CN204924487U - Photonic crystal optic fibre mach - once is temperature sensor of interferometer morally based on corrosion treatment - Google Patents
Photonic crystal optic fibre mach - once is temperature sensor of interferometer morally based on corrosion treatment Download PDFInfo
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- CN204924487U CN204924487U CN201520276291.7U CN201520276291U CN204924487U CN 204924487 U CN204924487 U CN 204924487U CN 201520276291 U CN201520276291 U CN 201520276291U CN 204924487 U CN204924487 U CN 204924487U
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Abstract
The utility model provides a photonic crystal optic fibre mach - once is temperature sensor of interferometer morally based on corrosion treatment, its characterized in that comprises broadband light source 1, transmission fiber 2, sensing head 3, temperature control case 4, transmission fiber 5, spectrum appearance 6, through the photonic crystal optic fibre constitution sensing head 3 that corrodes, the one end of sensing head 3 is passed through transmission fiber 2 and is linked to each other with broadband light source 1, and the other end passes through transmission fiber 5 and links to each other with spectrum appearance 6, the utility model discloses the structure is exquisite, can be used to adverse circumstances such as high pressure, electrical noise, high temperature, corruption.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, be specifically related to a kind of temperature sensor of the photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment.
Background technology
Sensor obtains in extraneous various information help people the vital role do not replaced, and is widely used in the every field such as industry, agricultural, forestry.Along with the development of modern science and technology, the requirement of people to sensor is more and more higher, and some new mechanism and high sensor make the research in some fields create breakthrough progress.In recent years, Fibre Optical Sensor, as the novel sensor of a class, more and more received the concern of people.Compared with other sensor, Fibre Optical Sensor volume is little, can use, and can measure multiple physical quantity in the rugged surroundings such as high pressure, strong-electromagnetic field.
Photonic crystal fiber (photoniccrystalfibers, be called for short PCF) be made up of quartz material, the optical fiber of periodic distribution that to be a kind of specific inductive capacity be, the order of magnitude of its period of change reaches the order of magnitude of optical wavelength, is the special optical material with photon frequency forbidden band.Photonic crystal fiber, compared to traditional fiber, has endless single mode transmission, adjustable dispersion, high birefringence, can carry out the characteristics such as Polarization Control.According to guide-lighting principle, photonic crystal fiber can be divided into index-guiding PCF and Photonic Bandgap-photonic Crystal Fibers.Index-guiding PCF and traditional total internal reflection optical fiber light-guiding mechanism similar, the effective refractive index of its fibre core, higher than the effective refractive index of covering, meets total internal reflection light principle condition.Namely the photonic crystal fiber LMA-10 that this patent adopts is a kind of index-guiding PCF.
Mach-Zehnder interferometer brief introduction: optical fiber mach-Zehnder interferometer is a kind of functional Fibre-Optic Sensors, is commonly used for the modulator-demodular unit of phase place, frequency etc. in optical fiber technology.Mach-Zehnder optical fiber sensor in general meaning is made up of light source, beam splitter, two optical fiber, coupling mechanism, detectors, and wherein two optical fiber are respectively as reference path and modulation light path.The light transmitted in two light paths converges in coupling mechanism, interferes due to the existence of optical path difference, and the display of its interference spectrum on the detector.When carrying out the modulation of the physical quantitys such as temperature to modulation light path, the light path of the light of modulation optic path will change, and cause original optical path difference to change, interference spectrum also changes.By the relation that the change analyzing spectrum is corresponding with physical quantity variation, the sensitivity of this sensor can be obtained.Along with scientific-technical progress, optical fiber mach-Zehnder interferometer after improvement does not need with two optical fiber as reference light path and modulation light path, by the structure welding of some structures, make an optical fiber just can realize the interference of two parts light, now optical fiber is not only the Transmission Fibers as transmission light, more can use as sensor.
Based on a temperature sensor for the photonic crystal fiber Mach-Zehnder interferometer of corrosion treatment, its sensing head is made by the photonic crystal fiber through excessive erosion, and sensing head forms this Fibre Optical Sensor together with Transmission Fibers, wideband light source, spectrometer.
Summary of the invention
The object of this invention is to provide a kind of technical scheme of temperature sensor of the photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment.
The temperature sensor of described a kind of photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment, is characterized in that being made up of wideband light source (1), Transmission Fibers (2), sensing head (3), temperature-controlled cabinet (4), Transmission Fibers (5), spectrometer (6); Photonic crystal fiber through excessive erosion forms sensing head (3), one end of sensing head (3) is connected with wideband light source (1) by Transmission Fibers (2), and the other end is connected with spectrometer (6) by Transmission Fibers (5).
The temperature sensor of described a kind of photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment, is characterized in that the photonic crystal fiber model that need use when making sensing head (3) is LMA-10.
The temperature sensor of described a kind of photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment, is characterized in that described sensing head (3) length is 100 μm.
The temperature sensor of described a kind of photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment, it is characterized in that G.652 the single-mode fiber that Transmission Fibers (2) and Transmission Fibers (5) use can adopt, G.653 and G.655 single-mode fiber, welding is respectively 20 ~ 30cm in the Transmission Fibers (2) at sensing head (3) two ends and the length of Transmission Fibers (5).
The invention has the advantages that: this sensor construction is exquisite, can be used for the rugged surroundings such as high pressure, electrical noise, high temperature, corrosion.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Fig. 2 is the cross-sectional view of the undressed photonic crystal fiber that the present invention uses
Fig. 3 is the cross-sectional view of the photonic crystal fiber of the present invention after corrosion treatment
Fig. 4 is the regional correlation figure before and after photonic crystal fiber corrosion
Fig. 5 is the welding interface schematic diagram of sensing head and Transmission Fibers
Embodiment
Below in conjunction with Figure of description, the present invention is further described:
As shown in Figure 1, a kind of temperature sensor of the photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment comprises wideband light source (1), Transmission Fibers (2), sensing head (3), temperature-controlled cabinet (4), Transmission Fibers (5) and spectrometer (6).Being produced as follows of sensing head (3): one end of one section of photonic crystal fiber and Transmission Fibers (2) not to be caved in welding with heat sealing machine, then the other end of photonic crystal fiber is dipped vertically into HF acid solution corrodes.Due to capillary effect, corrosive solution enters in the airport of photonic crystal fiber.Through 180 seconds, each circular air hole wall of photonic crystal fiber periodic arrangement disappeared through excessive erosion, and the hexagonal area that photonic crystal fiber is arranged by circular airport originally corrodes into hexagonal air hole.And due to corrosion, the solid section that airport surrounds attenuates, and forms the thin core segment that a diameter is about 2 μm.As shown in Figure 2, wherein white circular aperture is airport to photonic crystal fiber end face before corrosion, and grey parts is quartz material.As shown in Figure 3, grey parts is quartz material to photonic crystal fiber after corrosion, and hexagonal white portion is the airport formed after corrosion, and the solid section that the airport that center is periodically arranged surrounds attenuates after corrosion.Corrosion front and rear side circle comparison diagram as shown in Figure 4, as can be seen from Figure 4, after corrosion, it is slightly bigger that the scope in hexagonal air chamber arranges than uncorroded circular airport the hexagonal area formed, thin core segment than uncorroded circular airport around middle body slightly a little bit smaller.The other end of this treated photonic crystal fiber and Transmission Fibers (5) are carried out nothing with heat sealing machine to cave in welding, this photonic crystal fiber through corrosion treatment forms sensing head (3).Transmission Fibers (2) connects wideband light source (1), and Transmission Fibers (5) connects spectrometer (6).
The working method of apparatus of the present invention is: as shown in Figure 5, Transmission Fibers is single-mode fiber to the welding interface of sensing head and Transmission Fibers, and light is mainly propagated in fibre core, and core diameter is about 8 μm.The light that wideband light source sends enters sensing head by Transmission Fibers, and at the interface place of sensing head and Transmission Fibers welding, light can not mate with the thin core size in the middle of sensing head due to Transmission Fibers fibre core, causes a part of light to enter the airport of photonic crystal fiber.Light respectively along thin core and air chamber transmission, and jointly enters the fibre core of Transmission Fibers in sensing head at the interface of next sensing head and Transmission Fibers welding, and interferes owing to there being stable optical path difference.The light of interfering imports spectrometer into via Transmission Fibers, and spectrometer demonstrates interference spectrum.When ambient temperature changes, because thin core is different with the responsiveness of air chamber to temperature variation, cause the optical path difference of the light transmitted along thin core and air chamber to change, spectrometer demonstrates the drift of interference spectrum.The drift value of spectrum is relevant with temperature variation, so the change of monitoring interference spectrum just can calculate the temperature control of this sensor further.
Claims (4)
1., based on a temperature sensor for the photonic crystal fiber Mach-Zehnder interferometer of corrosion treatment, it is characterized in that being made up of wideband light source (1), Transmission Fibers (2), sensing head (3), temperature-controlled cabinet (4), Transmission Fibers (5), spectrometer (6); Photonic crystal fiber through excessive erosion forms sensing head (3), one end of sensing head (3) is connected with wideband light source (1) by Transmission Fibers (2), and the other end is connected with spectrometer (6) by Transmission Fibers (5).
2. the temperature sensor of a kind of photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment according to claim 1, is characterized in that the photonic crystal fiber model that need use when making sensing head (3) is LMA-10.
3. the temperature sensor of a kind of photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment according to claim 1, is characterized in that described sensing head (3) length is 100 μm.
4. the temperature sensor of the photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment according to claim 1, it is characterized in that G.652 the single-mode fiber that Transmission Fibers (2) and Transmission Fibers (5) use can adopt, G.653 and G.655 single-mode fiber, welding is respectively 20 ~ 30cm in the Transmission Fibers (2) at sensing head (3) two ends and the length of Transmission Fibers (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520276291.7U CN204924487U (en) | 2015-04-30 | 2015-04-30 | Photonic crystal optic fibre mach - once is temperature sensor of interferometer morally based on corrosion treatment |
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| CN201520276291.7U CN204924487U (en) | 2015-04-30 | 2015-04-30 | Photonic crystal optic fibre mach - once is temperature sensor of interferometer morally based on corrosion treatment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181170A (en) * | 2015-04-30 | 2015-12-23 | 中国计量学院 | Mach-Zehnder interferometer temperature sensor based on corroded photonic crystal fibers |
| CN106959172A (en) * | 2017-03-23 | 2017-07-18 | 重庆大学 | Compact M Z interference temperature sensor of high sensitivity and preparation method thereof |
| CN110514233A (en) * | 2019-10-10 | 2019-11-29 | 中国计量大学 | Mach-Zehnder interferometer on a kind of cavity suspension channel-style optical fiber cable |
-
2015
- 2015-04-30 CN CN201520276291.7U patent/CN204924487U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181170A (en) * | 2015-04-30 | 2015-12-23 | 中国计量学院 | Mach-Zehnder interferometer temperature sensor based on corroded photonic crystal fibers |
| CN105181170B (en) * | 2015-04-30 | 2018-10-26 | 中国计量学院 | A kind of temperature sensor of the photonic crystal fiber Mach-Zehnder interferometer based on corrosion treatment |
| CN106959172A (en) * | 2017-03-23 | 2017-07-18 | 重庆大学 | Compact M Z interference temperature sensor of high sensitivity and preparation method thereof |
| CN106959172B (en) * | 2017-03-23 | 2019-09-24 | 重庆大学 | Highly sensitive compact M-Z interference temperature sensor and preparation method thereof |
| CN110514233A (en) * | 2019-10-10 | 2019-11-29 | 中国计量大学 | Mach-Zehnder interferometer on a kind of cavity suspension channel-style optical fiber cable |
| CN110514233B (en) * | 2019-10-10 | 2024-04-26 | 中国计量大学 | Mach-Zehnder interferometer on cavity suspension channel type optical fiber line |
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Granted publication date: 20151230 Termination date: 20160430 |