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Optical fiber F-P filter and preparation method thereof

A filter and optical fiber technology, which is applied in the field of optical fiber F-P filter and its preparation, can solve the problems of angle, translational dislocation, etc., and achieve the effects of improving filtering performance, solving end face offset dislocation, and convenient operation

Active Publication Date: 2017-10-13
菏泽市新世纪电子技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems in the prior art, the present invention proposes an optical fiber F-P filter and a preparation method thereof. The preparation method is simple in process and operation, and solves the problem that translational dislocation or even an included angle is easily generated during the processing of the end face of the existing optical fiber F-P cavity. The cascading pitch of the optical fiber F-P cavity is reduced, and the miniaturization of the cascaded filter is realized

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  • Optical fiber F-P filter and preparation method thereof
  • Optical fiber F-P filter and preparation method thereof
  • Optical fiber F-P filter and preparation method thereof

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preparation example Construction

[0032] The preparation method of the present invention specifically comprises the following steps:

[0033] 1) Stripping the coating layer of the optical fiber to obtain the fiber core, and cleaning with alcohol;

[0034] 2) Fix the fiber core on the glass slide, place the glass slide on the three-dimensional precision micro-motion platform, start the excimer laser, and adjust the three-dimensional precision micro-motion platform and the optical system to focus the laser spot on the central axis of the fiber core Location;

[0035] 3) Set the number of pulses of the excimer laser to 300 to 1000 times, the output wavelength of the excimer laser to 193nm, the pulse energy to 10 to 30mJ, and the frequency to 300Hz, and set the stepping movement value of the three-dimensional precision micro-motion platform to 0.5 to 4mm After the excimer laser is operated to drill the first microhole on the fiber core, the three-dimensional precision micro-motion platform drives the fiber core t...

Embodiment 1

[0040] Take a section of ordinary single-mode optical fiber, strip off the local coating layer by 5-10mm, and then fix it on the three-dimensional precision micro-motion platform. Through the controller, preliminarily adjust the X-axis (left-right direction) and Y-axis (front-rear direction) of the three-dimensional precision micro-motion platform, so that the uncoated area of ​​the optical fiber is in the center of the field of view; then adjust the Z-axis of the three-dimensional precision micro-motion platform ( Up and down directions), so that the laser spot falls on the fiber; fine-tune the X-axis, Y-axis and Z-axis of the three-dimensional precision micro-motion platform again, so that the laser spot is focused on the center of the fiber; select the punching method (circular hole, rectangular hole, triangular hole), set the number of pulses output by the laser (300-1000), turn on the control switch for micro-hole processing, and the controller will stop after automatic co...

Embodiment 2

[0043] Processing multiple microholes at equal intervals on the optical fiber, Figure 6a and Figure 6b They are the top view and side view of the fabricated multi-fiber F-P cavity cascade filter respectively. During the production process, the stepping movement value of the platform in Example 1 is set to 3.5mm, then the first hole and the second hole can be realized The distance between the two holes is 3.5mm, and the distance between the second hole and the third hole is also 3.5mm. In this way, two optical fiber F-P filters with a cavity length of 3.5mm are cascaded to form a multi-fiber F-P cavity. Cascaded filter, its corresponding spectrum is as Figure 7 As shown, the free spectrum corresponding to its spectrum is 0.113nm, and the contrast is 5dBm.

[0044] According to the method described in embodiment 1 and embodiment 2, the porous structure optical fiber F-P filter can be processed on the optical fiber, Figure 8a It is the spectrogram of a cascaded F-P filter ...

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Abstract

The invention discloses an optical fiber F-P filter and a preparation method thereof, and solves the problems that translational dislocation and even inclined angle are liable to occur in the end surface processing course of the present optical fiber F-P cavity so that cascade spacing of the optical fiber F-P cavity can be reduced and miniaturization of the cascade filter can be realized. The adopted technical scheme is that two or more than two micron-scale holes are continuously carved on one optical fiber core in one step by using the excimer laser to manufacture a single optical fiber F-P filter or a cascade optical fiber F-P filter, the optical fiber end surface is replaced by the micron holes and the air medium is replaced by the optical fiber core so that transmission light is enabled to be reflected for multiple times between the micron holes to form interference, a pair of micron holes form the single optical fiber F-P filter, and multiple micron holes form the cascade optical fiber F-P filter.

Description

technical field [0001] The invention belongs to the field of optical fiber communication devices and optical fiber sensor devices, and in particular relates to an optical fiber F-P filter and a preparation method thereof. Background technique [0002] Interferometric filter devices play an extremely important role in the field of optical fiber communication technology and optical fiber sensing. sense detection. There are many types of optical filters with different functions. Common optical fiber filters include Mach-Zehnder interference type, Michelson interference type, optical fiber F-P cavity interference type, and Sagnac interference type. These fiber-optic devices have played important advantages in the fields of signal frequency stabilization, frequency selection, filtering, and physical quantity sensing and monitoring. Especially with the organic combination of optical fiber technology and new functional material technology, the research and application of optical ...

Claims

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Application Information

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IPC IPC(8): G02B6/293
CPCG02B6/29358
Inventor 刘颖刚刘鑫梁星马成举韩党卫杨武海
Owner 菏泽市新世纪电子技术有限公司
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