CN107727123A - Modulated fiber type based on electrocaloric effect integrates Michelson interferometers - Google Patents
Modulated fiber type based on electrocaloric effect integrates Michelson interferometers Download PDFInfo
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- CN107727123A CN107727123A CN201710896517.7A CN201710896517A CN107727123A CN 107727123 A CN107727123 A CN 107727123A CN 201710896517 A CN201710896517 A CN 201710896517A CN 107727123 A CN107727123 A CN 107727123A
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- 239000000835 fiber Substances 0.000 title claims abstract description 140
- 230000000694 effects Effects 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 41
- 238000005485 electric heating Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000013307 optical fiber Substances 0.000 claims description 41
- 230000008859 change Effects 0.000 claims description 34
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000005253 cladding Methods 0.000 claims description 10
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- 238000000151 deposition Methods 0.000 claims description 7
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- 238000000034 method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004544 sputter deposition Methods 0.000 claims description 6
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- 238000012544 monitoring process Methods 0.000 abstract description 2
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- 238000005516 engineering process Methods 0.000 description 6
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- 238000000576 coating method Methods 0.000 description 3
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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- 239000003532 endogenous pyrogen Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 108010052620 leukocyte endogenous mediator Proteins 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- G01D5/35325—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 interferometer with two arms in reflection, e.g. Mickelson interferometer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/45—Interferometric spectrometry
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- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention is to provide a kind of modulated fiber type based on electrocaloric effect to integrate Michelson interferometers.Including light source, single-mode fiber belt device, optical taper, Asymmetric Twin-Core Fiber, electric heating array, power control system, speculum and photoelectric detection system, it is characterized in that：Light source is connected with the first port of the belt device of single-mode fiber, the second port of the belt device of single-mode fiber is connected by optical taper with one end of Asymmetric Twin-Core Fiber, 3rd port of the belt device of single-mode fiber is connected with photoelectric detection system, speculum is located at the other end of Asymmetric Twin-Core Fiber, described Asymmetric Twin-Core Fiber includes intermediate core and side core, electric heating array is located on the covering of Asymmetric Twin-Core Fiber side core side, and electric heating array is connected by wire with power control system.Present invention stability simple and compact for structure, system is good, easy to make, cost is low, and in Fibre Optical Sensor, optical information detection, external environment monitoring etc. have more wide application prospect.
Description
Technical field
The present invention relates to a kind of fibre optical sensor, specifically a kind of modulated fiber type integrates Michelson
Interferometer.
Background technology
From the 1970s, optical fiber perceives the Fibre Optical Sensor skill of external information as optical medium or sensor information is passed
Art flourishes, and fibre optical sensor is as a kind of optical sensing instrument, and oneself is through many fields in the daily production and living of people
All it is applied widely.Sensor is to refer to perceive external environmental information, and is transformed into electric signal or other shapes
The detection means that the signal of formula is transmitted, handles, stores and shown, it is to aid in the mankind to obtain the one of required external information
The essential perception instrument of kind.Traditional electric sensor there is some it is intrinsic the defects of, as transmission loss is big, multiplexing energy
The problems such as power difference is with easily by electromagnetic interference, particularly in some extreme operating environments, (such as strong-electromagnetic field, strong good fortune penetrate field, high temperature height
Pressure ring border etc.) under application be extremely restricted.And these shortcomings are then not present in fibre optical sensor, therefore taken in recent decades
Obtained extensive concern and greatly development.Interferometric optical fiber sensor based on phase-modulation be it is a kind of very typical and by
Widely used optical fiber sensing technology scheme.The high-performance optical fiber sensor applied at present, as optical fibre gyro, optical fiber water are listened
Device and optical fiber current mutual inductor etc. are all typical interferometric optical fiber sensors, these high performance interferometric optical fiber sensors
Occur promoting optical fiber sensing technology and the entirety of Fibre Optical Sensor industry is progressive.
Phase modulation-type fibre optical sensor is that the phase that the change of external environment parameter is converted into transmission light in optical fiber becomes
Change to obtain measured physical quantity, measured physical quantity is obtained generally by the mode of interferometry, thus it is also referred to as dry
Relate to type fibre optical sensor.Compared with other kinds of fibre optical sensor, the advantages of interferometric optical fiber sensor is most prominent is sensitive
Degree is high, and its non-sensitive part is made up of in itself optical fiber, can be designed to various multi-forms as required, easily multiplexing, has very
Good flexibility, has very high practical value.
Phase-modulator main at present has piezoelectric ceramic phase and lithium niobate phase modulator.
The content of the invention
It is an object of the invention to provide a kind of simple in construction, integrated level height, modulation are flexibly, easy to make based on electric heating
The modulated fiber type of effect integrates Michelson interferometers.
The object of the present invention is achieved like this：
Including light source, single-mode fiber go in ring device, optical taper, Asymmetric Twin-Core Fiber, electric heating array, power control system,
Speculum and photoelectric detection system, light source are connected with the first port of the belt device of single-mode fiber, and the second of the belt device of single-mode fiber
Port is connected by optical taper with one end of Asymmetric Twin-Core Fiber, and the 3rd port of the belt device of single-mode fiber fills with Photoelectric Detection
To put connected, speculum is located at the other end of Asymmetric Twin-Core Fiber, and described Asymmetric Twin-Core Fiber includes intermediate core and side core,
Electric heating array is located on the covering of Asymmetric Twin-Core Fiber side core side, and electric heating array is connected by wire with power control system
Connect.
The present invention can also include：
1st, described electric heating array includes resistive film and electrode, and resistive film is plated on the fibre cladding of side core side, resistance
Film directly contacts with fibre cladding, and electrode deposition contacts in resistive film upper surface both sides and with resistive film, electrode by wire with
Power control system is connected, by applying voltage to resistive film to produce electrocaloric effect, caused Joule heat after resistive film is powered,
Cause resistive film temperature change, cause to have the temperature difference between resistive film and Asymmetric Twin-Core Fiber and carry out hot biography to inside of optical fibre
Lead, change two fibre core temperature in Asymmetric Twin-Core Fiber, cause the refractive index of Asymmetric Twin-Core Fiber to change, it is asymmetric
In twin-core fiber there is refractive index difference in two fibre cores, produce optical path difference, produce phase place change, coordinate programmable voltage control electricity
Hot array, axially refractive index is changed along Asymmetric Twin-Core Fiber, change transmission optical path difference, realize the tune of interferometer phase
System.
2nd, described resistive film deposits to Asymmetric Twin-Core Fiber surface by mask means and metal sputtering film plating process.
3rd, the Asymmetric Twin-Core Fiber for a diameter of 125 microns, resistive film width are 200 microns, and the size of electrode is
15 microns.
4th, each electrical heating in electric heating array applies voltage separately through power control system.
5th, described speculum is the good fiber end face of cutting or the metal film for being plated on fiber end face.
The present invention is to provide a kind of modulated fiber type based on electrocaloric effect to integrate Michelson interferometers.Light source
It is connected with the go in ring first port of device of single-mode fiber, single-mode fiber device second port of going in ring passes through optical taper and asymmetric twin-core light
Fine one end is connected, and the 3rd port of the belt device of single-mode fiber is connected with photoelectric detection system, and electric heating array is in asymmetric fiber loop
The side of side core, speculum are located at the other end of Asymmetric Twin-Core Fiber.In the present invention, electric heating array includes resistive film and electricity
Pole, resistive film are directly contacted with fibre cladding, and resistive film is plated on the fibre cladding of side core side, and electrode deposition is on resistive film
Surface both sides, are contacted with resistive film, are connected by wire with power supply.The present invention to resistive film by applying voltage to produce electric heating
Effect.Resistive film can produce Joule heat after being powered, and cause the change of resistance film temperature, cause temperature between resistive film and optical fiber be present
Difference, therefore heat transfer can be carried out to inside of optical fibre, change two fibre core temperature in optical fiber, so as to cause the refractive index of optical fiber to occur
Change.Because resistive film is plated in side core side, so when heat transfer occurs, side core is different with the temperature change of intermediate core, therefore
In optical fiber there is refractive index difference in two fibre cores, produces optical path difference, thus produces phase place change.Coordinate programmable voltage control electricity
Hot array, refractive index is changed along optical fiber axial direction, change transmission optical path difference, realize the modulation of interferometer phase.
Resistive film in described optical fiber Thermo-optical modulator is plated on the covering of side core side, uniform film thickness, and resistive film is wide
Degree should be less than given size, and resistive film width is smaller, and modulated precision is higher (for example, for a diameter of 125 microns
Optical fiber, under with good heat dissipation environment, the width of resistive film is chosen as 200 microns).
Resistive film material be metal, metal oxide, alloy and other there is the material of electrical resistance property.
The resistive film is to deposit to optical fiber surface and and optical fiber by mask means technology of preparing and metal sputtering coating technique
Surface completely attaches to.
Electrode uniform deposition is in resistive film upper surface both sides, and the width of each electrode should be less than given size (example
Such as, the optical fiber for a diameter of 125 microns, the selection of resistive film width is 200 microns, and the size of electrode is chosen as 15 microns).
Described electric heating array is to be connected by spun gold wire with external electrode, and external electrode is connected with voltage control unit
, and each electrical heating can determine its voltage applied separately through control unit.
Optical fiber used is Asymmetric Twin-Core Fiber, and two core spacing should be greater than given size (for example, for a diameter of
125 microns of Asymmetric Twin-Core Fiber, to avoid the light of two fibre cores from coupling, fibre core spacing is chosen as 25 microns).
Described speculum is the good fiber end face of cutting or the metal film for being plated on fiber end face.
Described optical taper is by being melted after single-mode fiber welds with Asymmetric Twin-Core Fiber to core at solder joint
Melt the optical taper for drawing cone to make；Light in single-mode fiber is coupled into asymmetric twin-core by the optical taper according to certain splitting ratio
In the intermediate core and side core of optical fiber, or by the light transmitted in intermediate core and side core while it is coupled into single-mode fiber.
The modulated property of the interferometer is to control the quantity of electrified regulation by PLC technology unit and apply electricity
The size of pressure realizes the modulated property of phase.
The interferometer provides stable encapsulation and heat dissipation environment by heat conductive silica gel and package casing.
The present invention utilizes the refractive index of fibre core in Asymmetric Twin-Core Fiber to vary with temperature this characteristic, complete by electrical modulation
Into the change of optical path difference, finally realize that modulated fiber type integrates the making of Michelson interferometers.
The present invention is to be based on electrocaloric effect and fiber interference principle, using fiber core refractive index in Asymmetric Twin-Core Fiber with
This characteristic of temperature change, phase-modulation is obtained by changing the number of the voltage applied to Electric radiant Heating Film and energization Electric radiant Heating Film,
Realize the modulated property of Michelson interferometers.Below exemplified by being measured using wide spectrum light source, specifically give the present invention's
Operation principle.
When applying voltage at resistive film both ends, resistive film can produce Joule heat in the presence of electric current, by Joule heat
Formula
Q=I2Rt
Know, over time, Joule heat caused by Electric radiant Heating Film can be cumulative, thus can cause resistance film temperature
Change
Q=cm Δs T
Wherein c is the specific heat of resistive film, and m is resistive qualities, and Δ T is the change of temperature.
There is the temperature difference in the resistive film after heating, therefore will cause Heat Conduction Phenomenon with optical fiber.Temperature will be along optical fiber radially
Propagate, cause the change of the temperature of side core and intermediate core, be finally reached thermal balance, by finite difference calculus by model discretization,
Node one by one is obtained, it can be seen from law of conservation of energy and Fourier law, is had to each node
Ei+Eg=Eo+Es
Wherein, EiItem is flowed into for energy；EgItem occurs for energy, is that node endogenous pyrogen is discharged within the unit interval
Heat；EoFor energy output item；EsChange item for energy storage, be the increment of material interior energy in unit interval node.With iterative method
The numerical solution of each node temperature can be calculated, Temperature Distribution during stable state may finally be obtained, can also pass through simulation software
Obtain temperature distribution image.
Model is established according to Fig. 4 and is emulated, wherein, the material of resistive film and electrode is gold, the electrode in side
Apply voltage V on 6-2-1, another lateral electrode 6-2-2 ground connection, Temperature Distribution when reaching stable state is as shown in figure 5, the number that will be obtained
According to being analyzed and processed, the index distribution of two fibre cores can be obtained, as shown in Fig. 6 a- Fig. 6 b.
The change of temperature will cause the change of refractive index, so as to realize the modulation to incident light phase.Optical fibre refractivity n is not
Only it is the function of wavelength X, but also changes with environment temperature T and residing strain regime ε.Therefore, optical fibre refractivity can one
As described with a function of state n (λ, T, ε).
Due to factors such as fiber optic materials, doping concentration, measuring environment, measuring methods, very accurate refraction is hardly resulted in
Rate temperature coefficient function, but through existing document many experiments measurement and demonstration, the thermal refractive index coefficient of optical fiber is substantially 10-5/
The change of DEG C this magnitude, and in the case where excluding extraneous other factors interference, refractive index shows a kind of linear with temperature
Change.
Therefore, when heat conduction is stable, optical fiber intermediate core and side core will have temperature difference, so can cause refractive indices
N presence, so the optical path difference between two fibre cores is changed into Δ nL, wherein L is the length of energization resistive film.
Because light reflects in end face, it is eventually coupled to interfere in single-mode fiber, there are 2 Δ nL=by interference theorem
M λ, m are order of interference.Apply voltage when changing, refractive index can be caused to change, the adjustment sub- number of electrified regulation can modulate
The position of output spectrum interference peaks.
Present invention stability simple and compact for structure, system is good, easy to make, cost is low, in Fibre Optical Sensor, optical information
Detection, external environment monitoring etc. have more wide application prospect.
Brief description of the drawings
Fig. 1 is that the modulated fiber type based on electrocaloric effect integrates Michelson interferometer schematic diagrames.
Fig. 2 is electric heating array structure schematic diagram.
Fig. 3 is Asymmetric Twin-Core Fiber cross section structure schematic diagram.
Fig. 4 is simulation model schematic diagram.
Temperature Distribution schematic diagram when Fig. 5 is heat conduction stable state.
Fig. 6 a- Fig. 6 b be the cycle it is different resistive film heating after two fiber core refractive index change schematic diagrams.
Fig. 7 is encapsulation schematic diagram.
Embodiment
Illustrate below and the present invention is described in more detail.
Fig. 1 gives the modulated fiber type based on electrocaloric effect and integrates Michelson embodiment of interferometer.Including light source
1st, the belt device 3 of single-mode fiber 2-1 to 2-3, single-mode fiber, optical taper 4, Asymmetric Twin-Core Fiber 5, electric heating array 6, voltage control
Unit 7, speculum 8 and photoelectric detection system 9；The first end that light source passes through the first single-mode fiber 2-1 and the belt device of single-mode fiber
Mouth is connected, and the belt device second port of single-mode fiber passes through the second single-mode fiber 2-2 and optical taper 4 and Asymmetric Twin-Core Fiber 5
One end is connected, and the 3rd port of the belt device of single-mode fiber is connected by the 3rd single-mode fiber 2-3 with photoelectric detection system 9, electric heating
Array 6 is located at the other end of Asymmetric Twin-Core Fiber in the side of asymmetric fiber loop side core, speculum 8.It is asymmetric in the present invention
Twin-core fiber 5, including intermediate core 5-1, side core 5-2 and fibre cladding, electric heating array include resistive film 6-1 and electrode 6-2, resistance
Film directly contacts with fibre cladding, and resistive film is plated in the fibre cladding of side core side, electrode deposition in resistive film upper surface both sides,
Contact with resistive film, be connected by spun gold with external electrode, external electrode is connected with control power supply.The present invention to resistive film by applying
Voltage produces electrocaloric effect.Resistive film be powered after can produce Joule heat, cause the change of resistance film temperature, cause resistive film with
The temperature difference between optical fiber be present, therefore Heat Conduction Phenomenon can occur, change two fibre core temperature in optical fiber, so as to cause the refractive index of optical fiber
Change.Because resistive film is plated in side core side, so when heat transfer occurs, side core is different with the temperature change of intermediate core,
Side core temperature is more than intermediate core, therefore two fiber core refractive indexs are different, can produce optical path difference, thus produces interference.Coordinate programmable
Heating subarray, control the variations in refractive index along optical fiber axial direction, and then change transmission light path, realize the adjustable of interferometer phase
Property processed.
Described resistive film is plated in by way of sputter coating on the covering of optical fiber side core side, and material used should
With resistance characteristic.
Described electrode deposition is in the both sides of resistive film upper surface, and by being connected to wire with external electrode, external electrode
It is connected with control power supply.Described speculum is the good fiber end face of cutting or the metal film for being plated on fiber end face.Institute
The optical taper stated be by the way that first single-mode fiber and Asymmetric Twin-Core Fiber are welded to core, after fused biconical taper system is carried out at solder joint
Make what the mode of optical taper obtained；Described optical taper is coupled into the light in single-mode fiber according to certain splitting ratio asymmetric
In the intermediate core and side core of twin-core fiber, or by the light transmitted in intermediate core and side core while it is coupled into single-mode fiber.
Described light source can be wide spectrum light source, or tunable narrowband optical source；Described photoelectric detection system is spectrum analysis
Instrument.
To realize the modulated property of output interference spectrum, the present invention with the method for metal coating sputtering, passes through mask first
Plate ad-hoc location on the cladding surface of the side core side of Asymmetric Twin-Core Fiber plates last layer resistance film.Photoetching is used afterwards
Technology is modified to resistive film profile.Then, mask plate is replaced, controlled by computer, be moved to position set in advance
Put.Coating Materials is replaced simultaneously, the making of electrode is carried out again by the method for sputter coating.Then will complete
Michelson interferometers are removed, and are put into given environment and are made annealing treatment (for example, for using nichrome conduct
Resistive film material, after the completion of plated film, the interferometer can be put into 450-500 degrees Celsius of environment and be annealing 110-
130 minutes), for electric heating array structure as shown in Fig. 2 6-1 is resistive film, 6-2 is the electrode of deposition.
Optical taper 4 shown in Fig. 1 is by the side of single-mode fiber and Asymmetric Twin-Core Fiber weld fused biconical taper
What formula obtained.Fig. 7 is encapsulation schematic diagram, wherein 10 be optical fiber tail sleeve, 11 be metal external electrode, is connected with power supply, and 12 be encapsulation
Shell.
When device works, by controlling the electric signal size flowed into, size caused by Joule heat can be controlled, so as to cause
Refractive index changes in optical fiber, and the variations in refractive index under different cycles in two fibre cores is as shown in Fig. 6 a- Fig. 6 b.So can be with
The change of optical path difference is realized by adjusting the sub- number of electrified regulation, so as to realize the modulated property of output interference spectrum.
Claims (7)
1. a kind of modulated fiber type based on electrocaloric effect integrates Michelson interferometers, including light source, single-mode fiber go in ring
Device, optical taper, Asymmetric Twin-Core Fiber, electric heating array, power control system, speculum and photoelectric detection system, it is characterized in that：
The go in ring first port of device of light source and single-mode fiber is connected, single-mode fiber go in ring device second port by optical taper with it is asymmetric
One end of twin-core fiber is connected, and the 3rd port of the belt device of single-mode fiber is connected with photoelectric detection system, and speculum is positioned at non-right
Claim the other end of twin-core fiber, described Asymmetric Twin-Core Fiber includes intermediate core and side core, and electric heating array is located at asymmetric double
On the covering of core fibre side core side, electric heating array is connected by wire with power control system.
2. the modulated fiber type according to claim 1 based on electrocaloric effect integrates Michelson interferometers, its feature
It is：Described electric heating array includes resistive film and electrode, and resistive film is plated on the fibre cladding of side core side, resistive film directly with
Fibre cladding contacts, and electrode deposition contacts in resistive film upper surface both sides and with resistive film, and electrode passes through wire and power supply
System is connected, and produces electrocaloric effect by applying voltage to resistive film, caused Joule heat after resistive film is powered, causes resistance
Film temperature changes, and causes to have the temperature difference between resistive film and Asymmetric Twin-Core Fiber and carries out heat transfer to inside of optical fibre, it is non-right to make
Claim two fibre core temperature in twin-core fiber to change, cause the refractive index of Asymmetric Twin-Core Fiber to change, Asymmetric Twin-Core Fiber
There is refractive index difference in interior two fibre core, produce optical path difference, produce phase place change, coordinate programmable voltage control electric heating array,
Axially refractive index is changed along Asymmetric Twin-Core Fiber, change transmission optical path difference, realize the modulation of interferometer phase.
3. the modulated fiber type according to claim 2 based on electrocaloric effect integrates Michelson interferometers, its feature
It is：Described resistive film deposits to Asymmetric Twin-Core Fiber surface by mask means and metal sputtering film plating process.
4. the modulated fiber type according to claim 2 based on electrocaloric effect integrates Michelson interferometers, its feature
It is：For a diameter of 125 microns of Asymmetric Twin-Core Fiber, resistive film width is 200 microns, and the size of electrode is 15 microns.
5. the modulated fiber type based on electrocaloric effect according to Claims 1-4 any one integrates Michelson and done
Interferometer, it is characterized in that：Each electrical heating in electric heating array applies voltage separately through power control system.
6. the modulated fiber type based on electrocaloric effect according to Claims 1-4 any one integrates Michelson and done
Interferometer, it is characterized in that：Described speculum is the good fiber end face of cutting or the metal film for being plated on fiber end face.
7. the modulated fiber type according to claim 5 based on electrocaloric effect integrates Michelson interferometers, its feature
It is：Described speculum is the good fiber end face of cutting or the metal film for being plated on fiber end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896517.7A CN107727123B (en) | 2017-09-28 | 2017-09-28 | Adjustable type fiber integration Michelson interferometer based on electric heating effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710896517.7A CN107727123B (en) | 2017-09-28 | 2017-09-28 | Adjustable type fiber integration Michelson interferometer based on electric heating effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107727123A true CN107727123A (en) | 2018-02-23 |
| CN107727123B CN107727123B (en) | 2020-01-17 |
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| CN201710896517.7A Active CN107727123B (en) | 2017-09-28 | 2017-09-28 | Adjustable type fiber integration Michelson interferometer based on electric heating effect |
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| CN110927113A (en) * | 2019-10-29 | 2020-03-27 | 桂林电子科技大学 | Fiber integrated hydrogen sensor and manufacturing method thereof |
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