CN110196071A - Based on Fabry Perot chamber side throwing fibre optical sensor and preparation method thereof - Google Patents
Based on Fabry Perot chamber side throwing fibre optical sensor and preparation method thereof Download PDFInfo
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- CN110196071A CN110196071A CN201910545316.1A CN201910545316A CN110196071A CN 110196071 A CN110196071 A CN 110196071A CN 201910545316 A CN201910545316 A CN 201910545316A CN 110196071 A CN110196071 A CN 110196071A
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- 239000013307 optical fiber Substances 0.000 claims abstract description 57
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35312—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Fabry Perot
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
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Abstract
The present invention provides one kind based on Fabry Perot chamber side throwing fibre optical sensor and preparation method thereof, and the sensor includes sequentially connected wideband light source, input transmission fiber, circulator, output transmission fiber and spectroanalysis instrument；The circulator is sequentially connected Fabry Perot chamber and End optical fibers by fiber bragg grating, and the middle section of the fiber bragg grating forms rubbing down face by side throwing.The input transmission fiber, the output transmission fiber and the fiber bragg grating are single mode optical fiber；The End optical fibers are single mode optical fiber or multimode fibre.Fibre optical sensor provided by the invention, the sensor made is put into sample to be tested pond, sample to be tested and sensor sheet face contact, when fibre optical sensor ambient refractive index or temperature change, the measurement to sample to be tested refractive index or temperature change can be realized by detecting interference spectral changes, which has the advantages that structure is simple, quick, high sensitivity.
Description
Technical field
The present invention relates to technical field of optical fiber sensing, more particularly to one kind to be based on Fabry Perot chamber side throwing fibre optical sensor
And preparation method thereof.
Background technique
In in the past few decades, with the rapid development of fiber optic communication and photoelectric technology, optical fiber sensing technology is also obtained
Than more comprehensively development.Fibre optical sensor is small in size with its, light-weight, electromagnetism interference, corrosion-resistant, high sensitivity, bendable
Song distortion and carry out point type and the advantages that distributed measurement and in architectural engineering, power industry, space flight navigation, medicine and chemistry
Equal fields are widely used.
Colonial has investigated the optical fiber sensing systems such as fibre optic gyroscope, underwater sound device, magnetometer and supervises for nuclear radiation
The fibre optical sensor of survey, many countries such as Japan, Britain, France and Germany have also played an active part in the research of fibre optical sensor one after another
In competition.Currently, fibre optical sensor is from military affairs to being all widely used on civilian.
Summary of the invention
It is passed in order to solve the above technical problems, first aspect present invention provides one kind based on Fabry Perot chamber side throwing optical fiber
Sensor, the sensor include sequentially connected wideband light source, input transmission fiber, circulator, output transmission fiber and spectrum
Analyzer；The circulator is sequentially connected Fabry Perot chamber and End optical fibers by fiber bragg grating.
Wherein, the length L1 of the Fabry Perot chamber is 40-80 μm.
Preferably, the length L1 of the Fabry Perot chamber is 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm.
Wherein, the middle section of the fiber bragg grating forms rubbing down face by side throwing.
Wherein, the length L2 in the rubbing down face is 10-20mm.
Preferably, the length L2 in the rubbing down face be 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm,
19mm。
Wherein, the depth H 2 in the rubbing down face is 55-60 μm.
Preferably, the depth H 2 in the rubbing down face is 56 μm, 57 μm, 58 μm, 59 μm.
Wherein, the input transmission fiber, the output transmission fiber and the fiber bragg grating are single mode optical fiber.
Wherein, the End optical fibers are single mode optical fiber or multimode fibre.
Second aspect of the present invention provides a kind of preparation method based on Fabry Perot chamber side throwing fibre optical sensor, including
Following steps:
S1, will be led to after the middle section progress side throwing of a fiber bragg grating with another optical fiber using wheeled side throwing device
It crosses ultraviolet glue to be attached, forms Fabry Perot chamber in the place of ultraviolet glue connection；
S2, wideband light source, input transmission fiber, circulator, output transmission fiber and spectroanalysis instrument are sequentially connected, it is described to follow
Ring device is connect with the fiber bragg grating of the chamber containing Fabry Perot in step S1；Wideband light source is set to enter optical fiber by circulator
Bragg grating interferes in the intracavitary Fabry Perot that reflects to form of Fabry Perot, then by circulator, reaches spectrum point
Analyzer.
Wherein, the input transmission fiber, the output transmission fiber and the fiber bragg grating are single mode optical fiber.
Wherein, the length L1 of the Fabry Perot chamber is 40-80 μm.
Preferably, the length L1 of the Fabry Perot chamber is 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm.
Beneficial effects of the present invention:
It is provided by the invention to be based on Fabry Perot chamber side throwing fibre optical sensor, including sequentially connected wideband light source, input biography
Lose fibre, circulator, output transmission fiber and spectroanalysis instrument；The circulator is sequentially connected method by fiber bragg grating
The middle section of Bripello chamber and End optical fibers, the fiber bragg grating forms rubbing down face by side throwing.The combination
The advantages of Fabry Perot (F-P) sensor, fiber bragg grating (FBG) sensor and side throwing optical fiber.
By constructing two fibre reflectors in two fiber end faces, two fiber end faces be aligned and separate it is a bit of away from
From, the reflected light from each reflector interferes with each other, F-P interference spectrum is generated, by measuring the offset of phase or wavelength spectrum,
The sensor parameter for being applied to F-P sensor can quantitatively be obtained；Using optics micro-processing technology in fiber bragg grating
Middle section carries out side throwing, the performance of outer fiber is leaked to by suddenly potential field using light in side throwing optical fiber, on its rubbing down face
Production optical texture deposits different thin-film materials and makes fibre optical sensor；And fiber Bragg grating sensor uses frequency
Rate is high, range is wide, can change the wavelength of the light wave of its reflection according to the variation of environment temperature or strain.
It is provided by the invention to be based on Fabry Perot chamber side throwing fibre optical sensor, the sensor made is put into test sample
In product pond, sample to be tested and sensor sheet face contact pass through inspection when fibre optical sensor ambient refractive index or temperature change
The measurement to sample to be tested refractive index or temperature change can be realized by surveying interference spectral changes, which has structure
Simply, quickly, high sensitivity the advantages of.
Detailed description of the invention
It, below will be simple to needing attached drawing to be used to make in embodiment in order to illustrate more clearly of technical solution of the present invention
Singly introduce, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, corresponds to the general of this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the overall structure diagram of fibre optical sensor provided by the invention；
Fig. 2 is the schematic diagram of internal structure of Fabry Perot chamber side throwing optical fiber in fibre optical sensor provided by the invention；
Title corresponding to appended drawing reference in attached drawing are as follows: 1- wideband light source, 2- input transmission fiber, 3- circulator, and 4- output passes
Lose fibre, 5- spectroanalysis instrument, 6- fiber bragg grating, 7- Fabry Perot chamber, 8- End optical fibers.
Specific embodiment
It is the preferred embodiment of the present invention below, it is noted that for those skilled in the art,
Various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as this hair
Bright protection scope.
Embodiment 1
The present invention provides one kind to be based on Fabry Perot chamber side throwing fibre optical sensor, and the sensor includes sequentially connected width
Band light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5；The circulator 3 passes through optical fiber
Bragg grating 6 is sequentially connected Fabry Perot chamber 7 and End optical fibers 8；The length L1 of the Fabry Perot chamber 7 is 40 μm,
The middle section of the fiber bragg grating 6 forms rubbing down face by side throwing, and the length L2 in the rubbing down face is 10mm, described
The depth H 2 in rubbing down face is 55 μm；The input transmission fiber 2, the output transmission fiber 4 and the fiber bragg grating 6
For single mode optical fiber, the End optical fibers 8 are single mode optical fiber.
It is provided in this embodiment to be prepared by the following method to obtain based on Fabry Perot chamber side throwing fibre optical sensor:
S1, the middle section of piece fiber bragg grating 6 is carried out after side throwing and another single mode using wheeled side throwing device
Optical fiber is attached by merciless board UV88 ultraviolet glue, forms Fabry Perot chamber 7 in the place of ultraviolet glue connection；
S2, wideband light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5 are sequentially connected,
The circulator 3 is connect with the fiber bragg grating 6 of chamber containing Fabry Perot 7 in step S1；Wideband light source 1 is set to pass through circulation
Device 3 enters fiber bragg grating 6, Fabry Perot interference is reflected to form in Fabry Perot chamber 7, then pass through circulation
Device 3 reaches spectroanalysis instrument 5.
Embodiment 2
The present invention provides one kind to be based on Fabry Perot chamber side throwing fibre optical sensor, and the sensor includes sequentially connected width
Band light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5；The circulator 3 passes through optical fiber
Bragg grating 6 is sequentially connected Fabry Perot chamber 7 and End optical fibers 8；The length L1 of the Fabry Perot chamber 7 is 60 μm,
The middle section of the fiber bragg grating 6 forms rubbing down face by side throwing, and the length L2 in the rubbing down face is 15mm, described
The depth H 2 in rubbing down face is 56 μm；The input transmission fiber 2, the output transmission fiber 4 and the fiber bragg grating 6
For single mode optical fiber, the End optical fibers 8 are multimode fibre.
It is provided in this embodiment to be prepared by the following method to obtain based on Fabry Perot chamber side throwing fibre optical sensor:
S1, the middle section of piece fiber bragg grating 6 is carried out after side throwing and another multimode using wheeled side throwing device
Optical fiber is attached by 9308 ultraviolet glue of Lantian board, forms Fabry Perot chamber 7 in the place of ultraviolet glue connection；
S2, wideband light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5 are sequentially connected,
The circulator 3 is connect with the fiber bragg grating 6 of chamber containing Fabry Perot 7 in step S1；Wideband light source 1 is set to pass through circulation
Device 3 enters fiber bragg grating 6, Fabry Perot interference is reflected to form in Fabry Perot chamber 7, then pass through circulation
Device 3 reaches spectroanalysis instrument 5.
Embodiment 3
The present invention provides one kind to be based on Fabry Perot chamber side throwing fibre optical sensor, and the sensor includes sequentially connected width
Band light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5；The circulator 3 passes through optical fiber
Bragg grating 6 is sequentially connected Fabry Perot chamber 7 and End optical fibers 8；The length L1 of the Fabry Perot chamber 7 is 50 μm,
The middle section of the fiber bragg grating 6 forms rubbing down face by side throwing, and the length L2 in the rubbing down face is 12mm, described
The depth H 2 in rubbing down face is 60 μm；The input transmission fiber 2, the output transmission fiber 4 and the fiber bragg grating 6
For single mode optical fiber, the End optical fibers 8 are single mode optical fiber.
It is provided in this embodiment to be prepared by the following method to obtain based on Fabry Perot chamber side throwing fibre optical sensor:
S1, the middle section of piece fiber bragg grating 6 is carried out after side throwing and another single mode using wheeled side throwing device
Optical fiber is attached by 9305 ultraviolet glue of Lantian board, forms Fabry Perot chamber 7 in the place of ultraviolet glue connection；
S2, wideband light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5 are sequentially connected,
The circulator 3 is connect with the fiber bragg grating 6 of chamber containing Fabry Perot 7 in step S1；Wideband light source 1 is set to pass through circulation
Device 3 enters fiber bragg grating 6, Fabry Perot interference is reflected to form in Fabry Perot chamber 7, then pass through circulation
Device 3 reaches spectroanalysis instrument 5.
Embodiment 4
The present invention provides one kind to be based on Fabry Perot chamber side throwing fibre optical sensor, and the sensor includes sequentially connected width
Band light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5；The circulator 3 passes through optical fiber
Bragg grating 6 is sequentially connected Fabry Perot chamber 7 and End optical fibers 8；The length L1 of the Fabry Perot chamber 7 is 70 μm,
The middle section of the fiber bragg grating 6 forms rubbing down face by side throwing, and the length L2 in the rubbing down face is 18mm, described
The depth H 2 in rubbing down face is 59 μm；The input transmission fiber 2, the output transmission fiber 4 and the fiber bragg grating 6
For single mode optical fiber, the End optical fibers 8 are multimode fibre.
It is provided in this embodiment to be prepared by the following method to obtain based on Fabry Perot chamber side throwing fibre optical sensor:
S1, the middle section of piece fiber bragg grating 6 is carried out after side throwing and another multimode using wheeled side throwing device
Optical fiber is attached by 9311 ultraviolet glue of Lantian board, forms Fabry Perot chamber 7 in the place of ultraviolet glue connection；
S2, wideband light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5 are sequentially connected,
The circulator 3 is connect with the fiber bragg grating 6 of chamber containing Fabry Perot 7 in step S1；Wideband light source 1 is set to pass through circulation
Device 3 enters fiber bragg grating 6, Fabry Perot interference is reflected to form in Fabry Perot chamber 7, then pass through circulation
Device 3 reaches spectroanalysis instrument 5.
Embodiment 5
The present invention provides one kind to be based on Fabry Perot chamber side throwing fibre optical sensor, and the sensor includes sequentially connected width
Band light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5；The circulator 3 passes through optical fiber
Bragg grating 6 is sequentially connected Fabry Perot chamber 7 and End optical fibers 8；The length L1 of the Fabry Perot chamber 7 is 55 μm,
The middle section of the fiber bragg grating 6 forms rubbing down face by side throwing, and the length L2 in the rubbing down face is 16mm, described
The depth H 2 in rubbing down face is 58 μm；The input transmission fiber 2, the output transmission fiber 4 and the fiber bragg grating 6
For single mode optical fiber, the End optical fibers 8 are single mode optical fiber.
It is provided in this embodiment to be prepared by the following method to obtain based on Fabry Perot chamber side throwing fibre optical sensor:
S1, the middle section of piece fiber bragg grating 6 is carried out after side throwing and another single mode using wheeled side throwing device
Optical fiber is attached by 9301 ultraviolet glue of Lantian board, forms Fabry Perot chamber 7 in the place of ultraviolet glue connection；
S2, wideband light source 1, input transmission fiber 2, circulator 3, output transmission fiber 4 and spectroanalysis instrument 5 are sequentially connected,
The circulator 3 is connect with the fiber bragg grating 6 of chamber containing Fabry Perot 7 in step S1；Wideband light source 1 is set to pass through circulation
Device 3 enters fiber bragg grating 6, Fabry Perot interference is reflected to form in Fabry Perot chamber 7, then pass through circulation
Device 3 reaches spectroanalysis instrument 5.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these are all to belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. being based on Fabry Perot chamber side throwing fibre optical sensor, it is characterised in that: the sensor includes sequentially connected broadband
Light source, input transmission fiber, circulator, output transmission fiber and spectroanalysis instrument；The circulator passes through optical fiber Bragg light
Grid are sequentially connected Fabry Perot chamber and End optical fibers.
2. according to claim 1 be based on Fabry Perot chamber side throwing fibre optical sensor, it is characterised in that: the Fabry
The length L1 of Perot cavity is 40-80 μm.
3. according to claim 1 be based on Fabry Perot chamber side throwing fibre optical sensor, it is characterised in that: the optical fiber cloth
The middle section of glug grating forms rubbing down face by side throwing.
4. according to claim 3 be based on Fabry Perot chamber side throwing fibre optical sensor, it is characterised in that: the rubbing down face
Length L2 be 10-20mm.
5. according to claim 3 be based on Fabry Perot chamber side throwing fibre optical sensor, it is characterised in that: the rubbing down face
Depth H 2 be 55-60 μm.
6. according to claim 1 described in any one of -5 claims based on Fabry Perot chamber side throwing fibre optical sensor,
It is characterized by: the input transmission fiber, the output transmission fiber and the fiber bragg grating are single mode optical fiber.
7. according to claim 1 described in any one of -5 claims based on Fabry Perot chamber side throwing fibre optical sensor,
It is characterized by: the End optical fibers are single mode optical fiber or multimode fibre.
8. the preparation method based on Fabry Perot chamber side throwing fibre optical sensor, which comprises the following steps:
S1, will be led to after the middle section progress side throwing of a fiber bragg grating with another optical fiber using wheeled side throwing device
It crosses ultraviolet glue to be attached, forms Fabry Perot chamber in the place of ultraviolet glue connection；
S2, wideband light source, input transmission fiber, circulator, output transmission fiber and spectroanalysis instrument are sequentially connected, it is described to follow
Ring device is connect with the fiber bragg grating of the chamber containing Fabry Perot in step S1；Wideband light source is set to enter optical fiber by circulator
Bragg grating interferes in the intracavitary Fabry Perot that reflects to form of Fabry Perot, then by circulator, reaches spectrum point
Analyzer.
9. the preparation method according to claim 8 based on Fabry Perot chamber side throwing fibre optical sensor, it is characterised in that:
The input transmission fiber, the output transmission fiber and the fiber bragg grating are single mode optical fiber.
10. the preparation method according to claim 8 based on Fabry Perot chamber side throwing fibre optical sensor, feature exist
In: the length L1 of the Fabry Perot chamber is 40-80 μm.
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Cited By (2)
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| CN110823808A (en) * | 2019-12-11 | 2020-02-21 | 南昌航空大学 | Tapered side-polished optical fiber biosensor and method for preparing tapered side-polished optical fiber |
| CN111504946A (en) * | 2020-04-10 | 2020-08-07 | 天津大学 | Preparation method of single-mode-multi-mode-single-mode structure flexible refractive index sensor |
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