F-P micro-cavity fiber sensor and manufacturing method thereof

A technology of optical fiber sensor and manufacturing method, applied in the direction of converting sensor output, using optical devices to transmit sensing components, instruments, etc., can solve the problems of difficult to accurately control the cavity length, complex assembly process, poor repeatability, etc., to ensure integrity , short processing cycle and low cost

Inactive Publication Date: 2017-03-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of existing F-P cavity manufacturing methods, and provide a method for manufacturing optical fiber F-P microsensors, which is used to solve the problems of poor repeatability of existing F-P cavity manufacturing methods, difficulty in accurately controlling cavity length, complex assembly process, and device failure. Vulnerability, high cost and other issues,

Method used

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  • F-P micro-cavity fiber sensor and manufacturing method thereof
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  • F-P micro-cavity fiber sensor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: A reflective surface is a flat processing method

[0038] (1) Use a cleaver to cut an end face of the optical fiber as a mirror of the F-P microcavity;

[0039] (2) Place the optical fiber on a three-dimensional mobile platform so that the axis of the optical fiber is perpendicular to the incident direction of the laser;

[0040] (3) According to the F-P microcavity parameter requirements, adjust the three-dimensional mobile platform to determine the cavity length;

[0041] (4) Make the laser focus on the core of the fiber through the objective lens of the microscope, feed the laser energy, and form a modulation point of the refractive index at the laser focusing part in the fiber to form another mirror of the F-P microcavity.

[0042] Such as figure 1 As shown, the optical fiber microsensor made is characterized in that it includes a single-mode optical fiber (11), a second reflective mirror (13) on the end face of the single-mode optical fiber cut flat...

Embodiment 2

[0043] Embodiment 2: A reflective surface is a tapered processing method

[0044] (1) Use a fusion splicer to extend the optical fiber into a tapered shape as a mirror of the F-P microcavity;

[0045] (2) Place the optical fiber on a three-dimensional mobile platform so that the axis of the optical fiber is perpendicular to the incident direction of the laser;

[0046] (3) According to the F-P microcavity parameter requirements, adjust the three-dimensional mobile platform to determine the cavity length;

[0047] (4) Make the laser focus on the core of the fiber through the objective lens of the microscope, feed the laser energy, and form a modulation point of the refractive index at the laser focusing part in the fiber to form another mirror of the F-P microcavity.

[0048] Such as figure 2 As shown, the present embodiment is basically the same as the first embodiment, and the special feature is that the second reflective mirror surface (22) is a tapered microsensor, and a...

Embodiment 3

[0049] Embodiment 3: Fabrication of a fiber optic microsensor based on an F-P microcavity

[0050] (1) Place the optical fiber with the end face cut flat on the three-dimensional mobile platform;

[0051] (2) Adjust the three-dimensional mobile platform so that the axis of the optical fiber is perpendicular to the incident direction of the laser;

[0052] (3) Adjust the three-dimensional mobile platform to determine the cavity length;

[0053] (4) Make the laser focus on the core of the fiber through the objective lens of the microscope, feed the laser energy, and form a modulation point of the refractive index at the laser focusing part in the fiber to form another mirror of the F-P microcavity.

[0054] Such as figure 1As shown, the characteristics of the optical fiber microsensor made are that the optical fiber (11) is placed on the three-dimensional mobile platform (32), so that the axis of the optical fiber (11) is perpendicular to the incident direction of the laser be...

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Abstract

The invention discloses a novel F-P micro-cavity fiber sensor and a manufacturing method thereof. A reflecting face is manufactured in the fiber. Two reflecting faces of the F-P micro-cavity fiber sensor are formed by the reflecting face and a fiber end face. The reflecting face is obtained by changing the refraction index of the fiber through a laser function. According to the invention, by controlling pulse energy and a focus point position of the laser, the refraction index is only changed in a set partial fiber core region without damaging the fiber, so integrity of the fiber is ensured; disadvantages in current F-P cavity manufacturing method are overcome; the F-P micro-cavity fiber sensor and the manufacturing method thereof are characterized by high stability, small size, simple structure, easy manufacturing, excellent robustness, interference resistance to server environment and short processing period; quite high flexibility, quite high resolution rate and large-range refraction index sensing are achieved; and the F-P micro-cavity fiber sensor and the manufacturing method have wide application prospects in health detection, biochemical sensing and the like.

Description

technical field [0001] The invention relates to a novel F-P microcavity optical fiber sensor and a manufacturing method thereof, belonging to the field of optical fiber sensing. Background technique [0002] The all-fiber F-P (Fabry-Perot) interferometer sensor has a series of features such as simple structure, small size, light weight, anti-electromagnetic interference, chemical corrosion resistance, high sensitivity, suitable for long-distance measurement, and easy to form a large-scale sensor network. Advantages, has become a research hotspot at home and abroad, and has broad application prospects in aerospace, food safety, air quality monitoring, fire early warning, biomedicine and other industries. As the application field of FP interferometer expands day by day, there are many ways of making it. At present, the main production methods of all-fiber FP interferometers are: [0003] (1) Fusion splicing of ordinary single-mode optical fiber and other different types of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/35312
Inventor 舒学文陈鹏程
Owner HUAZHONG UNIV OF SCI & TECH
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