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Optical fiber fused taper-based intrinsic Fabry-Perot device and manufacturing method thereof

An intrinsic type, optical fiber technology, applied in the field of optical fiber devices, can solve the problems of incomplete reversibility, long response time, stability and reliability disadvantages, etc., achieve high space selectivity, simple device structure, and improve sensing sensitivity and the effect of response speed

Active Publication Date: 2012-06-20
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to achieve accurate quantitative detection by relying solely on fiber optic fusion cones for sensing. Based on this, researchers often coat their surfaces with sensitive materials that respond to environmental changes, but coating materials usually have certain incomplete reversibility or require relatively Long response time, so the coated optical fiber fusion cone sensor has certain disadvantages in stability and reliability

Method used

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  • Optical fiber fused taper-based intrinsic Fabry-Perot device and manufacturing method thereof
  • Optical fiber fused taper-based intrinsic Fabry-Perot device and manufacturing method thereof
  • Optical fiber fused taper-based intrinsic Fabry-Perot device and manufacturing method thereof

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Effect test

Embodiment 1

[0026] see figure 1 , the intrinsic type Fabry-Perot device based on the optical fiber fusion cone, including a fiber fusion cone, characterized in that the fiber fusion cone includes two sections of ordinary optical fiber (1), two sections of fiber fusion cone transition zone ( 2), a section of optical fiber fusion cone waist (3), a first optical fiber internal reflection mirror (4) and a second optical fiber internal reflection mirror (5), the optical fiber fusion cone is obtained by melting and drawing an ordinary single-mode optical fiber The first optical fiber internal reflector (4) and the second optical fiber internal reflector (5) are made of femtosecond pulse laser along the radial direction of the inner core (3) of the fiber melting cone waist in the optical fiber The reflective surface formed by changing the refractive index of the optical fiber at the waist of the melting cone; the diameter of the waist of the optical fiber melting cone (3) is 10-50 μm; the inter...

Embodiment 2

[0028] see figure 2 , the manufacturing method of the intrinsic type Fabry-Perot device based on the optical fiber fusion cone is used to manufacture the optical fiber fusion cone according to the first embodiment. Use the hydrogen-oxygen flame as the heat source (6) for melting and tapering: take a section of single-mode optical fiber (7) about 2 meters long, and peel off the coating layer about 1 cm long in the middle of the single-mode optical fiber, and wipe it clean with alcohol The single-mode optical fiber to be used in the bare fiber part (8) is placed on the fiber holder (9) with a distance of 3 cm. One end of the pigtail is connected to the broadband light source (10), and the other end is connected to the optical power meter (11) for Monitor the loss change of the fused optical fiber during the stretching process, and optimize the settings of parameters such as the stretching speed, stretching length, and hydrogen flow rate of the heat source. The diameter of the ...

Embodiment 3

[0030] see image 3 , the manufacturing method of the intrinsic type Fabry-Perot device based on the fiber fusion cone is used to make the optical fiber Fabry-Perot cavity written on the waist of the fiber fusion cone by using the femtosecond laser according to the first embodiment . The prepared optical fiber fusion cone (12) is placed on a three-dimensional mobile platform (13), so that the axis of the optical fiber fusion cone (12) is perpendicular to the transmission direction of the femtosecond pulsed laser beam (14). The femtosecond pulse laser (15) is focused on the center of the fiber fusion cone waist through the objective lens (16) of the microscope, and the three-dimensional mobile platform moves along the transmission direction of the femtosecond pulse laser, so that the focal point of the femtosecond pulse laser scans the fiber radially The waist of the melting cone makes the femtosecond laser writing area cover the core of the fiber melting cone waist area, that...

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Abstract

The invention provides an optical fiber fused taper-based intrinsic Fabry-Perot device and a manufacturing method thereof. The optical fiber fused taper-based intrinsic Fabry-Perot device comprises an optical fiber fused taper, wherein a first optical fiber internal reflection mirror and a second optical fiber internal reflection mirror are arranged in the optical fused fiber taper and radially change the reflection faces formed by reflection rates at the fiber core respectively along the interior of the optical fiber taper waist through femtosecond pulse laser. The diameter of the optical fiber fused taper is 10 to 50 microns; the distance between the first and second optical fiber internal reflection mirrors is 50 to 6000 microns. The device combines the high sensitivity characteristicscaused by a strong evanescent field of the optical fiber fused taper and easy detection characteristics of resonance peak shift for sensing of a Fabry-Perot cavity and enhances the sensitivity, response speed and reliability of an optical fiber sensor. The manufacturing method of the device is to etch the Fabry-Perot cavity by femtosecond pulse laser after adopting optical fiber biconical taper. Moreover, the device provided by the invention is simple and stable in structure, low in cost and high in repeatability and has the advantages of easy for batch processing of the device and the like. The device and method provided by the invention have broad application prospect in miniaturized and high-sensitive sensing areas.

Description

technical field [0001] The invention relates to an intrinsic type Fabry-Perot device based on an optical fiber fusion cone and a manufacturing method thereof, belonging to the field of optical fiber devices. Background technique [0002] Optical fiber devices are widely used in the fields of optical fiber sensing and optical communication networks. Among them, optical fiber sensing devices are one of the small-sized sensing heads that are currently practical. They have anti-electromagnetic interference, anti-radiation, high sensitivity, light weight, insulation and explosion-proof Excellent properties such as corrosion resistance, especially the small size of the optical fiber and good optical transmission characteristics, will become an important choice for the preparation of networked micro-sensors with excellent performance. Therefore, it is favored and valued at home and abroad. The development trend of optical fiber sensors is miniaturization and high performance. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/28G02B6/255G01D5/353B23K26/36B23K26/362
Inventor 张小贝李金龙王文辕殷赵辉李迎春庞拂飞刘云启王廷云
Owner SHANGHAI UNIV
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