CN108398242B - The measuring device and method of elliptical polarization holding optical fiber extinction ratio - Google Patents
The measuring device and method of elliptical polarization holding optical fiber extinction ratio Download PDFInfo
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- CN108398242B CN108398242B CN201810097033.0A CN201810097033A CN108398242B CN 108398242 B CN108398242 B CN 108398242B CN 201810097033 A CN201810097033 A CN 201810097033A CN 108398242 B CN108398242 B CN 108398242B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
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Abstract
The invention discloses measuring devices and method that a kind of elliptical polarization keeps optical fiber extinction ratio, including sequentially connected wide spectrum light source, the polarizer, Polarization Controller, elliptical polarization to be measured to keep optical fiber, polarization analysis instrument, fiber adapter and computer.Wide spectrum light source forms the linearly polarized light of High Extinction Ratio through the polarizer, utilize Polarization Controller combination polarization analysis instrument, keep the polarization state of optical fiber light consistent with the eigenstate of polarization of the optical fiber so that being input to elliptical polarization to be measured, then the Stokes' parameter variation in poincare sphere is recorded, the power of the eigenstate of polarization and the variance of another orthogonal to that eigenstate of polarization power are calculated, elliptical polarization to be measured is obtained and keeps extinction ratio of the optical fiber under the length；The decibels for cutting former and later two extinction ratios using cutback technique acquisition are poor, the extinction ratio decibels as this section of optical fiber.The present invention can measure the extinction ratio that elliptical polarization keeps optical fiber, it can also be used to the measurement of conventional polarization maintaining optical fibre extinction ratio.
Description
Technical field
The present invention relates to the measuring devices that technical field of optical fiber more particularly to a kind of elliptical polarization keep optical fiber extinction ratio
And method.
Background technique
Polarization maintaining optical fibre is widely used in the fields such as optical fibre gyro, fibre optic hydrophone, coherent light communication, Fibre Optical Sensor.It is oval
It is a kind of Novel polarization-maintaining optical that polarization state, which keeps optical fiber, it is drawn by controlling the rotation of polarization-preserving fiber preform in wire drawing
It forms, the application demand of circular polarization state retainer member in the fields such as Fibre Optical Sensor can be met, therefore, elliptical polarization keeps optical fiber
It is called high birefringence spin fiber, elliptical polarization is able to maintain and stablizes transmission, be the key that the systems such as optical fiber current mutual inductor
Device.
Polarization extinction ratio (hereinafter referred to as extinction ratio) is one of the important parameter for measuring light polarization, and characterization polarization-maintaining
The important indicator of optical fiber or much polarizing device properties.It therefore, is always that people are concerned about very much to the precise measurement of extinction ratio
The problem of.Traditional definition about extinction ratio is essentially all two orhtogonal linear polarizaiton directions (such as the direction x and the direction y)
The decibels of power ratio.Method based on traditional definition measurement extinction ratio also there are many kinds of, including rotatable polarizer method, Si Tuo
Gram this parametric method, backscattering method, heterodyne interferometry, White Light Interferometer.The above method, will be measured by being all attributed to by two mutually hangs down
The power of straight linearly polarized light.However, elliptical polarization keeps optical fiber different from common polarization maintaining optical fibre, eigenstate of polarization is not
Two orthogonal linear polarizations of x and y, it is two mutually orthogonal ellipses that elliptical polarization, which keeps the eigenstate of polarization of optical fiber,
Polarization state.Therefore, traditional measurement method for extinction ratio is not capable of measuring the extinction ratio that elliptical polarization keeps optical fiber.
Summary of the invention
The present invention provides measuring devices and method that a kind of elliptical polarization keeps optical fiber extinction ratio, to overcome existing disappear
Light ratio measuring method is not suitable for the problem of elliptical polarization keeps optical fiber.
To achieve the goals above, this invention takes following technical solutions.
According to an aspect of the invention, there is provided a kind of elliptical polarization keeps the measuring device of optical fiber extinction ratio, packet
It includes sequentially connected wide spectrum light source, the polarizer, Polarization Controller, elliptical polarization to be measured and keeps optical fiber, polarization analysis instrument, optical fiber
Adapter and computer；
The wide spectrum light source gives the polarizer for generating wide spectrum optical, and by the optical transport；
The polarizer, for linearly polarized light will to be converted to from the light of the wide spectrum light source, and by the linear polarization
Optical transport gives the Polarization Controller；
The Polarization Controller, for will be transformed to and elliptical polarization to be measured from the linearly polarized light of the polarizer
The consistent polarization state of eigenstate of polarization of optical fiber is kept, and is injected into elliptical polarization to be measured and keeps optical fiber；
The polarization analysis instrument keeps the Stokes ginseng of optical fiber output polarization state for recording elliptical polarization to be measured
It counts and is shown in poincare sphere；
The fiber adapter, for realizing elliptical polarization to be measured keep optical fiber cut before with cut after optical fiber connector with
Interface adaptation between polarization analysis instrument；
The computer, the data for being recorded according to polarization analysis instrument calculate elliptical polarization to be measured and keep optical fiber
The decibels for cutting front and back extinction ratio are poor, calculate the elliptical polarization to be measured according to the decibels difference and keep disappearing for optical fiber
Light ratio.
Further, the wide spectrum light source by work in the semiconductor optical amplifier of spontaneous radiation state with work in it is spontaneous
The erbium-doped fiber amplifier of radiation regimes cascades composition.
Further, the polarizer includes the ordinary optic fibre for having self-focusing lens, polarization splitting prism and has certainly
The linear polarization of condenser lens keeps optical fiber.
Further, the Polarization Controller includes manual fiber turns Polarization Controller.
Further, the Polarization Controller includes electronic Polarization Controller.
According to another aspect of the present invention, provide it is a kind of using the measuring device to elliptical polarization keep light
The method that fine extinction ratio measures, comprising:
After the polarizer receives the incidence for the light that wide spectrum light source transmits, linearly polarized light is formed by the polarizer, by institute
It states linearly polarized light and is transferred to the Polarization Controller；
Polarization Controller is adjusted, so that the polarization degree shown in polarization analysis instrument poincare sphere is reached maximum, and make to be injected into
Elliptical polarization to be measured keeps the polarization state of optical fiber to keep the eigenstate of polarization of optical fiber consistent with the elliptical polarization to be measured；
Keep measurement environment constant, the elliptical polarization to be measured keeps this of the output light of optical fiber in record a period of time
Stokes parameter, and elliptical polarization to be measured in this period is calculated according to the Stokes' parameter of record and keeps the defeated of optical fiber
The output average light power P of an eigenstate of polarization of light out0With the output power of another orthogonal eigenstate of polarization
Meansquaredeviationσ；According to formula ER=10lg (P0/ k σ) extinction ratio under the length is calculated, confidence area when wherein k is measurement
Between coefficient；
The decibels for obtaining extinction ratio before and after the elliptical polarization to be measured keeps optical fiber to cut using cutback technique are poor, by this
Decibels difference keeps the extinction ratio of optical fiber as the elliptical polarization to be measured.
Further, it within identical a period of time, adjusts Polarization Controller and elliptical polarization to be measured is made to keep optical fiber
The area that is drawn on polarization analysis instrument of output polarization state reach minimum so that being injected into elliptical polarization to be measured keeps optical fiber
Polarization state keep eigenstate of polarization of optical fiber consistent with the elliptical polarization to be measured.
Further, 95% or more the polarization state quantity of the value covering statistics of the confidence interval coefficient k.
Further, the same light is used when measuring elliptical polarization to be measured and optical fiber being kept to cut forward and backward polarization state
Fine adapter, the fiber adapter are equipped with spring pressuring plate, which only squeezes elliptical polarization to be measured and keep optical fiber
Sheath keep optical fiber without squeezing elliptical polarization to be measured.
Further, it is squeezed in the fiber adapter and increases a card at the sheath that elliptical polarization to be measured keeps optical fiber
Piece makes elliptical polarization to be measured that optical fiber be kept to be not under compression in the space that spring pressuring plate is propped up with card, and loosens institute repeatedly
Spring pressuring plate is stated, observes polarization state variation in poincare sphere, if loosen spring pressuring plate, polarization state does not change, it is determined that described
Spring pressuring plate does not keep optical fiber to cause to squeeze elliptical polarization to be measured.
As can be seen from the technical scheme provided by the above-mentioned embodiment of the present invention, elliptical polarization provided in an embodiment of the present invention
State keeps the measuring device of optical fiber extinction ratio and method not only to can be adapted for the measurement that elliptical polarization keeps state optical fiber extinction ratio,
It is readily applicable to the measurement of conventional polarization maintaining optical fibre extinction ratio.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the structure for the measuring device that a kind of elliptical polarization provided in an embodiment of the present invention keeps optical fiber extinction ratio
Figure, wherein appended drawing reference is explained: 101- wide spectrum light source；The 102- polarizer；103- Polarization Controller；104- elliptical polarization to be measured
Keep optical fiber；105- polarization analysis instrument；
Fig. 2 is a kind of Computing Principle schematic diagram of extinction ratio provided in an embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment 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.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
When part is "connected" or "coupled" to another element, it can be directly connected to or be coupling-connected to other elements, Huo Zheye with optical fiber
There may be intermediary elements.In addition, " connection " used herein or " coupling " may include space optical coupling.It is used herein to arrange
Diction "and/or" includes one or more associated any cells for listing item and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
A kind of elliptical polarization provided in an embodiment of the present invention keeps structure such as Fig. 1 institute of the measuring device of optical fiber extinction ratio
Show, including wide spectrum light source (101), the polarizer (102), Polarization Controller (103), elliptical polarization to be measured holding optical fiber (104),
Polarization analysis instrument (105) and computer (106).Wherein, the output end of the wide spectrum light source (101) connects the polarizer (102)
One end, the polarizer (102) other end are connect with Polarization Controller (103) one end, Polarization Controller (103) other end with it is to be measured ellipse
Circular polarization state keeps one end connection of optical fiber (104), and elliptical polarization to be measured keeps the other end and the polarization analysis of optical fiber (104)
The input terminal of instrument (105) connects, and the polarization analysis instrument (105) records polarization state distributed data in poincare sphere, polarization analysis
The output end of instrument (105) connects computer (106), and the computer (106) calculates elliptical polarization to be measured by computer and protects
Hold the extinction ratio of optical fiber (105).
Fig. 2 is a kind of Computing Principle schematic diagram of extinction ratio provided in an embodiment of the present invention, and the present invention realizes that extinction ratio is surveyed
The principle of amount is as follows:
The traditional definition of one polarised light extinction ratio be two orthogonal linear polarization (direction x and the direction y) power it
The decibels of ratio,
RE=10lg (Px/Py) (1)
When defining the extinction ratio of evaluation optical fiber with this, need to input with a linearly polarized light, and measure this linear polarization
Optical output power PxWith the power Δ P for being coupled to another orthogonal linearly polarized lighty, formula (1) then Ying Gaiwei
RE=10lg (Px/ΔPy) (2)
However this definition still has certain limitation.Firstly, the eigenstate of polarization of tested optical fiber is not necessarily linear polarization
State, it may be the different form such as circularly polarized light, elliptically polarized light, therefore above-mentioned definition is not suitable for elliptical polarization holding
Optical fiber.Secondly as mode coupling occurs at random, so, the Δ P in formula (2)yIt is a random number, long Shi Tongji
Average is zero, therefore should use Δ PyMean square deviation indicate.Third, theoretically, a circular polarization state or elliptical polarization,
The direction x and the direction y can be transformed to by a fixed Polarization Controller, and extinction ratio does not change, so without must
It is however emphasized that must be two linear polarization power ratios.For this purpose, the present invention is by the concept of extinction ratio from " two orhtogonal linear polarizaitons
The decibels that direction " is expanded as " two cross-polarization eigenstates " power ratio.Comprehensively consider above-mentioned factor, the present invention proposes public
Formula (2) is rewritten as
RE=10lg (Pξ/ΔPη) (3)
In formula, PξFor the output power of an eigenstate of polarization of input optical registration, Δ PηTo be coupled to and above-mentioned polarization sheet
Levy the mean square deviation of the output power of another orthogonal eigenstate of polarization of state.
Under this definition, it is important to how to find two orthogonal eigenstate of polarization and their power.
Assuming that an ideal optical system, the polarization state of light source input areOutput polarization state isThen
M is the Muller matrix of the optical system.
Ideally, ifIt is stable with M, thenIt is also stable.Therefore, it is showed in poincare sphere
For a point.The power of another polarization state orthogonal with it is 0, and thus according to above-mentioned definition, extinction ratio is infinity.
Under actual conditions,It is not stable with M.It is influenced by the various factors such as manufacturing defect and inappropriate application, than
If optical source wavelength changes, fibre-optical bending is squeezed, reverses and temperature change etc. influences, and leads to fiber lengths L and refractive index n
Change, cause the variation of M, so as to cause output polarization state variation, shows in poincare sphere it is no longer a point, but one small
Region.At this moment, no matter how we adjust input polarization, and can not also make its concentration is a point, can only collect one
The Stokes' parameter of group distribution:
In formula,It is the Stokes vector of different moments；Respectively 3 basic vectors of Stokes vector；s1
(t),s2(t),s3It (t) is respectively 3 Stokes' parameter amounts of changing with time.
In order to obtain extinction ratio information in this group of random number, firstly, present invention uses wideband light source and the polarizer, with
Just stable input polarization is obtained.Secondly, elliptical polarization to be measured used in the present invention keeps optical fiber, it be by
The rotation that polarization-preserving fiber preform is controlled when wire drawing is drawn, and the ellipse synthesized after its local linear birefringence and rotation is two-fold
Penetrate it is all very high, it is birefringent as caused by various enchancement factors, not only much smaller than this optical fiber local it is birefringent, but also much smaller than rotation
The ellipse birefringence synthesized afterwards, therefore influence of the environment to polarization state can be more effectively resisted than common polarization maintaining optical fibre, significantly
Improve the stability of output polarization state.Therefore, optical fiber theoretically is kept when input polarization is directed at elliptical polarization to be measured
When eigenstate of polarization, neither the ideal point of a concentration, nor that extends endlessly tampers at random, but is presented certain statistics
The random distribution of the regularity of distribution.
The present invention uses
The assembly average for indicating polarization state, in formula, < > indicates average value, it can be being averaged for set
Value, is also possible to the average value for the time.Since the random process is stationary random process, so for the average value of set
Equal to the average value for the time.(6) formula shows the average value for Stokes vector, is equal to each Stokes' parameter
Average value vector sum.
And use variance
The dispersion degree for indicating polarization state distribution, in formula,Indicate the average value for vector modulus value square, i.e., Indicate the modulus value square of vector average value, i.e.,Formula (7) shows polarization state
The variance of distribution is equal to the difference of the average value of vector modulus value square and the modulus value square of vector average value.
It it is easy to show that
In formula,The variance of respectively 3 Stokes' parameters, that is, total variance are equal to each stoke
The sum of this parameter variance.Because being Gaussian Profile for each Stokes' parameter, the amplitude of the vector of synthesis is then max
Wei distribution.
Lead to the variation of polarization state because of mode coupling caused by various defects and interference, assembly average is when long
Zero.Therefore, if constantly regulate input polarization, when being adjusted to the random fluctuation minimum of output polarization state, that is, varianceWhen minimum, Stokes vector can be recognizedCorresponding polarization state
The eigenstate of polarization of optical fiber is kept for elliptical polarization to be measured described under the present situation.Corresponding power P0It is exactly
The power P of the eigenstate of polarizationξ。
The power Δ P of another eigenstate of polarization caused by order to ask because of mode couplingη, referring to fig. 2, it is assumed that statistical average
Polarization state corresponds to O point, and the point of other polarization states will surround O point random distribution, such as Fig. 2 (a).If the centre of sphere of poincare sphere is P, In
The O point of great circle nearby randomly takes a point A, crosses PO and A point and does a great circle, obtains Fig. 2 (b).If PB is PA on PO
Projection, angle θ, then
PB=PAcos θ=cos θ (9)
PB is contribution of the random polarization state A for eigenstate of polarization O point, and OB be exactly because of mode coupling caused by, with partially
The size delta P of another orthogonal eigenstate of polarization of vibration eigenstate O pointη.So average inclined using the meansquaredeviationσ of OB as deviateing
The power variance of polarization state, and enable
Δ P=k σ (10)
The wherein coefficient that k is determined for the requirement according to confidence interval.Substituting into extinction ratio formula (3) can obtain
ER=-10lg (k σ) (11)
The elliptical polarization described in above-mentioned Fig. 1 is kept in the measuring device of optical fiber extinction ratio:
The wide spectrum light source (101) is to be worked in by a semiconductor optical amplifier in spontaneous radiation state with one
The erbium-doped fiber amplifier of spontaneous radiation state cascades composition.
The polarizer (102) has ordinary optic fibre, a polarization splitting prism, a band for self-focusing lens by one
There is the linear polarization of self-focusing lens that optical fiber fabrication is kept to form；Wherein polarization splitting prism is the polarization spectro of a High Extinction Ratio
Prism can form the linearly polarized light of High Extinction Ratio after wide spectrum light source (101) is incident.
The Polarization Controller (103) be one manually fiber turns controller either one by piezoelectric ceramics to light
Fibre is squeezed to change the electric controller of polarization state.
Above-mentioned elliptical polarization keeps the fundamental measurement process of the measuring device of optical fiber extinction ratio to include:
By adjusting Polarization Controller (103), keep the polarization degree shown in polarization analysis instrument (105) poincare sphere maximum, i.e.,
Greater than the polarization degree threshold value of setting, and input polarization and elliptical polarization to be measured is made to keep the polarization sheet of optical fiber (104)
It is consistent to levy state.Specifically, adjusting Polarization Controller within identical a period of time and elliptical polarization to be measured being made to keep optical fiber
The area that is drawn on polarization analysis instrument of output polarization reach minimum, using the averaged SOP on the area as ellipse to be measured
Polarization state keeps an eigenstate of polarization of the output light of optical fiber.
It keeps measurement environment constant, records the polarization state that elliptical polarization to be measured in a period of time keeps the output light of optical fiber
Stokes' parameter in poincare sphere, and thus calculate the output light that elliptical polarization to be measured in this period keeps optical fiber
Eigenstate of polarization optical power P0With the meansquaredeviationσ of the output power of another orthogonal eigenstate of polarization, according to public affairs
Formula ER=10lg (P0/ k σ) calculate extinction ratio under the length, the coefficient that wherein k is determined for the requirement according to confidence interval.
It is found out respectively using cutback technique and cuts the extinction ratio that forward and backward elliptical polarization to be measured keeps optical fiber (104), two disappear
The decibels of light ratio are poor, which is the extinction ratio decibels that this section of elliptical polarization to be measured keeps optical fiber (104).Its
In for the variation that avoids elliptical polarization to be measured that optical fiber 104 is kept to cut front and back with 105 jointing of polarization analysis instrument, to arrive
Measurement result accuracy is influenced, elliptical polarization to be measured is all made of same with polarization analysis instrument 105 before and after keeping optical fiber 104 to cut
Fiber adapter connection.In the selection of adapter, select a kind of jacket portions for only squeezing optical fiber using spring without squeezing
A kind of adapter of bare fibre, and should ensure that the fiber adapter is applied to the elliptical polarization to be measured and keeps on optical fiber
Pressure very little does not influence the output polarization state that elliptical polarization to be measured keeps optical fiber.
When using fiber adapter installation optical fiber, the reduction keeps optical fiber pressure for elliptical polarization to be measured
Method are as follows: at the extruding point of the fixed optical fiber of adapter, increase a thin card, make optical fiber be in spring pressuring plate and propped up with card
Space in, be not under compression, and loosen spring pressuring plate repeatedly, observe poincare sphere on polarization state variation, if loosen reed,
Polarization state does not change, and illustrates that spring pressuring plate does not keep optical fiber to cause to squeeze elliptical polarization to be measured.
In conclusion measuring device and method that elliptical polarization provided in an embodiment of the present invention keeps optical fiber extinction ratio are not
It only can be adapted for the measurement that elliptical polarization keeps state optical fiber extinction ratio, be readily applicable to the survey of conventional polarization maintaining optical fibre extinction ratio
Amount.
Those of ordinary skill in the art will appreciate that: attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (10)
1. the measuring device that a kind of elliptical polarization keeps optical fiber extinction ratio, which is characterized in that including sequentially connected wide spectrum optical
Source, the polarizer, Polarization Controller, elliptical polarization to be measured keep optical fiber, polarization analysis instrument, fiber adapter and computer；
The wide spectrum light source gives the polarizer for generating wide spectrum optical, and by the optical transport；
The polarizer for will be converted to linearly polarized light from the light of the wide spectrum light source, and the linearly polarized light is passed
It is defeated by the Polarization Controller；
The Polarization Controller, for that will be transformed to keep with elliptical polarization to be measured from the linearly polarized light of the polarizer
The consistent polarization state of the eigenstate of polarization of optical fiber, and be injected into elliptical polarization to be measured and keep optical fiber；
The polarization analysis instrument keeps the Stokes' parameter of optical fiber output polarization state simultaneously for recording elliptical polarization to be measured
It is shown in poincare sphere；
The fiber adapter, optical fiber connector and polarization after keeping optical fiber to cut preceding and cutting for realizing elliptical polarization to be measured
Interface adaptation between analyzer；
The computer, the data for being recorded according to polarization analysis instrument calculate elliptical polarization to be measured and optical fiber are kept to cut
The decibels of front and back extinction ratio are poor, calculate the delustring that the elliptical polarization to be measured keeps optical fiber according to the decibels difference
Than.
2. the measuring device that elliptical polarization according to claim 1 keeps optical fiber extinction ratio, which is characterized in that the wide range
Light source is by working in the semiconductor optical amplifier of spontaneous radiation state and working in the erbium-doped fiber amplifier of spontaneous radiation state
Cascade composition.
3. the measuring device that elliptical polarization according to claim 1 keeps optical fiber extinction ratio, which is characterized in that described to be polarized
Device includes that ordinary optic fibre, polarization splitting prism and the linear polarization with self-focusing lens with self-focusing lens keep optical fiber.
4. keeping the measuring device of optical fiber extinction ratio by elliptical polarization described in claims 1 or 2 or 3, which is characterized in that institute
Stating Polarization Controller includes manual fiber turns Polarization Controller.
5. keeping the measuring device of optical fiber extinction ratio by elliptical polarization described in claims 1 or 2 or 3, which is characterized in that institute
Stating Polarization Controller includes electronic Polarization Controller.
6. a kind of extinction ratio for keeping optical fiber to elliptical polarization using measuring device described in claim 1 to 5 any one
The method measured characterized by comprising
After the polarizer receives the incidence for the light that wide spectrum light source transmits, linearly polarized light is formed by the polarizer, by the line
Polarised light is transferred to the Polarization Controller；
Polarization Controller is adjusted, so that the polarization degree shown in polarization analysis instrument poincare sphere is reached maximum, and make to be injected into be measured
Elliptical polarization keeps the polarization state of optical fiber to keep the eigenstate of polarization of optical fiber consistent with the elliptical polarization to be measured；
It keeps measurement environment constant, records the stoke that the elliptical polarization to be measured in a period of time keeps the output light of optical fiber
This parameter, and the output light that elliptical polarization to be measured in this period keeps optical fiber is calculated according to the Stokes' parameter of record
An eigenstate of polarization output average light power P0It is equal with the output power of another orthogonal eigenstate of polarization
Variances sigma；According to formula ER=10lg (P0/ k σ) extinction ratio under the length is calculated, confidence interval system when wherein k is measurement
Number；
The decibels for obtaining extinction ratio before and after the elliptical polarization to be measured keeps optical fiber to cut using cutback technique are poor, by the decibel
Number difference keeps the extinction ratio of optical fiber as the elliptical polarization to be measured.
7. according to the method for claim 6, which is characterized in that within identical a period of time, adjusting Polarization Controller makes
It obtains the area that elliptical polarization to be measured keeps the output polarization state of optical fiber to draw on polarization analysis instrument and reaches minimum, so that injection
The polarization state of optical fiber is kept to keep the eigenstate of polarization of optical fiber consistent with the elliptical polarization to be measured to elliptical polarization to be measured.
8. according to the method for claim 6, which is characterized in that the value covering of the confidence interval coefficient k counts inclined
95% or more polarization state quantity.
9. method according to claim 6, which is characterized in that keep optical fiber cutting forward and backward measuring elliptical polarization to be measured
Polarization state when use the same fiber adapter, the fiber adapter is equipped with spring pressuring plate, which only squeezes
Elliptical polarization to be measured keeps the sheath of optical fiber to keep optical fiber without squeezing elliptical polarization to be measured.
10. method according to claim 9, which is characterized in that squeeze elliptical polarization to be measured in the fiber adapter and protect
One card of increase at the sheath of optical fiber is held, elliptical polarization to be measured is made to keep optical fiber in the space that spring pressuring plate and card are propped up
It is inside not under compression, and loosens the spring pressuring plate repeatedly, observe polarization state variation in poincare sphere, if loosen spring pressuring plate,
Polarization state does not change, it is determined that the spring pressuring plate does not keep optical fiber to cause to squeeze elliptical polarization to be measured.
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| CN109781386A (en) * | 2019-01-16 | 2019-05-21 | 深圳太辰光通信股份有限公司 | A kind of polarised light extinction ratio test device of magneto-optic optical fiber |
| CN110849394A (en) * | 2019-11-19 | 2020-02-28 | 中国船舶重工集团公司第七0七研究所 | Quantitative evaluation method for light polarization state change of nuclear magnetic resonance gyroscope |
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| CN117740337A (en) * | 2023-12-29 | 2024-03-22 | 上海傲世控制科技股份有限公司 | Polarization-maintaining tail fiber extinction ratio rapid detection system and method |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06317498A (en) * | 1993-05-07 | 1994-11-15 | Nec Corp | Extinction ratio measuring method in assembling process of polarization maintaining fiber and semiconductor laser |
| JP2004226209A (en) * | 2003-01-22 | 2004-08-12 | Optoquest Co Ltd | Method of measuring polarized light extinction ratio or the like and system for measuring polarized light extinction ratio or the like using the same |
| CN2911623Y (en) * | 2006-03-17 | 2007-06-13 | 北京高光科技有限公司 | Measurer for extinctivity and related parameters |
| CN101236127A (en) * | 2007-09-28 | 2008-08-06 | 中国兵器工业第二○五研究所 | Polarization maintaining fiber beat length measuring apparatus |
| CN101672696A (en) * | 2009-09-14 | 2010-03-17 | 清华大学 | Light polarization detection instrument |
| CN101979985A (en) * | 2010-05-26 | 2011-02-23 | 上海大学 | Device for testing extinction ratio of polarization maintaining fiber |
| CN102183360A (en) * | 2011-03-04 | 2011-09-14 | 天津大学 | Method and device for detecting polarization extinction ratio of optical polarizer |
| CN102706538A (en) * | 2012-05-29 | 2012-10-03 | 天津大学 | Polarization maintaining optical fiber extinction-ratio self-adaptive demodulation method |
| CN102928204A (en) * | 2012-11-07 | 2013-02-13 | 中国计量科学研究院 | Optical fiber polarization extinction ratio standard device |
| CN102954869A (en) * | 2012-07-04 | 2013-03-06 | 中国电子科技集团公司第四十一研究所 | High extinction ratio calibrating device and high extinction ratio calibrating method of polarization-maintaining optical fiber |
| CN103363905A (en) * | 2013-07-02 | 2013-10-23 | 北京航空航天大学 | Polarization-maintaining optical fiber length measuring system and polarization-maintaining optical fiber length measuring method based on spectrum analysis |
| CN103698015A (en) * | 2014-01-06 | 2014-04-02 | 清华大学深圳研究生院 | Polarization detector and polarization detecting method |
| CN103900680A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Device and detecting method for restraining polarization crosstalk measuring noise by the adoption of light source |
| CN104897368A (en) * | 2015-05-05 | 2015-09-09 | 上海大学 | Real-time polarization maintaining fiber extinction ratio testing device |
| CN106989904A (en) * | 2017-04-25 | 2017-07-28 | 哈尔滨工程大学 | A kind of measuring method of polarization maintaining optical fibre extinction ratio |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013020121A1 (en) * | 2011-08-04 | 2013-02-07 | Ofs Fitel, Llc | In-line arrangement for measuring polarization extinction ratio |
-
2018
- 2018-01-31 CN CN201810097033.0A patent/CN108398242B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06317498A (en) * | 1993-05-07 | 1994-11-15 | Nec Corp | Extinction ratio measuring method in assembling process of polarization maintaining fiber and semiconductor laser |
| JP2004226209A (en) * | 2003-01-22 | 2004-08-12 | Optoquest Co Ltd | Method of measuring polarized light extinction ratio or the like and system for measuring polarized light extinction ratio or the like using the same |
| CN2911623Y (en) * | 2006-03-17 | 2007-06-13 | 北京高光科技有限公司 | Measurer for extinctivity and related parameters |
| CN101236127A (en) * | 2007-09-28 | 2008-08-06 | 中国兵器工业第二○五研究所 | Polarization maintaining fiber beat length measuring apparatus |
| CN101672696A (en) * | 2009-09-14 | 2010-03-17 | 清华大学 | Light polarization detection instrument |
| CN101979985A (en) * | 2010-05-26 | 2011-02-23 | 上海大学 | Device for testing extinction ratio of polarization maintaining fiber |
| CN102183360A (en) * | 2011-03-04 | 2011-09-14 | 天津大学 | Method and device for detecting polarization extinction ratio of optical polarizer |
| CN102706538A (en) * | 2012-05-29 | 2012-10-03 | 天津大学 | Polarization maintaining optical fiber extinction-ratio self-adaptive demodulation method |
| CN102954869A (en) * | 2012-07-04 | 2013-03-06 | 中国电子科技集团公司第四十一研究所 | High extinction ratio calibrating device and high extinction ratio calibrating method of polarization-maintaining optical fiber |
| CN102928204A (en) * | 2012-11-07 | 2013-02-13 | 中国计量科学研究院 | Optical fiber polarization extinction ratio standard device |
| CN103363905A (en) * | 2013-07-02 | 2013-10-23 | 北京航空航天大学 | Polarization-maintaining optical fiber length measuring system and polarization-maintaining optical fiber length measuring method based on spectrum analysis |
| CN103698015A (en) * | 2014-01-06 | 2014-04-02 | 清华大学深圳研究生院 | Polarization detector and polarization detecting method |
| CN103900680A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Device and detecting method for restraining polarization crosstalk measuring noise by the adoption of light source |
| CN104897368A (en) * | 2015-05-05 | 2015-09-09 | 上海大学 | Real-time polarization maintaining fiber extinction ratio testing device |
| CN106989904A (en) * | 2017-04-25 | 2017-07-28 | 哈尔滨工程大学 | A kind of measuring method of polarization maintaining optical fibre extinction ratio |
Non-Patent Citations (1)
| Title |
|---|
| 光纤通信中偏振光消光比测量方法的研究;赵素英 等;《红外》;20070930;第28卷(第9期);第25-28、46页 * |
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