CN109507132A - Spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures - Google Patents
Spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures Download PDFInfo
- Publication number
- CN109507132A CN109507132A CN201910043943.5A CN201910043943A CN109507132A CN 109507132 A CN109507132 A CN 109507132A CN 201910043943 A CN201910043943 A CN 201910043943A CN 109507132 A CN109507132 A CN 109507132A
- Authority
- CN
- China
- Prior art keywords
- interferometer
- circulator
- coupler
- optical fiber
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
- G01N2021/458—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods using interferential sensor, e.g. sensor fibre, possibly on optical waveguide
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Based on the spectrographic detection type gas sensor of double optical fiber FP interferometer parallel-connection structures, belong to gas concentration measurement technical field.It is to be hoisted that the present invention solves the problems, such as that the sensitivity of existing fiber gas sensor has.Innovative point: including FP interferometer I and FP interferometer II；Wide spectrum light source, isolator I and coupler I are sequentially connected, and pump laser, isolator II and FP interferometer I are sequentially connected；Coupler II, filter, spectrometer are sequentially connected；Circulator I and circulator II is arranged in parallel in the optical path between coupler I and coupler II, and circulator I is connect with FP interferometer I, and circulator II is connect with FP interferometer II.The present invention is in parallel by two FP interferometers, so that it is generated cursor effect, gasmetry sensitivity is improved using the sensitizing property of cursor effect, and tested gasmetry sensitivity is made to improve the 1-2 order of magnitude.
Description
Technical field
The present invention relates to a kind of gas sensors, and in particular to a kind of spectrum based on double optical fiber FP interferometer parallel-connection structures
Detecting gas sensor belongs to gas concentration measurement technical field.
Background technique
Measurement for gas concentration generallys use spatial spectral absorption process and measures, in order to improve sensitivity needs
Large volume gas chamber causes equipment instrument huge, it is difficult to realize on-line checking.
Optical fiber gas sensing technology belongs to up-and-coming youngster in gas detection technology, just comes into people in the 1970s
The visual field.Fiber gas sensor transmission power loss is small, is suitble to long range measurements, has under the adverse circumstances such as high temperature, high pressure
Stronger advantage, structure is simple, high sensitivity, reliable and stable.Numerous research works have been obtained in view of above various unique advantages
The favor of person, status in practical applications are also gradually promoted, but the sensitivity of existing fiber gas sensor need to be mentioned
It rises.
Summary of the invention
It has been given below about brief overview of the invention, in order to provide about the basic of certain aspects of the invention
Understand.It should be appreciated that this summary is not an exhaustive overview of the invention.It is not intended to determine pass of the invention
Key or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain concepts in simplified form,
Taking this as a prelude to a more detailed description discussed later.
In consideration of it, the present invention is for be hoisted, the Jin Erti that solves the problems, such as that the sensitivity of existing fiber gas sensor has
For a kind of spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures.Double FP interferometers are in parallel, make it
Cursor effect is generated, gasmetry sensitivity is improved using the sensitizing property of cursor effect.Compared with single FP interferometer,
Double FP interferometer parallel-connection structures can make tested gasmetry sensitivity improve the 1-2 order of magnitude.
Scheme: the spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures, including wide spectrum light source, every
From device I, coupler I, coupler II, pump laser, isolator II, circulator I, circulator II, filter, spectrometer, FP
Interferometer I and FP interferometer II；
The wide spectrum light source, isolator I and coupler I are sequentially connected, the pump laser, isolator II and FP interference
Meter I is sequentially connected；The coupler II, filter, spectrometer are sequentially connected；Circulator I and circulator II are arranged in parallel in coupling
In optical path between clutch I and coupler II, circulator I is connect with FP interferometer I, and circulator II is connect with FP interferometer II；
Detect the optical path of light are as follows: detection light is issued by wide spectrum light source, by isolator I, is divided into two into coupler I
Shu Guang；Light beam enters FP interferometer I through circulator I, then enters coupler II through circulator, another light beam through circulator II into
Enter FP interferometer II, then enter coupler II through circulator II, two-beam sequentially enters filter after coupler II synthesizes light beam
Wave device and spectrometer；
The optical path of pump light are as follows: pump light is issued by pump laser, successively enters FP interference by isolator II
Count I.
Further: hollow-core photonic crystal fiber (HC-PCF) both ends and single mode optical fiber of the length in 5-20 millimeters of ranges
Welding forms FP interferometer I, and the diameter of hollow-core photonic crystal fiber identical as single mode optical fiber is 125 microns.
Further: the fibre core of the hollow-core photonic crystal fiber is air, and core diameter is 10-30 microns；Hollow light
There are multiple apertures in the side of photonic crystal fiber, guarantees that its fibre core communicates with the outside world, and the diameter of aperture is 5-20 microns, aperture it is close
Degree is 4-20/centimetres.
Further: hollow-core photonic crystal fiber (HC-PCF) both ends and single mode optical fiber of the length in 5-20 millimeters of ranges
Welding forms FP interferometer II, and the diameter of hollow-core photonic crystal fiber identical as single mode optical fiber is 125 microns；Air-core photonic is brilliant
The fibre core of body optical fiber is air, and core diameter is 10-30 microns.
Further: the pump laser is narrowband Distributed Feedback Laser, the suction of the wavelength of pump laser and tested gas
It receives peak to be overlapped, guarantees that tested gas has strong absorption to pump light, wide spectrum light source is as detecting laser, due to its energy spectrum
Density be much smaller than pump light, therefore detect light it is absorbed it is negligible；When pump light enters in FP interferometer I, hollow light
Tested gas temperature raising due to absorbing pump light in photonic crystal fiber, causes hollow-core photonic crystal fiber due to temperature increases
Length variation occurs.
Present invention effect achieved are as follows:
The present invention is in parallel by double FP interferometers, so that it is generated cursor effect, is improved using the sensitizing property of cursor effect
Gasmetry sensitivity.Compared with single FP interferometer, double FP interferometer parallel-connection structures can make tested gasmetry sensitive
Degree improves the 1-2 order of magnitude, which has high anti-interference ability to extraneous vibration.
Detailed description of the invention
Fig. 1 is that the present invention is based on the spectrographic detection type gas sensor configuration figures of double optical fiber FP interferometer parallel-connection structures；
Fig. 2 is the structure chart of FP interferometer I；
Fig. 3 is the interference spectrogram of FP interferometer I；
Fig. 4 is the structure chart of FP interferometer II；
Fig. 5 is the interference spectrogram of FP interferometer II；
Fig. 6 is interference spectrum envelope diagram.
Specific embodiment
For clarity and conciseness, all features of actual implementation mode are not described in the description.However, should
Understand, much decisions specific to embodiment must be made, during developing any this practical embodiments so as to reality
The objectives of existing developer, for example, meeting restrictive condition those of related to system and business, and these restrictive conditions
It may be changed with the difference of embodiment.In addition, it will also be appreciated that although development is likely to be very multiple
It is miscellaneous and time-consuming, but for the those skilled in the art for having benefited from the disclosure of invention, this development is only example
Capable task.
Here, also it should be noted is that, in order to avoid having obscured the present invention because of unnecessary details, applying for text
Illustrate only in part with closely related apparatus structure and/or processing step according to the solution of the present invention, and be omitted and this
The little other details of inventive relationship.
Embodiment 1: referring to Fig. 1 to Fig. 6, the spectrographic detection based on double optical fiber FP interferometer parallel-connection structures of present embodiment
Type gas sensor,
Including wide spectrum light source, isolator I, coupler I, coupler II, pump laser, isolator II, circulator I, ring
Shape device II, filter, spectrometer, FP interferometer I and FP interferometer II；
The wide spectrum light source, isolator I and coupler I are sequentially connected, the pump laser, isolator II and FP interference
Meter I is sequentially connected；The coupler II, filter, spectrometer are sequentially connected；Circulator I and circulator II are arranged in parallel in coupling
In optical path between clutch I and coupler II, circulator I is connect with FP interferometer I, and circulator II is connect with FP interferometer II.
Wherein, FP interferometer I.
Hollow-core photonic crystal fiber (HC-PCF) both ends of the length in 5-20 millimeters of ranges are formed with single mode optical fiber welding
FP interferometer I, as shown in Figure 2.The diameter of HC-PCF identical as single mode optical fiber is 125 microns, and the fibre core of HC-PCF is air,
Core diameter is 10-30 microns, and there are multiple apertures in the side of HC-PCF, guarantees that its fibre core is come round with the external world, the diameter of aperture is equal
It is 5-20 microns, the density of aperture is 4-20/centimetres.
After the detection light that wide spectrum light source issues enters FP interferometer I by circulator I, light is detected successively successively through reflecting surface
I and reflecting surface II reflection, two beam reflected lights form interference, light intensity I after interferenceFP1It can indicate are as follows:
Wherein I11And I12Respectively light intensity of the detection light after reflecting surface I and reflecting surface II reflection, L1For hollow-core fiber
Length, λ are the wavelength for detecting light.Interference spectrum is as shown in Figure 3.
The interference spectrum trough of FP interferometer I meets:
Wherein, m1For integer, λm1For the corresponding wavelength of interference spectrum trough.
The Free Spectral Range FSR of the interference spectrum of FP interferometer I can be obtained by (2) formulaFP1Are as follows:
By (2) formula to L1Differential obtains the relationship between the interference spectrum translational movement and FP1 cavity length of FP interferometer I are as follows:
Wherein, Δ λFP1For the translational movement of FP interferometer I interference spectrum, Δ L1For the length variable quantity of HC-PCF optical fiber.
Photothermal spectroscopy technology.
Pump laser is narrowband Distributed Feedback Laser, and the wavelength of pump laser is overlapped with the absorption peak of tested gas, is guaranteed
Tested gas has strong absorption to pump light.Detecting laser is wide spectrum light source, since its energy spectral density is much smaller than pumping
Light, thus detect light it is absorbed it is negligible.When pump light enters in FP interferometer I, the tested gas in HC-PCF optical fiber
Body temperature due to absorbing pump light increases, and HC-PCF optical fiber temperature is caused to increase and length variation.HC-PCF fiber lengths
Variable quantity may be expressed as:
ΔL1=α P Δ C (5)
Wherein, P is pump laser power, Δ L1For the variable quantity of the double refractive inde of polarization HC-PCF optical fiber, Δ C is
The variable quantity of tested gas concentration, α is preset constant, can be set based on experience value.
(5) formula substitution (4) formula is obtained into the translational movement of FP interferometer I interference spectrum with the variation relation of tested gas concentration:
Wherein, FP interferometer II.
HC-PCF optical fiber both ends of the length in 5-20 millimeters of ranges and single mode optical fiber welding form FP interferometer II, such as scheme
Shown in 4.The diameter of hollow identical as single mode optical fiber is 125 microns, and the fibre core of hollow-core fiber is air, and core diameter is
10-30 microns.
After detection light enters FP interferometer II by circulator, light is detected successively successively through reflecting surface III and reflecting surface IV
Reflection, two beam reflected lights form interference, light intensity I after interferenceFP2It can indicate are as follows:
Wherein I21And I22Respectively light intensity of the detection light after reflecting surface III and reflecting surface IV reflection, L2For hollow-core fiber
Length, λ be detect light wavelength.Interference spectrum is as shown in Figure 5.
The interference spectrum trough of FP interferometer II meets:
Wherein, m2For integer, λm2For the corresponding wavelength of interference spectrum trough.
The Free Spectral Range FSR of the interference spectrum of FP interferometer II can be obtained by (8) formulaFP2Are as follows:
Cursor effect principle:
Coupler I, coupler II splitting ratio be 50:50.Filter effect: the pumping of pump laser sending is filtered
Light prevents it from being received by spectrometer.Isolator I shields to wide spectrum light source, prevent to detect light and pump light from into
Enter wide spectrum light source；Isolator II shields to pump light source, makes to detect light and pump light not can enter pump light source.
When the Free Spectral Range of FP interferometer I and FP interferometer II is close, the detection light that wide spectrum light source issues is through dividing
Cursor effect will be generated when meeting again after other FP interferometer I and FP interferometer II, the interference spectrum of FP interferometer I is dry by FP
The modulation of meter II is related to, modulated interference spectrum will generate interference spectrum envelope as shown in Figure 6.Interfere the free spectrum model of spectrum envelope
Enclose FSREnvelopeWith FP interferometer I Free Spectral Range FSRFP1With FP interferometer I Free Spectral Range FSRFP2Relationship are as follows:
FSREnvelope=MFSRFP1 (10)
Due to being tested the variation of gas concentration, as the interference spectrum translation Δ λ of FP interferometer IFP1When, interfere the flat of spectrum envelope
Shifting amount Δ λEnvelopeAre as follows:
ΔλEnvelope=M Δ λFP1 (12)
(6) formula substitution (12) formula is obtained:
Above formula shows: when the interference spectrum of FP interferometer I changes when frequency displacement with tested gas concentration, interference spectrum envelope is therewith
Frequency displacement, and frequency shift amount is M times of the interference spectrum frequency shift amount of FP interferometer I, therefore, M is referred to as sensitivity enhancement factor.By formula
(11) desired M value is obtained by setting the Free Spectral Range of FP interferometer I and FP interferometer II known to, under normal conditions M
Range be 5-50.
Spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures in embodiment has the advantages that
1) relative to single FP interferometer gas sensor, based on the gas sensor of double FP interferometer parallel-connection structures,
Measurement sensitivity improves the 1-2 order of magnitude.
2) structure has high anti-interference ability to extraneous vibration.
Although disclosed embodiment is as above, its content is only to facilitate understand technical side of the invention
Case and the embodiment used, are not intended to limit the present invention.Any those skilled in the art to which this invention pertains, not
Under the premise of being detached from disclosed core technology scheme, any modification and change can be made in form and details in implementation
Change, but protection scope defined by the present invention, the range that the appended claims that must still be subject to limits.
Claims (5)
1. the spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures, it is characterised in that: including wide spectrum optical
Source, isolator I, coupler I, coupler II, pump laser, isolator II, circulator I, circulator II, filter, spectrum
Instrument, FP interferometer I and FP interferometer II；
The wide spectrum light source, isolator I and coupler I are sequentially connected, the pump laser, isolator II and FP interferometer I
It is sequentially connected；The coupler II, filter, spectrometer are sequentially connected；Circulator I and circulator II are arranged in parallel in coupler
In optical path between I and coupler II, circulator I is connect with FP interferometer I, and circulator II is connect with FP interferometer II；
Detect the optical path of light are as follows: detection light is issued by wide spectrum light source, by isolator I, is divided into two beams into coupler I
Light；Light beam enters FP interferometer I through circulator I, then enters coupler II through circulator, and another light beam enters through circulator II
FP interferometer II, then enter coupler II through circulator II, two-beam sequentially enters filtering after coupler II synthesizes light beam
Device and spectrometer；
The optical path of pump light are as follows: pump light is issued by pump laser, successively enters FP interferometer I by isolator II.
2. the spectrographic detection type gas sensor according to claim 1 based on double optical fiber FP interferometer parallel-connection structures,
Be characterized in that: hollow-core photonic crystal fiber both ends of the length in 5-20 millimeters of ranges and single mode optical fiber welding form FP interferometer
I, the diameter of hollow-core photonic crystal fiber identical as single mode optical fiber is 125 microns.
3. the spectrographic detection type gas sensor according to claim 2 based on double optical fiber FP interferometer parallel-connection structures,
Be characterized in that: the fibre core of the hollow-core photonic crystal fiber is air, and core diameter is 10-30 microns；Hollow photon crystal light
There are multiple apertures in fine side, guarantees that its fibre core communicates with the outside world, and the diameter of aperture is 5-20 microns, and the density of aperture is 4-20
A/centimetre.
4. the spectrographic detection type gas sensor according to claim 3 based on double optical fiber FP interferometer parallel-connection structures,
Be characterized in that: hollow-core photonic crystal fiber both ends of the length in 5-20 millimeters of ranges and single mode optical fiber welding form FP interferometer
II, the diameter of hollow-core photonic crystal fiber identical as single mode optical fiber is 125 microns；The fibre core of hollow-core photonic crystal fiber is sky
Gas, core diameter are 10-30 microns.
5. the spectrographic detection type gas sensor according to claim 4 based on double optical fiber FP interferometer parallel-connection structures,
Be characterized in that: the pump laser is narrowband Distributed Feedback Laser, the absorption peak weight of the wavelength of pump laser and tested gas
It closes, wide spectrum light source is as detecting laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910043943.5A CN109507132A (en) | 2019-01-17 | 2019-01-17 | Spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910043943.5A CN109507132A (en) | 2019-01-17 | 2019-01-17 | Spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109507132A true CN109507132A (en) | 2019-03-22 |
Family
ID=65758061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910043943.5A Pending CN109507132A (en) | 2019-01-17 | 2019-01-17 | Spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109507132A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030547A (en) * | 2021-03-04 | 2021-06-25 | 哈尔滨工业大学 | Vernier effect based orthogonal arm type MZ interferometer optical fiber current sensor |
| CN114235729A (en) * | 2021-12-17 | 2022-03-25 | 吉林大学 | Heavy metal ion detection device based on parallel Fabry-Perot interferometer |
| US11821801B1 (en) * | 2019-01-18 | 2023-11-21 | Stable Laser Systems, Inc. | Implementation of a dual Fabry-Perot photonic pressure sensor |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387608A (en) * | 2008-05-27 | 2009-03-18 | 重庆大学 | Ultralong Fabry-Parot interferent gas sensor and gas tester based on the sensor |
| CN101604055A (en) * | 2008-12-12 | 2009-12-16 | 北京理工大学 | A kind of parallel double-chamber tunable fiber fabry-perot filter |
| CN203287306U (en) * | 2013-05-08 | 2013-11-13 | 安徽理工大学 | Gas detecting system based on EFPI sensor of hollow PCF |
| CN205691490U (en) * | 2016-06-21 | 2016-11-16 | 中国计量大学 | A kind of cascade connection type FPI hydrogen gas sensor based on cursor effect |
| CN106248602A (en) * | 2016-09-19 | 2016-12-21 | 电子科技大学 | Hydrogen sulfide gas sensing device based on optical fiber F P interferometer |
| CN106908389A (en) * | 2017-03-17 | 2017-06-30 | 哈尔滨翰奥科技有限公司 | Gas sensor and the method for detecting hydrogen fluoride gas change in concentration |
| CN107796530A (en) * | 2017-10-20 | 2018-03-13 | 黑龙江工程学院 | A kind of spectrographic detection temperature sensor in parallel with FP chambers based on Sagnac rings |
| CN107817062A (en) * | 2017-10-20 | 2018-03-20 | 黑龙江工程学院 | A kind of oscillograph detection temperature sensor in parallel with FP chambers based on Sagnac rings |
| CN107990996A (en) * | 2017-11-03 | 2018-05-04 | 黑龙江工程学院 | A kind of temperature sensor based on interference spectrum cursor effect and annular Research on Cavity Ring Down Spectroscopy |
| CN207623230U (en) * | 2017-12-07 | 2018-07-17 | 哈尔滨理工大学 | The gas sensor interfered based on photothermal spectroscopy technology and Sagnac |
| CN108801946A (en) * | 2017-04-27 | 2018-11-13 | 香港理工大学深圳研究院 | Fabry-Perot cavity fibre optical sensor and its manufacture and gas detection method |
-
2019
- 2019-01-17 CN CN201910043943.5A patent/CN109507132A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387608A (en) * | 2008-05-27 | 2009-03-18 | 重庆大学 | Ultralong Fabry-Parot interferent gas sensor and gas tester based on the sensor |
| CN101604055A (en) * | 2008-12-12 | 2009-12-16 | 北京理工大学 | A kind of parallel double-chamber tunable fiber fabry-perot filter |
| CN203287306U (en) * | 2013-05-08 | 2013-11-13 | 安徽理工大学 | Gas detecting system based on EFPI sensor of hollow PCF |
| CN205691490U (en) * | 2016-06-21 | 2016-11-16 | 中国计量大学 | A kind of cascade connection type FPI hydrogen gas sensor based on cursor effect |
| CN106248602A (en) * | 2016-09-19 | 2016-12-21 | 电子科技大学 | Hydrogen sulfide gas sensing device based on optical fiber F P interferometer |
| CN106908389A (en) * | 2017-03-17 | 2017-06-30 | 哈尔滨翰奥科技有限公司 | Gas sensor and the method for detecting hydrogen fluoride gas change in concentration |
| CN108801946A (en) * | 2017-04-27 | 2018-11-13 | 香港理工大学深圳研究院 | Fabry-Perot cavity fibre optical sensor and its manufacture and gas detection method |
| CN107796530A (en) * | 2017-10-20 | 2018-03-13 | 黑龙江工程学院 | A kind of spectrographic detection temperature sensor in parallel with FP chambers based on Sagnac rings |
| CN107817062A (en) * | 2017-10-20 | 2018-03-20 | 黑龙江工程学院 | A kind of oscillograph detection temperature sensor in parallel with FP chambers based on Sagnac rings |
| CN107990996A (en) * | 2017-11-03 | 2018-05-04 | 黑龙江工程学院 | A kind of temperature sensor based on interference spectrum cursor effect and annular Research on Cavity Ring Down Spectroscopy |
| CN207623230U (en) * | 2017-12-07 | 2018-07-17 | 哈尔滨理工大学 | The gas sensor interfered based on photothermal spectroscopy technology and Sagnac |
Non-Patent Citations (2)
| Title |
|---|
| YANG OUYANG ET AL: "Temperature Compensated Refractometer Based on Parallel Fiber Fabry–Pérot Interferometers", 《IEEE》 * |
| 章鹏 等: "光纤法布里-珀罗传感器的并联复用研究", 《中国光学学会2004年学术大会》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11821801B1 (en) * | 2019-01-18 | 2023-11-21 | Stable Laser Systems, Inc. | Implementation of a dual Fabry-Perot photonic pressure sensor |
| CN113030547A (en) * | 2021-03-04 | 2021-06-25 | 哈尔滨工业大学 | Vernier effect based orthogonal arm type MZ interferometer optical fiber current sensor |
| CN114235729A (en) * | 2021-12-17 | 2022-03-25 | 吉林大学 | Heavy metal ion detection device based on parallel Fabry-Perot interferometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109490235A (en) | Spectrographic detection type gas sensor based on optical fiber Sagnac ring and optical fiber FP chamber cascade enhanced sensitivity | |
| CN109490234A (en) | Spectrographic detection type gas sensor based on the bicyclic parallel-connection structure of optical fiber Sagnac | |
| CN206618529U (en) | A kind of simple reflective interference-type optical fiber baroceptor | |
| CN107817221A (en) | The gas sensor interfered based on photothermal spectroscopy technology and Sagnac | |
| CN109507132A (en) | Spectrographic detection type gas sensor based on double optical fiber FP interferometer parallel-connection structures | |
| CN105181112B (en) | A kind of low fineness Fabry Perot optical fibre sound pressure sensor of diaphragm type based on Fiber Bragg Grating FBG | |
| CN207623230U (en) | The gas sensor interfered based on photothermal spectroscopy technology and Sagnac | |
| CN102778306A (en) | Refractive index and temperature sensor of photonic crystal fiber, manufacturing method and measuring system | |
| CN106556574B (en) | Online two-beam interference type optic fibre refractive index sensor and refractivity tester | |
| CN109507128A (en) | Strength investigation type gas sensor based on FP interferometer parallel-connection structure and photothermal technique | |
| CN109490233A (en) | The strength investigation type gas sensor of enhanced sensitivity and photothermal technique is cascaded based on FP interferometer | |
| CN110595515B (en) | Double-parameter optical fiber sensor based on polarization maintaining optical fiber and FP (Fabry-Perot) cavity | |
| CN107101951A (en) | It is a kind of to be used for the fibre optical sensor of density of hydrogen and temperature simultaneously measuring | |
| CN101303300A (en) | Minitype optical fiber F-P sensor, manufacturing method and liquid tester based on sensor | |
| Chen et al. | Novel compact and low-cost ultraweak Fabry–Perot interferometer as a highly sensitive refractive index sensor | |
| CN110260920A (en) | Temperature and refractive index dual sampling device based on directional coupler and long-period fiber grating | |
| CN110927113A (en) | Fiber integrated hydrogen sensor and manufacturing method thereof | |
| Guo et al. | High sensitivity gas pressure sensor based on two parallel-connected Fabry–Perot interferometers and Vernier effect | |
| CN110320181A (en) | A kind of optical fibre Michelson interferometric sensor and the method for sensing based on the sensor | |
| CN109507129A (en) | Spectrographic detection type gas sensor based on FP two-chamber cascade sensitizing property | |
| CN204177736U (en) | The trace gas detection device in chamber is swung based on two-way light decay | |
| CN109781637A (en) | Gas sensor based on optical fiber double cavity structure enhanced sensitivity and photothermal technique | |
| CN109580037A (en) | Temperature sensor and preparation method thereof based on photonic crystal fiber FP structure | |
| CN105806511B (en) | The micro optical fiber microminiature temperature sensor of cascaded structure is bored based on ball | |
| CN109507134A (en) | Spectrographic detection type gas sensor based on atmospheric chamber Sagnac interferometer Yu FP interferometer parallel-connection structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190322 |