laser.

[0049] Step 3: On the three-core optical fiber, choose any position as the first irradiation position 31 , and set a position 1000 microns away from the first...

Embodiment 3

[0060] The difference between embodiment three and embodiment one and two is:

[0061] Step 1, take a three-core optical fiber whose length is 3 centimeters, including the first core 11, the second core 12 and the third core 13 whose refractive index is 1.463, the first core 11 and the second core The distance between the centers of the sub-12 and between the centers of the second core 12 and the third core 13 is 25 microns, and the centerlines of the first core 11, the second core 12 and the third core 13 are in a plane Inside, the materials of the first cladding inner 22 and the second cladding inner 23 of the optical fiber are doped with the same doping element P.

[0062] Step 2, configure an ultraviolet laser 4, the ultraviolet laser uses CO 2 laser.

[0063] Step 3: On the three-core optical fiber, choose any position as the first irradiation position 31 , and set a position 300 microns away from the first irradiation position 31 as the second irradiation position 32 ....

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Abstract

The invention discloses an all-fiber flat filter and a fabricating method thereof, belonging to the fields of fiber-optical communication and instruments. The fabricating method comprises the step of irradiating a first to fifth irradiating positions on a three-core optical fiber comprising a first core (11), a second core (12) and a third core (13) with the same refractive index by virtue of an ultraviolet laser (4), thus the refractive indexes of the irradiated positions are consistent with the refractive indexes of the first core, the second core and the third core, a first rat race, a second rat race and a third rat race (51, 52 and 53) which are cascaded are formed in a first cladding (22) and a second cladding (23) of the optical fiber, and the three cascaded rat races, the first core (11) and the third core (13) form the all-fiber flat filter. The invention solves the problem that the flatness of the filter is poor, the fabricating process is simple and flexible, the fabricatedflat filter can be well matched with a communication optical fiber, the connection loss is less, the fabricated flat filter has the advantage of low insertion loss and the like, is easy for encapsulation, and the fabricating cost is low.

Description

technical field [0001] The invention relates to an all-fiber flat filter, which belongs to the fields of optical fiber communication and instrumentation. Background technique [0002] With the continuous development of optical fiber communication technology, optical communication networks need to continuously improve performance and reduce operating costs. The core technology lies in the miniaturization, integration and scale of optical waveguide devices, and future all-optical networks need to be able to A new type of optical waveguide device that realizes various functions. At the same time, with the advent of wavelength division multiplexing (WDM) technology, the communication capacity and transmission rate of optical communication continue to increase. This requires continuous improvement of the performance of optical waveguide devices, especially optical filters. [0003] The optical filter based on the microring resonator meets the above requirements. It has the adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293G02B6/28G02B6/02
Inventor 裴丽刘超宁提纲祁春慧李卓轩高嵩赵瑞峰
Owner BEIJING JIAOTONG UNIV
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