CN106526903A - Polarization controller - Google Patents
Polarization controller Download PDFInfo
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- CN106526903A CN106526903A CN201611101078.8A CN201611101078A CN106526903A CN 106526903 A CN106526903 A CN 106526903A CN 201611101078 A CN201611101078 A CN 201611101078A CN 106526903 A CN106526903 A CN 106526903A
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- polarization controller
- fiber optic
- optic coils
- polarization
- piezoelectric ceramics
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0136—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention provides a polarization controller, and belongs to the technical field of optoelectronics. The polarization controller comprises an optical fiber coil wound on the outer wall of a cylindrical piezoelectric ceramic element, and the optical fiber coil is a [lambda]/4 optical fiber coil. The optical fiber coil is used for converting an incident first light beam into a second light beam for output, and the cylindrical piezoelectric ceramic element is used for adjusting the polarization state of the second light beam under the control of the impressed voltage. Compared with the prior art, the polarization controller is advantaged in that the control precision of the polarization state is effectively improved.
Description
Technical field
The present invention relates to photoelectron technical field, in particular to a kind of Polarization Controller.
Background technology
Under normal circumstances, due to the factor such as scrambling of thermal stress, mechanical stress and fibre core cause it is irregular two-fold
The impact of effect is penetrated, the polarization state of the line polarized light transmitted in optical fiber will be constantly converted with transmission range, the light of final output
It may be partial polarized light.For the ease of the further process of follow-up optic-fiber monitoring system such as distributed fiber-optic sensor system,
Need for the partial polarized light of optical fiber output to be converted to line polarized light.Existing Polarization Controller is mostly using the double of quarter wave plate
Refraction effect realizes the conversion between line polarized light, circularly polarized light and elliptically polarized light and line polarized light.In order to realize system
All-fiber, further using the fiber optic coils equivalent with quarter wave plate.However, as processing technology and encapsulation are to optical fiber cable
The impact of each parameter especially bending radius of circle, causes the polarization beat length precision of fiber optic coils relatively low.
The content of the invention
In view of this, it is an object of the invention to provide a kind of Polarization Controller, can effectively improve polarization beat length
Precision.
To achieve these goals, the technical solution used in the present invention is as follows：
A kind of Polarization Controller is embodiments provided, including the optical fiber cable of the outer wall for being wound in tubular piezoelectric ceramics
Circle, the fiber optic coils are λ/4 fiber optic coils.The fiber optic coils are for defeated for the second light beam by the first incident Beam Transformation
Go out, the tubular piezoelectric ceramics is used under alive control outside the polarization state for adjusting second light beam.
In preferred embodiments of the present invention, above-mentioned Polarization Controller also includes voltage output device, the tubular piezoelectricity
Ceramic to electrically connect with the voltage output device, the voltage output device is used to export the applied voltage.
In preferred embodiments of the present invention, above-mentioned Polarization Controller also includes the first housing, described to be wound in tubular pressure
The fiber optic coils of the outer wall of electroceramics are packaged in the first shell body.
In preferred embodiments of the present invention, epoxy resin in said first shell, is filled with, the epoxy resin is used for
The fiber optic coils of the outer wall for being wound in tubular piezoelectric ceramics are packaged in the first shell body.
In preferred embodiments of the present invention, above-mentioned Polarization Controller also includes motor and power transmission shaft, and the motor turns
Axle is connected with the power transmission shaft, and the motor is by the power transmission shaft and the rotation connector for being arranged at first housing bottom
Connection, the motor are electrically connected with the voltage output device.The motor is default for driving the fiber optic coils to turn to
Position is so that the second light beam that the first incident Beam Transformation is default polarization direction is exported by the fiber optic coils.
In preferred embodiments of the present invention, above-mentioned motor is motor.
In preferred embodiments of the present invention, above-mentioned Polarization Controller also includes the second housing, is packaged with described being wound in
First housing of the fiber optic coils of the outer wall of tubular piezoelectric ceramics is arranged in the second shell body.Second housing sets
The first opening, the second opening and the 3rd opening are equipped with, described first is open for penetrating the power transmission shaft, and second opening is used
Enter line in the coil for passing the fiber optic coils, the described 3rd is open for passing the coil outlet of the fiber optic coils.
In preferred embodiments of the present invention, above-mentioned coil enters line and is fixed on by the first fixture to be arranged on described second
Coil Ru Xian bearings in housing, above-mentioned coil outlet are fixed on by the second fixture and are arranged in the second shell body
Coil outlet bearing.
In preferred embodiments of the present invention, above-mentioned Polarization Controller also includes first port, second port, the 3rd port
With the 4th port, the first port is optical coupled with the input of the fiber optic coils, the second port and the optical fiber
The outfan of coil is optical coupled, and the 3rd port is electrically connected with the positive pole of the tubular piezoelectric ceramics, the 4th port
Electrically connect with the negative pole of the tubular piezoelectric ceramics.
In preferred embodiments of the present invention, above-mentioned optical fiber is single mode resist bending optical fiber.
Compared to prior art, optical fiber is wound in tubular piezoelectric ceramics by Polarization Controller provided in an embodiment of the present invention
Outer wall make λ/4 fiber optic coils, λ/4 fiber optic coils can be equivalent to quarter-wave plate, by controlling the outer of piezoelectric ceramics
Making alive adjusts the parameter of fiber optic coils, so as to further adjust the polarization state of the second light beam of fiber optic coils output, effectively
Improve polarization beat length precision.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below by to be used attached needed for embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, thus be not construed as it is right
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 shows a kind of structural representation of Polarization Controller provided in an embodiment of the present invention；
Fig. 2 shows structural representation of the first housing of Polarization Controller provided in an embodiment of the present invention under the first visual angle
Figure；
Fig. 3 shows structural representation of the first housing of Polarization Controller provided in an embodiment of the present invention under the second visual angle
Figure；
Fig. 4 shows another kind of structural representation of Polarization Controller provided in an embodiment of the present invention；
Fig. 5 shows the structural representation of the second housing in Fig. 4 under the second visual angle；
Fig. 6 shows a kind of structured flowchart of application scenarios of Polarization Controller provided in an embodiment of the present invention.
In figure：10- Polarization Controllers；101- piezoelectric ceramics；102- fiber optic coils；102a- inputs；102b- outfans；
103- voltage output devices；The first housings of 104-；105- rotates connector；106- coil entrances；107- coils are exported；108- is electric
Machine；109- power transmission shafts；The second housings of 110-；111- coils enter line；112- coil outlets；113- coil Ru Xian bearings；114-
Coil outlet bearing；115- first is open；116- second is open；117- the 3rd is open；118- first ports；The second ends of 119-
Mouthful；The 3rd ports of 120-；The 4th ports of 121-；The first Polarization Controllers of 11-；The second Polarization Controllers of 12-.
Specific embodiment
Existing optical fiber polarization controller is mostly manual optical fiber polarization controller, and optical fiber is looped around shape successively on bobbin
Into fiber optic coils, fiber optic coils are enabled to be equivalent to quarter-wave plate by the number of turn for controlling fiber optic coils, it is ellipse to realize
Conversion between circularly polarized light or circularly polarized light and line polarized light.And further manually adjust the coil plane of fiber optic coils
Yawing moment, control optical fiber polarization controller output beam polarization direction.However, as processing technology and encapsulation are to light
The impact of each parameter of fine coil especially bending radius, causes the polarization beat length precision of fiber optic coils relatively low.
In consideration of it, a kind of Polarization Controller is embodiments provided, effectively to improve the inclined of existing fiber coil
The relatively low problem of polarization state control accuracy.
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be arranged and be designed with a variety of configurations herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
It should be noted that：Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then in subsequent accompanying drawing which further need not be defined and is explained.
In describing the invention, it should be noted that term " on ", D score, "left", "right", " vertical ", " interior ",
The orientation or position relationship of the instruction such as " outward " is that, based on orientation shown in the drawings or position relationship, or the invention product is used
When the orientation usually put or position relationship, be for only for ease of the description present invention and simplify description, rather than indicate or imply
The device or element of indication must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The restriction of invention.Additionally, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relative
Importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" connection ", " electrical connection ", " optical coupled " should be interpreted broadly, for example, it may be being directly connected to or coupling, it is also possible to by
Between medium be indirectly connected with or couple, can be the connection of two element internals.For the ordinary skill in the art, may be used
Above-mentioned term concrete meaning in the present invention is understood with concrete condition.
As described in Figure 1, Polarization Controller provided in an embodiment of the present invention 10 includes being wound in the outer of tubular piezoelectric ceramics 101
The fiber optic coils 102 of wall.
Wherein, the winding number of turn of the radius of curvature R (m, N) of fiber optic coils 102 and optical fiber, partial wave coefficient relational expression such as
Under：
In formula (1), a is constant, for example, for silicon dioxide makees the single-mode fiber of fibre core and covering, a=0.133；R is
The radius of optical fiber；N is the winding number of turn；M is partial wave coefficient.
In the present embodiment, fiber optic coils 102 are λ/4 fiber optic coils, can be equivalent to quarter-wave plate.Specifically, select
Determine the tubular piezoelectric ceramics 101 that radius is R, for λ/4 fiber optic coils, m=4, the corresponding winding number of turn is calculated according to formula (1)
N.Optical fiber in fiber optic coils 102 preferably adopts single mode resist bending optical fiber.By single mode resist bending optical fiber in tubular piezoelectric ceramics 101
Outer wall according to circumferential direction the coiling N circles on 101 outer wall of piezoelectric ceramics, using fibre-optical bending cause in cross section of optic fibre should
Power has anisotropic distribution, due to photoelastic effect, makes fiber optic materials index distribution change, additional so as to produce
Stress birfringence, causes the change of guided wave polarization state, to realize the control to polarization state.λ/4 fiber optic coils can realize ellipse
Conversion between polarized light or circularly polarized light and line polarized light.For example, when incident beam is elliptical polarization light, λ/4 optical fiber cable
Circle being capable of polarization light output.
Therefore, when the first light beam enters fiber optic coils by the input 102a of fiber optic coils 102, in fiber optic coils 102
Transmission, due to being acted on by the stress birfringence effect in fiber optic coils 102, the first Beam Transformation is the second light beam by optical fiber
The outfan 102b outputs of coil 102.In theory, for λ/4 fiber optic coils, when the first light beam is elliptical polarization light, second
Light beam is line polarized light.But, on the one hand, when the first light beam is not the elliptically polarized light of standard, but during partial polarization light,
Existing λ/4 fiber optic coils cannot obtain accurate line polarized light；On the other hand, as processing technology and encapsulation are to optical fiber
The impact of each parameter of coil 102 especially bending radius, causes the radius of curvature R of fiber optic coils 102 inaccurate, have impact on light
The linear polarization output of fine coil 102.Therefore, in order to export accurate line polarized light, need further to fiber optic coils 102
Parameter be finely adjusted.
In the embodiment of the present invention, λ/4 fiber optic coils are wound in the outer wall of tubular piezoelectric ceramics 101, due to piezoelectric ceramics 101
With electromagnetism flex effect, can cause when the positive pole (+) and negative pole (-) of piezoelectric ceramics 101 are powered and be wrapped in piezoelectric ceramics
The parameters such as the length of the single mode resist bending optical fiber of 101 outer walls, bending radius change, and can by extrude optical fiber produce it is attached
Plus stress birfringence effect.Therefore, tubular piezoelectric ceramics 101 can be used in adjusting the second light beam under alive control outside
Polarization state, i.e., the parameter of fiber optic coils 102 is finely adjusted by controlling the voltage value that is applied on piezoelectric ceramics 101,
So as to realize the polarization beat length of fiber optic coils 102.Now, can adjust and be applied to piezoelectric ceramics 101 according to the needs of user
On voltage value, it is ensured that the second light beam be line polarized light.
Therefore, the use of Polarization Controller provided in an embodiment of the present invention 10 for convenience, as shown in figure 1, the polarization control
Device processed 10 also includes voltage output device 103, and tubular piezoelectric ceramics 101 is electrically connected with voltage output device 103.Voltage output is filled
103 are put for applied voltage being exported to piezoelectric ceramics 101, so that piezoelectric ceramics 101 produces electricity in the presence of outer making alive
Magnetic flex effect adjusts the parameters such as the length of fiber optic coils, bending radius, so as to adjust the polarization state of the second light beam.It is concrete additional
The polarization state of the second light beam that the size of magnitude of voltage can be exported in real time according to fiber optic coils 102 is adjusted, this feedback regulation side
Formula can effectively ensure the polarization beat length precision of this Polarization Controller 10.In the present embodiment, voltage output device 103 can be with
For the adjustable power module of output voltage values.
Further, as shown in Fig. 2 Polarization Controller provided in an embodiment of the present invention 10 also includes the first housing 104, around
The fiber optic coils 102 for being formed on the outer wall of tubular piezoelectric ceramics 101 are packaged in the first housing 104.Fig. 2 shows Polarization Controller
The front view of 10 the first housing 104, Fig. 3 show the left view of Fig. 2.Specifically, the fiber optic coils 102 after finish winding
It is placed in the first housing 104, as shown in figure 3, the first housing 104 is provided with coil entrance 106 and coil outlet 107, by light
The coil of fine coil 102 enters line 111 and passes coil entrance 106, and the coil outlet 112 of fiber optic coils 102 is passed coil outlet
107.Wherein, coil enter line 111 include single mode resist bending optical fiber enter line and the anelectrode of piezoelectric ceramics 101 enters line, coil goes out
Line 112 includes the outlet of single mode resist bending optical fiber and the negative electrode outlet of piezoelectric ceramics 101.Epoxide-resin glue is circulated into into first
In housing 104, so as to the fiber optic coils 102 of the outer wall by tubular piezoelectric ceramics 101 is wound in are encapsulated in the first housing 104.
First housing 104 can play sound insulation, vibration isolation, fixing function.
Further, in order to more accurately adjust the polarization direction of the second light beam of the output of fiber optic coils 102, such as Fig. 4 institutes
Show, Polarization Controller provided in an embodiment of the present invention 10 also includes motor 108 and power transmission shaft 109, and the bottom of the first housing 104 sets
It is equipped with rotation connector 105.The rotating shaft of motor 108 is connected with power transmission shaft 109, motor 108 by power transmission shaft 109 be arranged at the
The rotation connector 105 of one housing, 104 bottom connects, and motor is electrically connected with voltage output device 103.Now, by controlling electricity
The rotating shaft of the output voltage real-time control motor 108 of pressure output device 103 is rotated along ω directions and can control fiber optic coils
102 deflection angle, so as to control the polarization direction of the second light beam of the output of fiber optic coils 102, to obtain required for user
Polarization direction, is effectively improved the control accuracy of the polarization direction to the second light beam.In the present embodiment, motor 108 can be
Motor.
Fiber optic coils 102 are λ/4 fiber optic coils, and when the second light beam is line polarized light, coil plane turns over α, linear polarization
The direction of light is turned over shown in the relation such as formula (2) of β, α and β.
β=4 (1-t) α (2)
In formula (2), t is the constant for reflecting fiber optic materials characteristic, for all doping silicon dioxides, t=0.08.Such as Fig. 4
It is shown, during first predetermined angle of axis of rotation of motor 108, drive power transmission shaft 109 to rotate along ω directions, and then drive optical fiber cable
Circle 102 rotates the second predetermined angle along ω directions, so that the coil plane of fiber optic coils 102 as shown in Figure 4 initial
Position turns to predeterminated position, realizes the line polarized light output of default polarization direction.Above-mentioned default polarization direction is user institute
The polarization direction of needs.Wherein, the second predetermined angle is arranged according to above-mentioned default polarization direction, and the first predetermined angle is according to motor
Gear ratio between 108 rotating shaft and λ/4 fiber optic coils is arranged.
Further, as shown in figure 4, Polarization Controller provided in an embodiment of the present invention 10 also includes the second housing 110.On
State and be packaged with the first housing 104 of the fiber optic coils 102 for being wound in 101 outer wall of tubular piezoelectric ceramics and be arranged on the second housing 110
It is interior.Second housing 110 has the function of isolation sound, can be effectively prevented from external sound signal to the inclined of fiber optic coils 102
The interference of polarization state modulation.It should be noted that front views of the Fig. 4 for Polarization Controller 10, Fig. 5 is the second shell shown in Fig. 4
The left view of body 110.In order to pass through power transmission shaft 109, coil to enter line 111 and coil outlet 112, as shown in figure 5, the second housing
110 are provided with first opening the 115, second opening 116 and the 3rd opening 117.Wherein, the first opening 115 is used to penetrate power transmission shaft
109, the second opening 116 is used to pass the coil of fiber optic coils 102 and enters line 111, and the 3rd opening 117 is used to pass fiber optic coils
102 coil outlet 112.It should be noted that isolating to the sound of the second housing 110 to reduce above three opening as far as possible
The impact of function, the aperture area of the first opening 115 should be adapted to the cross-sectional area of power transmission shaft 109, the opening of the second opening 116
The cross-sectional area that area should enter line 111 with coil is adapted to, and the aperture area of the 3rd opening 117 should be transversal with coil outlet 112
Area is adapted to.
In order to avoid coil enters line 111 and the generation play of coil outlet 112, the parameter of fiber optic coils is affected, so as to affect
The polarization beat length precision of Polarization Controller 10, as shown in figure 4, coil is entered line 111 is fixed on second by the first fixture
Coil Ru Xian bearings 113 in housing 110, coil outlet 112 is fixed in the second housing 110 by the second fixture
Coil outlet bearing 114.For example, the first fixture and the second fixture can be epoxide-resin glue, will coil enter line
111 and coil outlet 112 ensphere line bearing 113 and coil outlet bearing 114 online using epoxide-resin glue solid point respectively.
Or, the first fixture and the second fixture can also be solidus terminal or viscose glue.
Input and the output of the second light beam and the applied voltage of piezoelectric ceramics 101 for the ease of the first light beam is applied
Plus, Polarization Controller provided in an embodiment of the present invention 10 can also include first port 118, second port 119, the 3rd port
120 and the 4th port 121.Wherein, the input 102a of first port 118 and fiber optic coils is that the optical fiber of fiber optic coils 102 enters
Line optics is coupled, and second port 119 and the outfan 102b of fiber optic coils are that the optical fiber outlet of fiber optic coils 102 is optical coupled,
3rd port 120 is electrically connected with the positive pole of tubular piezoelectric ceramics 101, the negative electricity of the 4th port 121 and tubular piezoelectric ceramics 101
Connection.Now, first port 118 and the 3rd port 120 can be arranged at the second opening 116 of the second housing 110, it is also possible to
The optical fiber for being correspondingly arranged in fiber optic coils 102 respectively enters line and the anelectrode of piezoelectric ceramics 101 enters at line, as shown in Figure 4.Second
The set-up mode of port 119 and the 4th port 121 is similar with first port 118 and the 3rd port 120, and here is omitted.
During use, the first light beam is by 118 input optical fibre coil 102 of first port, second exported according to second port 119
The real-time polarization state of light beam, adjusts the magnitude of voltage that voltage output device 103 is applied to the first voltage of piezoelectric ceramics 101, utilizes
The electromagnetism flex effect that piezoelectric ceramics 101 has, is finely adjusted to 102 parameter of fiber optic coils, defeated so as to realize fiber optic coils 102
The polarization beat length of the second light beam for going out.Additionally, the real-time polarization direction of the second light beam according to the output of second port 119, adjusts
Economize on electricity pressure output device 103 is applied to the magnitude of voltage of the second voltage of motor 108, controls the deflection of the coil plane of fiber optic coils
Angle, so as to control the polarization direction of the second light beam.
For example, Polarization Controller provided in an embodiment of the present invention 10 can be used in the concrete application scene described in Fig. 6.Fig. 6
Show a kind of distributed fiber-optic sensor monitoring system.As shown in fig. 6, the laser of super-narrow line width laser instrument output enters into acousto-optic
Continuous laser is modulated into pulse for τ through acousto-optic modulator by manipulator, pulse laser of the cycle for T, pulse laser according to
It is secondary to form flashlight after the first optical filter of the first image intensifer and super-narrow line width.Flashlight enters first annular device
C11 ends, through first annular device C13 ends injection length for Y sensor fibre.Transducing signal is carried dorsad in sensor fibre
Rayleigh scattering light returns to the C13 ends of first annular device, and the C12 ends output of the first annular devices of Jing sequentially passes through the second light amplification
Device, the second optical filter of super-narrow line width enter the E31 ends of beam splitter.The beam splitting of Jing beam splitters is the first signal beams and second
Signal beams, the first signal beams enter into the first Polarization Controller 11 by the first beam splitting end E32 ends output of beam splitter
Q11 ends, secondary signal light beam are entered into the Q21 of the second Polarization Controller 12 by the second beam splitting end E33 outputs with beam splitter
End.
Wherein, back rayleigh scattering light is approximately elliptically polarized light, and the first Polarization Controller 11 is for by the first flashlight
Beam is processed as the first line polarized light.Second Polarization Controller 12 for by secondary signal beam treatment be the second line polarized light, and
The polarization direction of the polarization direction of the first line polarized light and the second line polarized light is mutually orthogonal.First Polarization Controller 11 and second
Polarization Controller 12 adopts Polarization Controller provided in an embodiment of the present invention 10.
First line polarized light the C21 ends of the second circulators of Jing and the C23 successively of the Q12 ends output of the first Polarization Controller 11
End, enters into the B11 ends of the one 3 × 3rd bonder 611, through the one 3 × 3rd bonder beam splitting, from the one 3 × 3rd bonder
The light of B14 ends output enters into first faraday rotation mirror for the optical fiber of L1 through length, from the B15 ends of the one 3 × 3rd bonder
The light of output enters into second faraday rotation mirror for the optical fiber of L2 through length, wherein, L1-L2=S.Two-beam difference Jing the
One faraday rotation mirror and the reflection of the second faraday rotation mirror are returned to and interfere at the one 3 × 3rd bonder that to form first dry
Relate to signal.First interference signal is divided into three-beam, and it is annular that light beam enters into second through the B11 ends of the one 3 × 3rd bonder
The C22 ends of the second circulator of the C23 of device, Jing enter into the P11 ends of the first polarization beam combiner, and the second beam light Jing the one 3 × 3rd is coupled
The B12 ends of device enter into the P21 ends of the second polarization beam combiner, and the B13 ends of the one 3 × 3rd bonders of three-beam Jing enter into
The P31 ends of three polarization beam combiners.
Second line polarized light the C31 ends of the 3rd circulators of Jing and the C33 successively of the Q22 ends output of the second Polarization Controller 12
End enters into the B21 ends of the 23 × 3rd bonder, through the 23 × 3rd bonder beam splitting, defeated from the 23 × 3rd bonder B24 ends
The light for going out enters into threeth faraday rotation mirror for the optical fiber of L1 through length, from the light of the 23 × 3rd bonder B25 ends output
Fourth faraday rotation mirror is entered into for the optical fiber of L2 through length, wherein, L1-L2=S, two-beam difference the 3rd faraday of Jing
Revolving mirror and the reflection of the 4th faraday rotation mirror return to and interfere to form the second interference signal at the 23 × 3rd bonder.The
Two interference signals are also classified into three-beam, and light beam is exported to the C33 of the 3rd circulator through the B21 ends of the 23 × 3rd bonder
End, enters into the P12 ends of the first polarization beam combiner through the 3rd circulator C32 ends；Second beam light is through the 23 × 3rd bonder
B22 ends enter into the P22 ends of the second polarization beam combiner；Three-beam enters into through the B23 ends of the 23 × 3rd bonder
The P32 ends of three polarization beam combiners.
The light for being input into the P11 ends and P12 ends of the first polarization beam combiner closes the entrance of Shu Houjing P13 ends in the first polarization beam combiner
Be converted to first signal of telecommunication and be input into data processor to the first photodetector, the first photodetectors of Jing.It is input into second inclined
Shake bundling device P21 ends and P22 ends light the second polarization beam combiner close Shu Houjing P23 ends enter into the second photodetector,
The second photodetectors of Jing are converted to second signal of telecommunication and are input into data processor.Be input into the 3rd polarization beam combiner P31 ends and
The light at P32 ends closes Shu Houjing P33 ends in the 3rd polarization beam combiner and enters into the 3rd photodetector, the 3rd photodetectors of Jing turn
It is changed to the 3rd signal of telecommunication to be input into data processor.First signal of telecommunication, second signal of telecommunication and the 3rd signal of telecommunication send into data simultaneously
Processor carries out the demodulation of 3 × 3 bonder algorithms, demodulates corresponding transducing signal.
According to the light intensity magnitude that the first photodetector, the second photodetector, the 3rd photodetector are received, data
Processor can control the first voltage of the output of voltage output device 103 in the first Polarization Controller 11, control second respectively
The first voltage of the output of voltage output device 103 in Polarization Controller 12, to realize the first line polarized light and the second linear polarization
The output of light.Additionally, data processor can control the output of voltage output device 103 in the first Polarization Controller 11 respectively
The second voltage of the output of voltage output device 103 in second voltage and the second Polarization Controller 12, to adjust First Line respectively
The polarization direction of polarized light and the second line polarized light so that the polarization direction of the first line polarized light and the second line polarized light is mutually just
Hand over.
In sum, compared to existing Polarization Controller, in Polarization Controller provided in an embodiment of the present invention 10, by λ/
4 fiber optic coils are wound in the outer wall of tubular piezoelectric ceramics 101, are adjusted using the mode of feedback regulation and are applied to piezoelectric ceramics 101
On voltage, the control accuracy of polarization state can be effectively improved.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of Polarization Controller, it is characterised in that including the fiber optic coils of the outer wall for being wound in tubular piezoelectric ceramics, the light
Fine coil is λ/4 fiber optic coils, the fiber optic coils for being the output of the second light beam by the first incident Beam Transformation, the cylinder
Shape piezoelectric ceramics is used under alive control outside the polarization state for adjusting second light beam.
2. Polarization Controller according to claim 1, it is characterised in that the Polarization Controller is also filled including voltage output
Put, the tubular piezoelectric ceramics is electrically connected with the voltage output device, the voltage output device is used to export described additional
Voltage.
3. Polarization Controller according to claim 2, it is characterised in that the Polarization Controller also includes the first housing,
The fiber optic coils of the outer wall for being wound in tubular piezoelectric ceramics are packaged in the first shell body.
4. Polarization Controller according to claim 3, it is characterised in that be filled with epoxy resin in the first shell body,
The epoxy resin is for the fiber optic coils of the outer wall for being wound in tubular piezoelectric ceramics are packaged in the first shell body.
5. Polarization Controller according to claim 3, it is characterised in that the Polarization Controller also includes motor and transmission
Axle, the motor are connected with the rotation connector for being arranged at first housing bottom by the power transmission shaft, the motor with
The voltage output device electrical connection；
The motor is used to drive the fiber optic coils to turn to predeterminated position so that the fiber optic coils are by the first incident light
Beam is converted to the second light beam output of default polarization direction.
6. Polarization Controller according to claim 5, it is characterised in that the motor is motor.
7. Polarization Controller according to claim 5, it is characterised in that the Polarization Controller also includes the second housing,
First housing for being packaged with the fiber optic coils of the outer wall for being wound in tubular piezoelectric ceramics is arranged on second housing
Interior, second housing is provided with the first opening, the second opening and the 3rd opening, and described first is open for penetrating the transmission
Axle, described second coil for passing the fiber optic coils that is open enter line, and the described 3rd is open for passing the optical fiber cable
The coil outlet of circle.
8. Polarization Controller according to claim 7, it is characterised in that the coil enters line to be fixed by the first fixture
In the coil Ru Xian bearings being arranged in the second shell body, the coil outlet is fixed on by the second fixture and is arranged on
Coil outlet bearing in the second shell body.
9. Polarization Controller according to claim 1, it is characterised in that the Polarization Controller also include first port,
Second port, the 3rd port and the 4th port, the first port are optical coupled with the input of the fiber optic coils, and described
Two-port netwerk is optical coupled with the outfan of the fiber optic coils, and the 3rd port is electrically connected with the positive pole of the tubular piezoelectric ceramics
Connect, the 4th port is electrically connected with the negative pole of the tubular piezoelectric ceramics.
10. Polarization Controller according to claim 1, it is characterised in that the optical fiber is single mode resist bending optical fiber.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108508594A (en) * | 2018-06-08 | 2018-09-07 | 中国人民解放军国防科技大学 | High resonant frequency optical fiber phase modulator based on piezoelectric ceramics |
| CN110119041A (en) * | 2018-02-07 | 2019-08-13 | 桂林电子科技大学 | Piezoelectric ceramics microarray polarization type optical fiber acousto-optic device |
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| DE3205798A1 (en) * | 1982-02-18 | 1983-08-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Fibre-optic phase modulator |
| JPH06147905A (en) * | 1992-11-04 | 1994-05-27 | Sumitomo Electric Ind Ltd | Polarization modulator and optical fiber gyro |
| CN1252872A (en) * | 1998-02-21 | 2000-05-10 | 图南***株式会社 | Optical fiber polarisation scrambler and operating parameter input method thereof |
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| DE3205798A1 (en) * | 1982-02-18 | 1983-08-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Fibre-optic phase modulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110119041A (en) * | 2018-02-07 | 2019-08-13 | 桂林电子科技大学 | Piezoelectric ceramics microarray polarization type optical fiber acousto-optic device |
| CN108508594A (en) * | 2018-06-08 | 2018-09-07 | 中国人民解放军国防科技大学 | High resonant frequency optical fiber phase modulator based on piezoelectric ceramics |
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| CN106526903B (en) | 2019-07-12 |
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