CN101216354A - Photon crystal optical fibre refractivity temperature sensor and measuring systems - Google Patents
Photon crystal optical fibre refractivity temperature sensor and measuring systems Download PDFInfo
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- CN101216354A CN101216354A CNA2008100651755A CN200810065175A CN101216354A CN 101216354 A CN101216354 A CN 101216354A CN A2008100651755 A CNA2008100651755 A CN A2008100651755A CN 200810065175 A CN200810065175 A CN 200810065175A CN 101216354 A CN101216354 A CN 101216354A
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Abstract
The invention provides a photonic crystal fiber refractive index temperature sensor measurement system, which comprises a light source, a photonic crystal fiber refractive index temperature sensor and an optical power meter, wherein, a light beam emitted by the light source is coupled into the photonic crystal fiber refractive index temperature sensor for refracting the light beam; the optical power meter is used for measuring the intensity of the light beam in the photonic crystal fiber refractive index temperature sensor to measure the temperature via the change of the intensity of the photonic crystal fiber refractive index temperature sensor. The temperature can be measured by the photonic crystal fiber refractive index temperature sensor according to the change of the output optical power of the fiber by filling a medium with a temperature-sensitive refractive index in the photonic crystal fiber, so that the intensity distribution of an optical field in the photonic crystal fiber changes as the temperature changes, which results in change of transmission loss of light beam, therefore, greatly improving the sensitivity of the photonic crystal fiber refractive index temperature sensor.
Description
Technical field
The present invention relates to a kind of temperature sensor, particularly relate to the photon crystal optical fibre refractivity temperature sensor that the index modulation of utilizing the photonic crystal fiber covering is made.
Background technology
The refringence of fiber core and covering has determined numerical aperture, the loss of control optical fiber.The numerical aperture of optical fiber is subjected to the modulation of temperature, and promptly the light collecting light ability of optical fiber is subjected to the modulation of environment temperature, after the photodetector system demodulation, can obtain the temperature value of measured object.The index fiber temperature sensor is exactly to vary with temperature the temperature sensor that can cause that principle that transmission luminous energy loss changes is made according to the fibre cladding refractive index, and temperature is measured in the change of the luminous power by measuring optical fiber output.
Traditional index fiber temperature sensor normally earlier erodes quartzy covering, change material substitution covering with the refractive index temperature sensitivity, make optical fiber sensing head (Zhang Hongan, Shen Weimin, the research of fibre optic temperature sensor superpolymer sensor information, photoelectron laser, 1996,7 (6): 337-340), its shortcoming is the etching process complexity, and corrosion depth is difficult to control; Perhaps two fused fiber splices are made the optical fiber sensing head together, as utility model patent (application number: 92229667.7), be to adopt macromolecule temperature sensing material a kind of and that optical fibre refractivity is complementary to be coated in two outside of fiber that are welded together, luminous energy is imported behind this reflecting surface by another root optical fiber output by an optical fiber.Owing to be together with two fused fiber splices, also need optical fiber is destroyed, the consistance of sensor is difficult to control.
Summary of the invention
The present invention provides a kind of based on measuring the photon crystal optical fibre refractivity temperature sensor of temperature by measuring optical information in order to overcome above-mentioned the deficiencies in the prior art.
The present invention provides a kind of based on measuring the photon crystal optical fibre refractivity temperature sensor measuring system of temperature by measuring optical information in order to overcome above-mentioned the deficiencies in the prior art.
The technical solution adopted for the present invention to solve the technical problems is: a kind of photonic crystal fiber is provided, it comprise fibre core and around the fibre core along the small pore of axial array, be filled with the refractive index temperature sensitive materials in this small pore.
The scheme that the present invention solves further technical matters is: described small pore arrangement architecture with and the refractive index of inner material of filling with the test request setting.
The technical solution adopted for the present invention to solve the technical problems is: a kind of photon crystal optical fibre refractivity temperature sensor measuring system is provided, it comprises light source, photon crystal optical fibre refractivity temperature sensor and light power meter, what described light source sent couples light in this photon crystal optical fibre refractivity temperature sensor, this photon crystal optical fibre refractivity temperature sensor reflects light, this light power meter is measured the light intensity of the bright dipping in this photon crystal optical fibre refractivity temperature sensor, and the light intensity by photon crystal optical fibre refractivity temperature sensor changes measures temperature.
The scheme that the present invention solves further technical matters is: light source can be selected laser instrument or light emitting diode for use.
The scheme that the present invention solves further technical matters is: described photon crystal optical fibre refractivity temperature sensor comprise fibre core and around the fibre core along the small pore of axial array.
The scheme that the present invention solves further technical matters is: be filled with the refractive index temperature sensitive materials in this small pore.
The scheme that the present invention solves further technical matters is: described small pore arrangement architecture with and inner material of filling with the test request setting.
The scheme that the present invention solves further technical matters is: the material of filling the refractive index temperature sensitivity in the described photon crystal optical fibre refractivity temperature sensor, change the temperature characterisitic of photon crystal optical fibre refractivity temperature sensor, improve the sensitivity of photon crystal optical fibre refractivity temperature sensor.
Compared to prior art, this photon crystal optical fibre refractivity temperature sensor is by filling the medium of refractive index temperature sensitivity in photonic crystal fiber, relation according to light-transfer characteristic in the photonic crystal fiber and temperature, utilize the temperature coefficient of filling material refractive index different with the photonic crystal fiber material, the distribution of light intensity distribution changes in the photonic crystal fiber when temperature variation, the loss that causes light changes, temperature is measured in the change of the luminous power by optical fiber output, has improved the sensitivity of photon crystal optical fibre refractivity temperature sensor greatly.
Description of drawings
Fig. 1 is the structural representation of photon crystal optical fibre refractivity temperature sensor of the present invention.
Fig. 2 is the structural representation of photon crystal optical fibre refractivity temperature sensor measuring system of the present invention.
Embodiment
The invention provides a kind of photon crystal optical fibre refractivity temperature sensor, it is the medium of filling the refractive index temperature sensitivity in the photonic crystal fiber micropore, the distribution of light intensity distribution changes in the photonic crystal fiber when temperature variation, the loss that causes light changes, and measures a kind of fibre optic temperature sensor of temperature by measuring optical information.
Seeing also Fig. 1, is the optical fiber cross section principle schematic of photon crystal optical fibre refractivity temperature sensor of the present invention.
Described photon crystal optical fibre refractivity temperature sensor, it comprise fibre core 11 and around the fibre core along axial regularly arranged small pore 21.By the constraint of 21 pairs of light of these small pores, realize the conduction of light in optical fiber.Photon crystal optical fibre refractivity temperature sensor and ordinary optic fibre temperature sensor difference have structurally determined aspects such as its unimodular property, dispersion characteristics and nonlinear characteristic and ordinary optic fibre that significant difference is arranged.The another one key property of this photon crystal optical fibre refractivity temperature sensor is, because the material of the filling refractive index temperature sensitivity in can the small pore in photonic crystal fiber, can increase the action length of transmission light and gas or liquid like this, and can adjust the structural parameters of photonic crystal fiber as required, photon crystal optical fibre refractivity temperature sensor is carried out freely designing.The present invention is the material of filling the refractive index temperature sensitivity at photon crystal optical fibre refractivity temperature sensor, changes the temperature characterisitic of photonic crystal fiber, the sensitivity that improves fibre optic temperature sensor.
Seeing also Fig. 2, is photon crystal optical fibre refractivity temperature sensor measuring system structural representation of the present invention.
This photon crystal optical fibre refractivity temperature sensor measuring system comprises light source 21, photon crystal optical fibre refractivity temperature sensor 22 and photo-detector 23.
During work, the photonic crystal fiber of having filled the refractive index temperature sensitive materials is placed the temperature field, shown in the arrow among the figure, the light that light source 21 sends is in being coupled to photon crystal optical fibre refractivity temperature sensor 22, measure light intensity with photo-detector 23, variation of temperature can cause that the loss of light changes, thereby realizes the measurement to temperature.
The invention has the beneficial effects as follows, this photon crystal optical fibre refractivity temperature sensor and measuring system are by filling the medium of refractive index temperature sensitivity in photonic crystal fiber, relation according to light-transfer characteristic in the photonic crystal fiber and temperature, utilize the temperature coefficient of filling material refractive index different with the photonic crystal fiber material, the distribution of light intensity distribution changes in the photonic crystal fiber when temperature variation, the loss that causes light changes, and temperature is measured in the change of the luminous power by optical fiber output.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. photon crystal optical fibre refractivity temperature sensor is characterized in that: it comprise fibre core and around fibre core along the small pore of axial array, be filled with the refractive index temperature sensitive materials in this small pore.
2. photon crystal optical fibre refractivity temperature sensor according to claim 1 is characterized in that: described small pore arrangement architecture with and inner material of filling with the test request setting.
3. photon crystal optical fibre refractivity temperature sensor measuring system, it is characterized in that: it comprises light source, photon crystal optical fibre refractivity temperature sensor and light power meter, what described light source sent couples light in this photon crystal optical fibre refractivity temperature sensor, this photon crystal optical fibre refractivity temperature sensor reflects light, this light power meter is measured the light intensity of the bright dipping in this photon crystal optical fibre refractivity temperature sensor, and the light intensity by photon crystal optical fibre refractivity temperature sensor changes measures temperature.
4. photon crystal optical fibre refractivity temperature sensor measuring system according to claim 3 is characterized in that: light source can be selected laser instrument or light emitting diode for use.
5. photon crystal optical fibre refractivity temperature sensor measuring system according to claim 3 is characterized in that: described photon crystal optical fibre refractivity temperature sensor comprise fibre core and around the fibre core along the small pore of axial array.
6. photon crystal optical fibre refractivity temperature sensor measuring system according to claim 5 is characterized in that: be filled with the refractive index temperature sensitive materials in this small pore.
7. photon crystal optical fibre refractivity temperature sensor measuring system according to claim 6 is characterized in that: described small pore arrangement architecture with and the refractive index of inner material of filling with the test request setting.
8. photon crystal optical fibre refractivity temperature sensor measuring system according to claim 7, it is characterized in that: the material of filling the refractive index temperature sensitivity in the described photon crystal optical fibre refractivity temperature sensor, change the temperature characterisitic of photon crystal optical fibre refractivity temperature sensor, improve the sensitivity of photon crystal optical fibre refractivity temperature sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100651755A CN101216354A (en) | 2008-01-11 | 2008-01-11 | Photon crystal optical fibre refractivity temperature sensor and measuring systems |
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| CNA2008100651755A CN101216354A (en) | 2008-01-11 | 2008-01-11 | Photon crystal optical fibre refractivity temperature sensor and measuring systems |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852656A (en) * | 2010-06-02 | 2010-10-06 | 中国计量学院 | High-sensitivity temperature sensor and device based on partially-perfused HiBi-PCF-FLM (Highly Birefringent-Photonic Crystal Fiber-Fiber Loop Mirror) |
| CN102183815A (en) * | 2011-06-14 | 2011-09-14 | 华北电力大学（保定） | Photonic crystal filled with material with refractive index sensitive to temperature and manufacturing method thereof |
| CN102243113A (en) * | 2011-06-22 | 2011-11-16 | 天津大学 | Photonic crystal fiber grating temperature sensor with tunable wavelength |
| CN102252777A (en) * | 2011-04-21 | 2011-11-23 | 上海理工大学 | Optical fiber temperature detector based on one-dimensional photonic crystal defect mode |
| CN102410886A (en) * | 2011-08-30 | 2012-04-11 | 深圳大学 | Fiber temperature sensor and measuring system thereof and signal processing method of system |
| CN102466528A (en) * | 2010-11-11 | 2012-05-23 | 香港理工大学 | Method for measuring refractive index and temperature, optical fiber sensor and corresponding manufacturing method |
| CN102590932A (en) * | 2012-03-14 | 2012-07-18 | 天津理工大学 | Liquid crystal doped photonic crystal fiber sensing model with novel structure |
| CN103149176A (en) * | 2013-02-27 | 2013-06-12 | 大连理工大学 | Multichannel refractive index sensor with integration of chirp two-dimensional photonic crystal waveguide and micro-flow channel |
| CN107907237A (en) * | 2017-11-15 | 2018-04-13 | 江西师范大学 | Optical absorption type temperature sensor |
| CN113138035A (en) * | 2021-04-22 | 2021-07-20 | 东北大学 | Temperature sensor and temperature measurement system based on optical fiber dispersion wave |
-
2008
- 2008-01-11 CN CNA2008100651755A patent/CN101216354A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852656A (en) * | 2010-06-02 | 2010-10-06 | 中国计量学院 | High-sensitivity temperature sensor and device based on partially-perfused HiBi-PCF-FLM (Highly Birefringent-Photonic Crystal Fiber-Fiber Loop Mirror) |
| CN101852656B (en) * | 2010-06-02 | 2012-04-25 | 中国计量学院 | Temperature sensor based on partially-perfused HiBi-PCF-FLM (Highly Birefringent-Photonic Crystal Fiber-Fiber Loop Mirror) |
| CN102466528A (en) * | 2010-11-11 | 2012-05-23 | 香港理工大学 | Method for measuring refractive index and temperature, optical fiber sensor and corresponding manufacturing method |
| CN102252777A (en) * | 2011-04-21 | 2011-11-23 | 上海理工大学 | Optical fiber temperature detector based on one-dimensional photonic crystal defect mode |
| CN102252777B (en) * | 2011-04-21 | 2012-12-05 | 上海理工大学 | Optical fiber temperature detector based on one-dimensional photonic crystal defect mode |
| CN102183815A (en) * | 2011-06-14 | 2011-09-14 | 华北电力大学（保定） | Photonic crystal filled with material with refractive index sensitive to temperature and manufacturing method thereof |
| CN102243113A (en) * | 2011-06-22 | 2011-11-16 | 天津大学 | Photonic crystal fiber grating temperature sensor with tunable wavelength |
| CN102410886A (en) * | 2011-08-30 | 2012-04-11 | 深圳大学 | Fiber temperature sensor and measuring system thereof and signal processing method of system |
| CN102410886B (en) * | 2011-08-30 | 2014-02-05 | 深圳大学 | Fiber temperature sensor and measuring system thereof and signal processing method of system |
| CN102590932A (en) * | 2012-03-14 | 2012-07-18 | 天津理工大学 | Liquid crystal doped photonic crystal fiber sensing model with novel structure |
| CN103149176A (en) * | 2013-02-27 | 2013-06-12 | 大连理工大学 | Multichannel refractive index sensor with integration of chirp two-dimensional photonic crystal waveguide and micro-flow channel |
| CN103149176B (en) * | 2013-02-27 | 2014-10-15 | 大连理工大学 | Multichannel refractive index sensor with integration of chirp two-dimensional photonic crystal waveguide and micro-flow channel |
| CN107907237A (en) * | 2017-11-15 | 2018-04-13 | 江西师范大学 | Optical absorption type temperature sensor |
| CN113138035A (en) * | 2021-04-22 | 2021-07-20 | 东北大学 | Temperature sensor and temperature measurement system based on optical fiber dispersion wave |
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Application publication date: 20080709 |