CN208367225U - Differential Michelson fiber optic interferometric senses geophone - Google Patents
Differential Michelson fiber optic interferometric senses geophone Download PDFInfo
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- CN208367225U CN208367225U CN201821084222.6U CN201821084222U CN208367225U CN 208367225 U CN208367225 U CN 208367225U CN 201821084222 U CN201821084222 U CN 201821084222U CN 208367225 U CN208367225 U CN 208367225U
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Abstract
The utility model discloses a kind of differential Michelson fiber optic interferometrics to sense geophone, it is related to technical field of optical fiber sensing, it includes narrow linewidth laser, the first photodetector, the second photodetector, 1X2 coupler, the first 2X2 coupler and the 2nd 2X2 coupler, further includes support shaft, mass body, the first fiber optic loop, the second fiber optic loop, first faraday's fiber reflector, second faraday's fiber reflector, third faraday fiber reflector and the 4th faraday's fiber reflector.The utility model is not only simple in structure, good economy performance, and has and respond the advantages such as fast, highly reliable, advanced prediction, in terms of application prospect it is very wide.
Description
Technical field
The utility model relates to technical field of optical fiber sensing, are specifically a kind of differential Michelson fiber optic interferometric sensings
Geophone.
Background technique
With going deep into for the development of seismic exploration technique, especially high-resolution exploration, to seismic prospecting data collecting
Precision and quality requires also higher and higher, it is desirable that acquisition data have wideband, high-fidelity, high s/n ratio, high dynamic, so as to more preferable
Ground identify geologic structure, lithology, fluid, Fractured Reservoir, improve reservoir location, Reservoir Characters, oil reservoir continuity description and mention
High recovery rate etc..The geophone of one of component as field data collection key, performance it is good with it is bad, will directly close
It is the effect to the acquisition quality of data and geological analysis.
In routine reflection seismic exploration, the frequency range of earthquake significant wave is received generally between 3Hz~300Hz, and
It is required that sensor is linear, stable to the phase of vibration and amplitude-frequency response in this frequency range.In current seismic prospecting
In the wave detector that field uses, induction wave detector, pressure-sensitive geophone and digital sensing can be divided into for working principle
Device is digital detector, currently, it is induction wave detector that dosage is maximum, can also divide conventional wave detector among these and surpass
Grade wave detector etc..
Electromagnetic induction principle is to utilize upper and lower two coil windings on aluminum bobbin, a coasting body is formed, by bullet
Reed is suspended in the magnetic field of permanent magnet generation, and permanent magnet is fixed together with wave detector shell.When wave detector shell with
When earth shock, coil is caused to move relative to permanent magnet, two coils generate induced electromotive force, with wave detector case vibration
Size variation, induced electromotive force also changes therewith, and speed is bigger, and induced potential is also big, when wave detector shakes, in wave detector
Output end exports corresponding electric signal, is transferred to seismic instrument.The connection of two coils should meet: in coiling, one
Coil is just rewound around another coil, and the terminal of coil and the origin or beginning of lower coil are linked togather (Opposite direction connection), up and down
Other two end of coil is as output end.When coil is moved with respect to magnet steel, since the magnetic direction of two coils is on the contrary, institute
It is added in the same direction with the induced potential of two coils of connection.External magnetic field is interfered, the induction of two coils of Opposite direction connection
Potential is reversely offset, and which improves anti-interference abilities.
The permanent magnet of induction wave detector due to by temperature, magnetic influence is big, oxidizable and magnetic field is unstable, earthquake
The sensitivity of wave detector is low, stability and poor repeatability.Site workload is big, and natural frequency selection is more, needs a large amount of inspection
The combination of wave device, arrangement is complicated, and intensity is big.In actual detection operations, geological prospecting personnel need to carry a large amount of measurement equipment,
When especially laying detector array, heavy cable and numerous detectors make us unbearably load.And it detects place and often exists
Among the great Lin of remote mountains, heavy workload, meanwhile, interference of the detector cable vulnerable to external electromagnetic field influences the reliability of data.
Utility model content
In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of differential Michelson optical fiber
Interference sensing geophone is not only simple in structure, good economy performance, and is had and responded the advantages such as fast, highly reliable, advanced pre-
Report, petroleum exploration etc. application prospect are very wide.
To achieve the above objectives, the technical scheme adopted by the utility model is that: a kind of differential Michelson fiber optic interferometric passes
Feel geophone, including narrow linewidth laser, the first photodetector, the second photodetector, 1X2 coupler, the first 2X2
Coupler and the 2nd 2X2 coupler, wherein the input terminal of 1X2 coupler is connect by the first optical fiber with narrow linewidth laser；The
One input terminal of one 2X2 coupler is connect by the second optical fiber with an output end of 1X2 coupler, and the one of the first 2X2 coupler
Output end is connect by the 4th optical fiber with the first photodetector；One input terminal of the 2nd 2X2 coupler by third optical fiber with
Another output end of 1X2 coupler connects, and an output end of the 2nd 2X2 coupler passes through the 5th optical fiber and the second photodetector
Connection；It further include support shaft, mass body, the first fiber optic loop, the second fiber optic loop, first faraday's fiber reflector, second farad
Fiber reflector, third faraday fiber reflector and the 4th faraday's fiber reflector；First fiber optic loop and second
Fiber optic loop is uniformly looped around the position that two close end is leaned on the outside of support shaft respectively；One end of first fiber optic loop passes through six fibers
It is connect with another input terminal of the first 2X2 coupler, the other end of the first fiber optic loop passes through the 7th optical fiber and the first 2X2 coupler
Another output end connection；One end of second fiber optic loop passes through another input terminal of the 8th optical fiber and the 2nd 2X2 coupler
The other end of connection, the second fiber optic loop is connect by the 9th optical fiber with another output end of the 2nd 2X2 coupler；The mass body
It is slideably positioned in support shaft；The first faraday fiber reflector and the 4th faraday's fiber reflector form one group of reflection
The side of mass body is arranged in mirror；The first faraday fiber reflector is connected by the tenth optical fiber with the first fiber optic loop, institute
The 4th faraday's fiber reflector is stated to be connected by the 13rd optical fiber with the first fiber optic loop；The second faraday fiber reflector
One group of reflecting mirror is formed with third faraday's fiber reflector, the other side of mass body is set；The second faraday optical fiber
Reflecting mirror is connected by the 11st optical fiber with the second fiber optic loop, the third faraday fiber reflector pass through the 12nd optical fiber and
Second fiber optic loop is connected.
It based on the above technical solution, further include the barrel-shaped shell of stainless steel, the inside of the barrel-shaped shell of the stainless steel is
Vacuum, the support shaft, mass body, the first fiber optic loop, the second fiber optic loop, first faraday's fiber reflector, the second faraday
Fiber reflector, third faraday fiber reflector and the 4th faraday's fiber reflector are packaged in the barrel-shaped shell of stainless steel
It is interior.
Based on the above technical solution, the both ends of the barrel-shaped shell of the stainless steel are respectively arranged with the first protection sleeve pipe
Penetrate the first protection sleeve pipe with the both ends of the second protection sleeve pipe, first fiber optic loop, respectively with six fibers and the 7th light
Fibre is connected；The both ends of second fiber optic loop penetrate the second protection sleeve pipe, are connected respectively with the 8th optical fiber and the 9th optical fiber.
Based on the above technical solution, the first sensing is respectively arranged on the inside of the both ends of the barrel-shaped shell of the stainless steel
Device pedestal and second sensor pedestal, and first sensor pedestal is connect by sealant with the first fiber optic loop, second sensor
Pedestal is connect by sealant with the second fiber optic loop.
Based on the above technical solution, the mass body is the sphere with center cavity.
Based on the above technical solution, first optical fiber, the second optical fiber, third optical fiber, the 4th optical fiber, the 5th light
Fibre, six fibers, the 7th optical fiber, the 8th optical fiber, the 9th optical fiber, the tenth optical fiber, the 11st optical fiber, the 12nd optical fiber and the 13rd
Optical fiber is single mode optical fiber.
Based on the above technical solution, 40 milliwatts that the narrow linewidth laser is used to issue that wavelength to be 1550nm connect
Continuous laser.
Based on the above technical solution, the inside optical power of second optical fiber and third optical fiber is 20 milliwatts.
Based on the above technical solution, six fibers are connected to one end of the tenth optical fiber by the first fiber optic loop, the
The other end of ten optical fiber is connect with first faraday's fiber reflector；
7th optical fiber is connected to one end of the 13rd optical fiber, the other end and the 4th of the 13rd optical fiber by the first fiber optic loop
The connection of faraday's fiber reflector.
Based on the above technical solution, the 8th optical fiber is connected to one end of the 11st optical fiber by the second fiber optic loop,
The other end of 11st optical fiber is connect with second faraday's fiber reflector；
9th optical fiber is connected to one end of the 12nd optical fiber, the other end and third of the 12nd optical fiber by the second fiber optic loop
The connection of faraday's fiber reflector.
The utility model has the beneficial effects that:
The utility model uses Michelson's interferometer principle, and design rules acceleration transducer, sensor is with light
For measurement medium, using photoelectric device as the sensor of conversion element, it has non-contact, fast, reliable performance of response etc. brilliant special
Property.With the rapid development of Optoelectronics Technology, fiber optic interferometric seismic sensor oneself become various photodetector systems in realize photoelectricity
The key element of conversion, and occupied an important position in sensor application, wherein being even more to play the part of in non-contact measurement field
The irreplaceable role of the person of drilling.When photoelectric sensor works, photoelectric device is responsible for luminous energy (infra-red radiation, visible light and ultraviolet
Radiation) signal is converted to electrical signal.This sensor is not only simple in structure, good economy performance, and have respond it is fast, highly reliable
Etc. advantages, advanced prediction, in terms of application prospect it is very wide.
Detailed description of the invention
Fig. 1 is the structural representation that differential Michelson fiber optic interferometric senses geophone in the utility model embodiment
Figure.
Appended drawing reference:
1- narrow linewidth laser；The first optical fiber of 2-；3-1X2 coupler；The second optical fiber of 4-；The first 2X2 coupler of 5-；6-
Six fibers；The first protection sleeve pipe of 7-；8- first sensor pedestal；The barrel-shaped shell of 9- stainless steel；The tenth optical fiber of 10-；11- mass
Body；The 11st optical fiber of 12-；The second fiber optic loop of 13-；14- second sensor pedestal；The second protection sleeve pipe of 15-；The 8th optical fiber of 16-；
The 9th optical fiber of 17-；The 12nd optical fiber of 18-；The 13rd optical fiber of 19-；20- support shaft；The first fiber optic loop of 21-；The 2nd 2X2 coupling of 22-
Clutch；23- third optical fiber；The 5th optical fiber of 24-；The 7th optical fiber of 25-；The 4th optical fiber of 26-；The first photodetector of 27-；28-
Two photodetectors；10a- the first faraday fiber reflector；10b- the second faraday fiber reflector；10c- third faraday
Fiber reflector；The 4th faraday's fiber reflector of 10d-.
Specific embodiment
The embodiments of the present invention are described below in detail, the embodiment described example is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.
In the description of the present invention, it should be noted that for the noun of locality, if any term " center ", " laterally
(X) ", " longitudinal (Y) ", " vertical (Z) ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right",
The indicating positions such as "vertical", "horizontal", "top", "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship be based on
Orientation or positional relationship shown in the drawings is merely for convenience of narration the utility model and simplifies description, rather than instruction or dark
Showing signified device or element must have a particular orientation, be constructed and operated with particular orientation, should not be understood as limiting this reality
With novel specific protection scope.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the utility model description, " several ", " several " are meant that two or more, remove
It is non-separately to have clearly specific restriction.
Made below with reference to the attached drawing of specification by being further described to specific embodiment of the present utility model
The technical solution of the utility model and its benefits are clearer.Describing embodiment below with reference to attached drawing is to show
Example property, it is intended to explain the utility model, and should not be understood as limiting the present invention.
Shown in Figure 1, the utility model embodiment provides a kind of differential Michelson fiber optic interferometric sensing earthquake inspection
Wave device, including narrow linewidth laser 1, the first photodetector 27, the second photodetector 28,1X2 coupler 3, the first 2X2 coupling
Clutch 5 and the 2nd 2X2 coupler 22, wherein the input terminal of 1X2 coupler 3 is connected by the first optical fiber 2 with narrow linewidth laser 1
It connects；One input terminal of the first 2X2 coupler 5 is connect by the second optical fiber 4 with an output end of 1X2 coupler 3, the first 2X2 coupling
One output end of clutch 5 is connect by the 4th optical fiber 26 with the first photodetector 27；One input terminal of the 2nd 2X2 coupler 22
It is connect by third optical fiber 23 with another output end of 1X2 coupler 3, an output end of the 2nd 2X2 coupler 22 passes through the 5th
Optical fiber 24 is connect with the second photodetector 28；It further include support shaft 20, mass body 11, the first fiber optic loop 21, the second fiber optic loop
13, first faraday's fiber reflector 10a, second faraday's fiber reflector 10b, third faraday's fiber reflector 10c and
4th faraday's fiber reflector 10d；
First fiber optic loop 21 and the second fiber optic loop 13 are uniformly looped around the position that two close end is leaned on the outside of support shaft 20 respectively；The
One end of one fiber optic loop 21 is connect by six fibers 6 with another input terminal of the first 2X2 coupler 5, the first fiber optic loop 21
The other end is connect by the 7th optical fiber 25 with another output end of the first 2X2 coupler 5；One end of second fiber optic loop 13 passes through the
Eight optical fiber 16 are connect with another input terminal of the 2nd 2X2 coupler 22, and the other end of the second fiber optic loop 13 passes through the 9th optical fiber 17
It is connect with another output end of the 2nd 2X2 coupler 22；
Mass body 11 is slideably positioned in support shaft 20；Specifically, mass body 11 is the sphere with center cavity, Ke Yiyan
Support shaft 20 moves back and forth.
Sensor design uses differential match lattice Neck interferometer structure, and the first fiber optic loop 21 and the second fiber optic loop 13 constitute difference
The earthquake wave amplitude and frequency that dynamic light arm perception compression respectively and is stretched.
First faraday's fiber reflector 10a and the 4th faraday's fiber reflector 10d forms one group of reflecting mirror, and setting exists
The side of mass body 11；First faraday's fiber reflector 10a is connected by the tenth optical fiber 10 with the first fiber optic loop 21, the 4th method
Fiber reflector 10d is drawn to be connected by the 13rd optical fiber 19 with the first fiber optic loop 21；Specifically, six fibers 6 pass through first
Fiber optic loop 21 is connected to one end of the tenth optical fiber 10, and the other end of the tenth optical fiber 10 and first faraday's fiber reflector 10a connect
It connects；7th optical fiber 25 is connected to one end of the 13rd optical fiber 19 by the first fiber optic loop 21, the other end of the 13rd optical fiber 19 with
4th faraday's fiber reflector 10d connection.Michelson's interferometer is by the first 2X2 coupler 5, six fibers 6 and the 7th light
Fine 25, first fiber optic loop 21, first faraday's fiber reflector 10a and the 4th faraday's fiber reflector 10d composition.First light
The weak vibration of fine ring 21 can generate interference light in the first 2X2 coupler 5, be reflected into the 4th optical fiber 26, the 4th optical fiber 26 and the
The connection of one photodetector 27, converts optical signals into electric signal.
Second faraday's fiber reflector 10b and third faraday's fiber reflector 10c forms one group of reflecting mirror, and setting exists
The other side of mass body 11；Second faraday's fiber reflector 10b is connected by the 11st optical fiber 12 with the second fiber optic loop 13, the
Three faraday's fiber reflector 10c are connected by the 12nd optical fiber 18 with the second fiber optic loop 13.Specifically, the 8th optical fiber 16 passes through
Second fiber optic loop 13 is connected to one end of the 11st optical fiber 12, the other end of the 11st optical fiber 12 and second faraday's fiber reflection
Mirror 10b connection；9th optical fiber 17 is connected to one end of the 12nd optical fiber 18 by the second fiber optic loop 13, the 12nd optical fiber 18 it is another
One end is connect with third faraday's fiber reflector 10c.Michelson's interferometer is by the 2nd 2X2 coupler 22, the 8th optical fiber 16
With the 9th optical fiber 17, the second fiber optic loop 13, second faraday's fiber reflector 10b and third faraday's fiber reflector 10c group
At.The weak vibration of second fiber optic loop 13 can generate interference light in the 2nd 2X2 coupler 22, be reflected into the 5th optical fiber 24, and the 5th
Optical fiber 24 is connect with the second photodetector 28, converts optical signals into electric signal.
Specifically, differential Michelson fiber optic interferometric sensing geophone further includes the barrel-shaped shell 9 of stainless steel, this is stainless
The inside of steel drum shape shell 9 is vacuum, support shaft 20, mass body 11, the first fiber optic loop 21,13, first farads of the second fiber optic loop
Fiber reflector 10a, second faraday's fiber reflector 10b, third faraday's fiber reflector 10c and the 4th faraday's light
Fine reflecting mirror 10d is packaged in the barrel-shaped shell 9 of stainless steel.Support shaft 20 is an axis, in entire sensor internal
The heart.First fiber optic loop 21, the second fiber optic loop 13 and mass block 11 constitute match lattice Neck interferometer sensor, Vibration Signal in Frequency Domain meeting
So that mass block 11 is generated sliding motion, stretches or compress the first fiber optic loop 21, the second fiber optic loop 13, generate reciprocal micromotion, match
Lattice Neck interferometer can generate interference signal.
Specifically, the both ends of the barrel-shaped shell 9 of stainless steel are respectively arranged with the first protection sleeve pipe 7 and the second protection sleeve pipe 15,
The both ends of first fiber optic loop 21 penetrate the first protection sleeve pipe 7, are connected respectively with six fibers 6 and the 7th optical fiber 25；Second light
The both ends of fine ring 13 penetrate the second protection sleeve pipe 15, are connected respectively with the 8th optical fiber 16 and the 9th optical fiber 17.
Specifically, being respectively arranged with first sensor pedestal 8 and second sensor on the inside of the both ends of the barrel-shaped shell 9 of stainless steel
Pedestal 14, and first sensor pedestal 8 is connect by sealant with the first fiber optic loop 21, second sensor pedestal 14 passes through sealing
Glue is connect with the second fiber optic loop 13.
Specifically, the first optical fiber 2, the second optical fiber 4, third optical fiber 23, the 4th optical fiber 26, the 5th optical fiber 24, six fibers
6, the 7th optical fiber 25, the 8th optical fiber 16, the 9th optical fiber 17, the tenth optical fiber 10, the 11st optical fiber 12, the 12nd optical fiber 18 and the tenth
Three optical fiber 19 are single mode optical fiber.
Specifically, narrow linewidth laser 1 is used to issue the 40 milliwatt continuous lasers that wavelength is 1550nm.Second optical fiber, 4 He
The inside optical power of third optical fiber 23 is 20 milliwatts.
The course of work of the utility model:
Narrow linewidth laser 1 issues the 40 milliwatt continuous lasers that wavelength is 1550nm and enters the first optical fiber 2, the first optical fiber 2
Internal continuous laser generates beam splitting, the laser of power-take-off each 50%, into 4 He of the second optical fiber after entering 1X2 coupler 3
Third optical fiber 23, the second optical fiber 4 and 23 inside optical power of third optical fiber are 20 milliwatts.
Narrow-linewidth laser inputs the second optical fiber 4, and into the input terminal of the first 2X2 coupler 5, laser passes through the first 2X2 coupling
Clutch 5 is exported in six fibers 6 and 25 end of the 7th optical fiber respectively, and light is to pass in opposite directions inside six fibers 6 and the 7th optical fiber 25
Defeated, six fibers 6 and the 7th optical fiber 25 are in sensor internal the first fiber optic loop 21 of composition, the first fiber optic loop 21 and the first faraday
Fiber reflector 10a and the 4th faraday's fiber reflector 10d constitutes the Michelson's interferometer of a ring structure, faint
Stretching or compression can make the laser signal inside the first fiber optic loop 21 generate Michelson interference effect, and interference light passes through the 4th light
Fibre 26 is output to the first photodetector 27, converts optical signals into electric signal output.
Another way light is the another way narrow-linewidth laser input third optical fiber 23 of 1X2 coupler 3, is coupled into the 2nd 2X2
The input terminal of device 22, laser pass through the 2nd 2X2 coupler 22, export respectively in the 8th optical fiber 16 and 17 end of the 9th optical fiber, light exists
It is to transmit in opposite directions inside 8th optical fiber 16 and the 9th optical fiber 17, the 8th optical fiber 16 and the 9th optical fiber 17 are in sensor internal composition the
Two fiber optic loops 13, the second fiber optic loop 13 and second faraday's fiber reflector 10b and third faraday's fiber reflector 10c are constituted
The Michelson's interferometer of one ring structure, faint stretching or compression can be such that the laser signal inside the second fiber optic loop 13 produces
Raw Michelson interference effect, interference light is output to the second photodetector 28 by the 5th optical fiber 24, by optical signal conversion
It is exported at electric signal.
In the description of specification, reference term " one embodiment ", " preferably ", " example ", " specific example " or " one
The description of a little examples " etc. means particular features, structures, materials, or characteristics described in conjunction with this embodiment or example, is contained in
In at least one embodiment or example of the utility model, in the present specification not necessarily for the schematic representation of above-mentioned term
Refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any one
It is combined in a suitable manner in a or multiple embodiments or example.
The utility model is not limited to above embodiment, for those skilled in the art, not
Under the premise of being detached from the utility model principle, several improvements and modifications can also be made, these improvements and modifications are also considered as this reality
Within novel protection scope.The content being not described in detail in this specification belongs to well known to professional and technical personnel in the field
The prior art.
Claims (10)
1. a kind of differential Michelson fiber optic interferometric senses geophone, including narrow linewidth laser (1), the first photodetection
Device (27), the second photodetector (28), 1X2 coupler (3), the first 2X2 coupler (5) and the 2nd 2X2 coupler (22),
In, the input terminal of 1X2 coupler (3) is connect by the first optical fiber (2) with narrow linewidth laser (1)；First 2X2 coupler (5)
An input terminal connect with an output end of 1X2 coupler (3) by the second optical fiber (4), the one of the first 2X2 coupler (5) is defeated
Outlet is connect by the 4th optical fiber (26) with the first photodetector (27)；One input terminal of the 2nd 2X2 coupler (22) passes through
Third optical fiber (23) is connect with another output end of 1X2 coupler (3), and an output end of the 2nd 2X2 coupler (22) passes through the
Five optical fiber (24) are connect with the second photodetector (28)；It is characterized by also including support shaft (20), mass body (11),
One fiber optic loop (21), the second fiber optic loop (13), first faraday's fiber reflector (10a), second faraday's fiber reflector
(10b), third faraday fiber reflector (10c) and the 4th faraday's fiber reflector (10d)；
First fiber optic loop (21) and the second fiber optic loop (13) are uniformly looped around on the outside of support shaft (20) respectively by two close end
Position；One end of first fiber optic loop (21) is connected by another input terminal of six fibers (6) and the first 2X2 coupler (5)
It connects, the other end of the first fiber optic loop (21) is connect by the 7th optical fiber (25) with another output end of the first 2X2 coupler (5)；
One end of second fiber optic loop (13) is connect by the 8th optical fiber (16) with another input terminal of the 2nd 2X2 coupler (22),
The other end of second fiber optic loop (13) is connect by the 9th optical fiber (17) with another output end of the 2nd 2X2 coupler (22)；
The mass body (11) is slideably positioned in support shaft (20)；
The first faraday fiber reflector (10a) and the 4th faraday's fiber reflector (10d) form one group of reflecting mirror, if
Set the side in mass body (11)；The first faraday fiber reflector (10a) passes through the tenth optical fiber (10) and the first optical fiber
Ring (21) is connected, and the 4th faraday's fiber reflector (10d) passes through the 13rd optical fiber (19) and the first fiber optic loop (21) phase
Even；
The second faraday fiber reflector (10b) and third faraday fiber reflector (10c) form one group of reflecting mirror, if
Set the other side in mass body (11)；The second faraday fiber reflector (10b) passes through the 11st optical fiber (12) and second
Fiber optic loop (13) is connected, and the third faraday fiber reflector (10c) passes through the 12nd optical fiber (18) and the second fiber optic loop
(13) it is connected.
2. differential Michelson fiber optic interferometric as described in claim 1 senses geophone, it is characterised in that: further include not
It becomes rusty steel drum shape shell (9), the inside of the barrel-shaped shell of the stainless steel (9) is vacuum, the support shaft (20), mass body (11), the
One fiber optic loop (21), the second fiber optic loop (13), first faraday's fiber reflector (10a), second faraday's fiber reflector
It is barrel-shaped that (10b), third faraday fiber reflector (10c) and the 4th faraday's fiber reflector (10d) are packaged in stainless steel
In shell (9).
3. differential Michelson fiber optic interferometric as claimed in claim 2 senses geophone, it is characterised in that: described stainless
The both ends of steel drum shape shell (9) are respectively arranged with the first protection sleeve pipe (7) and the second protection sleeve pipe (15), first fiber optic loop
(21) both ends penetrate the first protection sleeve pipe (7), are connected respectively with six fibers (6) and the 7th optical fiber (25)；Described second
The both ends of fiber optic loop (13) penetrate the second protection sleeve pipe (15), are connected respectively with the 8th optical fiber (16) and the 9th optical fiber (17).
4. differential Michelson fiber optic interferometric as claimed in claim 2 senses geophone, it is characterised in that: described stainless
First sensor pedestal (8) and second sensor pedestal (14), and first are respectively arranged on the inside of the both ends of steel drum shape shell (9)
Sensor base (8) is connect by sealant with the first fiber optic loop (21), and second sensor pedestal (14) passes through sealant and the
Two fiber optic loops (13) connection.
5. differential Michelson fiber optic interferometric as described in claim 1 senses geophone, it is characterised in that: the quality
Body (11) is the sphere with center cavity.
6. differential Michelson fiber optic interferometric as described in claim 1 senses geophone, it is characterised in that: described first
Optical fiber (2), the second optical fiber (4), third optical fiber (23), the 4th optical fiber (26), the 5th optical fiber (24), six fibers (6), the 7th light
Fine (25), the 8th optical fiber (16), the 9th optical fiber (17), the tenth optical fiber (10), the 11st optical fiber (12), the 12nd optical fiber (18) and
13rd optical fiber (19) is single mode optical fiber.
7. differential Michelson fiber optic interferometric as described in claim 1 senses geophone, it is characterised in that: the narrow line
Wide laser (1) is used to issue the 40 milliwatt continuous lasers that wavelength is 1550nm.
8. differential Michelson fiber optic interferometric as described in claim 1 senses geophone, it is characterised in that: described second
The inside optical power of optical fiber (4) and third optical fiber (23) is 20 milliwatts.
9. differential Michelson fiber optic interferometric as described in claim 1 senses geophone, it is characterised in that: six fibers
(6) one end of the tenth optical fiber (10) is connected to by the first fiber optic loop (21), the other end of the tenth optical fiber (10) and first farad
Fiber reflector (10a) connection；
7th optical fiber (25) is connected to one end of the 13rd optical fiber (19) by the first fiber optic loop (21), the 13rd optical fiber (19)
The other end is connect with the 4th faraday's fiber reflector (10d).
10. differential Michelson fiber optic interferometric as described in claim 1 senses geophone, it is characterised in that: the 8th light
Fine (16) are connected to one end of the 11st optical fiber (12) by the second fiber optic loop (13), the other end of the 11st optical fiber (12) and the
The connection of two faraday's fiber reflectors (10b)；
9th optical fiber (17) is connected to one end of the 12nd optical fiber (18) by the second fiber optic loop (13), the 12nd optical fiber (18)
The other end is connect with third faraday fiber reflector (10c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821084222.6U CN208367225U (en) | 2018-07-10 | 2018-07-10 | Differential Michelson fiber optic interferometric senses geophone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821084222.6U CN208367225U (en) | 2018-07-10 | 2018-07-10 | Differential Michelson fiber optic interferometric senses geophone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208367225U true CN208367225U (en) | 2019-01-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108646287A (en) * | 2018-07-10 | 2018-10-12 | 湖北文索光电科技有限公司 | Differential Michelson fiber optic interferometric senses geophone |
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| CN108646287A (en) * | 2018-07-10 | 2018-10-12 | 湖北文索光电科技有限公司 | Differential Michelson fiber optic interferometric senses geophone |
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