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High-sensitivity micro-nano fiber compound type microcavity biochemical sensor and manufacture method thereof

A biochemical sensor and micro-nano optical fiber technology, applied in the field of optical fiber devices, can solve the problems of slow response speed and low sensitivity, and achieve the effects of fast response speed, wide application prospects and high sensitivity

Inactive Publication Date: 2013-03-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve the existing F-P cavity and various sensors based on the F-P cavity, which have low sensitivity and slow response speed, and provide a high-sensitivity micro-nano optical fiber composite micro-cavity biochemical sensor and its manufacturing method to realize Higher sensitivity, faster response speed and trace detection, which will have broad application prospects in the field of miniaturization and high-sensitivity biochemical sensing

Method used

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  • High-sensitivity micro-nano fiber compound type microcavity biochemical sensor and manufacture method thereof
  • High-sensitivity micro-nano fiber compound type microcavity biochemical sensor and manufacture method thereof
  • High-sensitivity micro-nano fiber compound type microcavity biochemical sensor and manufacture method thereof

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Effect test

Embodiment 1

[0022] see figure 1 , the high-sensitivity micro-nano optical fiber composite microcavity biochemical sensor consists of a micro-nano optical fiber (4) and a first optical fiber internal reflection mirror (1), a second optical fiber internal reflection mirror (2), a micro-nano optical fiber (4), and a micro-nano optical fiber (4). An optical fiber F-P cavity (3) and a junction-type micro-nano optical fiber ring cavity (5) are formed. The micro-nano optical fiber (4) is made by flame processing a single-mode optical fiber, and the first optical fiber internal reflection mirror (1) and the second optical fiber internal reflection mirror (2) are respectively processed by femtosecond pulsed laser along the micro-nano optical fiber ( 4) The radial direction of the inner fiber core changes the reflective surface formed by the refractive index of the fiber. Then tie a knot between the two mirrors, and finally make a micro-nano-fiber composite microcavity composed of a micro-nano fi...

Embodiment 2

[0024] see figure 2 , the manufacturing method of the high-sensitivity micro-nano fiber composite microcavity biochemical sensor is used to make the micro-nano fiber according to the first embodiment. Use oxyhydrogen flame (6) as heat source to a section of 2 meters long A 0.2-meter single-mode optical fiber (7) is fused to make a micro-nano optical fiber: strip a length of 3 cm in the middle of the single-mode optical fiber 0.3 cm coating layer, and wipe the bare fiber part (8) with alcohol, place it on the fiber holder (9) with a distance of 5 cm, connect one end of the pigtail to the broadband light source (10), and connect the other end to the optical power meter (11), used to monitor the loss change of the single-mode fiber during the melting process. Through optimal setting of parameters such as the hydrogen flow rate of the heat source and the flame temperature, it can be ensured that the prepared micro-nano optical fiber (12) has good uniformity.

Embodiment 3

[0026] see image 3 , the manufacturing method of the high-sensitivity micro-nano-fiber composite microcavity biochemical sensor is used to make the F-P cavity written inside the micro-nano fiber by femtosecond laser according to the first embodiment. The prepared micro-nano fiber (12) is placed on the three-dimensional mobile platform (13), so that the axis of the micro-nano fiber (12) is perpendicular to the transmission direction of the femtosecond pulsed laser beam (14); the femtosecond pulsed laser (15) passes through The objective lens (16) of the microscope is focused on the center of the waist of the fiber fusion cone, 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 waist of the fiber fusion cone along the radial direction of the optical fiber to reach the femtosecond pulse laser. The second laser writing area covers the fiber core of the fi...

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Abstract

The invention relates to a high-sensitivity micro-nano fiber compound type microcavity biochemical sensor. The biochemical sensor consists of a knot type micro-ring resonant cavity and a compound type microcavity, wherein the knot type micro-ring resonant cavity is made of micro-nano fibers, and the compound type microcavity consists of F-P microcavities formed in a manner that a femtosecond laser acts on two sides of the micro-ring resonant cavity. The manufacture method of the biochemical sensor comprises the following steps of: fusing a normal single mode fiber to prepare the micro-nano fiber, manufacturing two reflection mirrors in the micro-nano fiber by the femtosecond laser, and knotting between the two reflection mirrors, thus finally preparing a micro-nano fiber compound type microcavity formed by a micro-nano fiber F-P cavity and a knot type micro-nano fiber ring cavity. The micro-nano fiber compound type microcavity related to the invention has a huge change slope at a central wavelength position due to a Fano resonance spectral line, the tiny environmental parametric variation can be transformed into detectable intensity variation by a steep slope, and the sensitivity of the biochemical sensor can be greatly improved, so that the fast response speed and high-sensitivity micro-nano order biochemical measurement can be realized.

Description

technical field [0001] The invention relates to a high-sensitivity micro-nano fiber composite microcavity biochemical sensor and a manufacturing method thereof, belonging to the field of optical fiber devices. technical background [0002] Since the last century, the fields of optical fiber communication and optical fiber sensing have developed rapidly. Optical fiber and optical fiber devices are the transmission media of optical fiber sensing, and their development level determines the development of optical fiber sensing field to a large extent. Optical fiber sensors have strong anti-interference ability, good insulation, high safety, high sensitivity, light weight, small size and easy integration, so they have broad application prospects in many industries such as energy petrochemical, resource exploration, biomedical and other fields. With the rapid development of the field of optical fiber sensing, the requirements for optical fiber devices are getting higher and highe...

Claims

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Application Information

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IPC IPC(8): G01N21/41
Inventor 张小贝殷赵辉杨萍庞拂飞刘云启王廷云
Owner SHANGHAI UNIV
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