Intrinsic optical fiber Fabry-Perot temperature sensor manufactured by femtosecond pulse laser and manufacturing method of temperature sensor

A technology of temperature sensor and femtosecond pulse, which is applied in the direction of physical/chemical change thermometers, thermometers, cladding optical fibers, etc., can solve problems such as difficult reuse, restrict rapid development, complex manufacturing process, etc., to ensure integrity, The effect of improving the ability to resist harsh environments

Inactive Publication Date: 2011-10-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the existing optical fiber sensor has the characteristics of small size, light weight, high sensitivity, low power consumption, anti-electromagnetic interference and corrosion resistance, it is difficult to meet the requirements of technology, The requirements of production and living fields restrict the further rapid development of these fields

Method used

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  • Intrinsic optical fiber Fabry-Perot temperature sensor manufactured by femtosecond pulse laser and manufacturing method of temperature sensor
  • Intrinsic optical fiber Fabry-Perot temperature sensor manufactured by femtosecond pulse laser and manufacturing method of temperature sensor
  • Intrinsic optical fiber Fabry-Perot temperature sensor manufactured by femtosecond pulse laser and manufacturing method of temperature sensor

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Experimental program
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Embodiment 1

[0025] see figure 1 , the intrinsic fiber-optic F-P temperature sensor prepared by the present femtosecond pulsed laser, including an optical fiber (4), in which there is a first optical fiber internal reflection mirror (1) and a second optical fiber internal reflection mirror (2), The first optical fiber internal reflection mirror (1) and the second optical fiber internal reflection mirror (2) are respectively formed by changing the refractive index at the core of the single-mode optical fiber core (3) along the radial direction of the femtosecond pulsed laser; The distance between the first optical fiber internal reflection mirror (1) and the second optical fiber internal reflection mirror (2) is 50-5000 μm.

Embodiment 2

[0027] The manufacturing method of the intrinsic fiber-optic F-P temperature sensor prepared by the femtosecond pulse laser is used to make the intrinsic-type fiber-optic F-P temperature sensor prepared by the femtosecond pulse laser described in Embodiment 1, and its operation method is as follows:

[0028] 1) Place the optical fiber (4) on the three-dimensional mobile platform so that the axis of the optical fiber (4) is perpendicular to the transmission direction of the femtosecond pulse laser;

[0029] 2) The femtosecond pulsed laser is focused on the fiber core through the objective lens of the microscope;

[0030] 3) The three-dimensional mobile platform moves along the transmission direction of the femtosecond pulsed laser, so that the focal point of the femtosecond pulsed laser scans the fiber core along the radial direction of the fiber;

[0031] 4) When making a fiber optic internal mirror, the moving distance of the three-dimensional mobile platform is 12 μm, and th...

Embodiment 3

[0033] see figure 2 , an intrinsic fiber optic F-P temperature sensing device, comprising a light source (5), the light source (5) connected to a fiber optic circulator (6), and an interface of the fiber optic circulator (6) connected to an embodiment 1 The intrinsic fiber optic F-P temperature sensor (7) prepared by the femtosecond pulsed laser, another interface is connected to a spectrum analyzer (8); the light source (5) shown is a 1550nm broadband light source, and a fiber optic circulator (6) It is a 1550nm fiber optic circulator; the light emitted by the light source (5) is guided through the fiber optic circulator (6) into an intrinsic fiber-optic F-P temperature sensor (7) prepared by a femtosecond pulse laser; The intrinsic type optical fiber F-P temperature sensor (7) finally displays the collected external temperature signal on the optical spectrum analyzer (8) through the optical fiber circulator (6).

[0034] image 3 and Figure 4 These are the reflection in...

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Abstract

The invention provides an intrinsic optical fiber Fabry-Perot temperature sensor manufactured by a femtosecond pulse laser and a manufacturing method of the temperature sensor. The intrinsic optical fiber Fabry-Perot temperature sensor manufactured by the femtosecond pulse laser comprises an optical fiber, wherein a first optical fiber inner reflector and a second optical fiber inner reflector are arranged in the optical fiber; the first optical fiber inner reflector and the second optical fiber inner reflector are formed by changing a refractive index at a fiber core along the radial direction of a single-mode optical fiber core through the femtosecond pulse laser respectively; and the distance between the first optical fiber inner reflector and the second optical fiber inner reflector is 50 to 5,000mu m. The sensor has the characteristics of severe environment resistance, high stability and low loss, is easy to multiplex with an optical fiber communication network, has a simple optical path and is easy to implement, an optical fiber to be processed is not needed to be doped or sensitized, and a formed optical fiber Fabry-Perot structure is permanent and is difficult to disappear.

Description

technical field [0001] The invention relates to an intrinsic optical fiber F-P temperature sensor prepared by a femtosecond pulse laser and a manufacturing method thereof, belonging to the field of optical fiber sensing. Background technique [0002] With the rapid development of photoelectric detection technology, people put forward higher requirements for optical fiber sensors. Although the existing optical fiber sensor has the characteristics of small size, light weight, high sensitivity, low power consumption, anti-electromagnetic interference and corrosion resistance, it is difficult to meet the requirements of technology, The requirements of production and living fields restrict the further rapid development of these fields. [0003] Using femtosecond pulse laser for micromachining, because of its extremely narrow pulse width, it can obtain extremely high instantaneous power under the condition of very low single pulse energy, and inject a large amount of energy into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G02B6/02G02B5/08
Inventor 王廷云王文辕庞拂飞陈娜朱姗文建湘蓝鲁刚丁丁李康
Owner SHANGHAI UNIV
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