CN209102953U - A kind of three port optical loop device of compact - Google Patents
A kind of three port optical loop device of compact Download PDFInfo
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- CN209102953U CN209102953U CN201821866696.6U CN201821866696U CN209102953U CN 209102953 U CN209102953 U CN 209102953U CN 201821866696 U CN201821866696 U CN 201821866696U CN 209102953 U CN209102953 U CN 209102953U
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Abstract
The utility model discloses a kind of three port optical loop devices of compact, including three optical fibre optical fibre heads, beam splitter/combiner, polarization form converter, light beam circulator, collimation lens and reflecting mirror；The three optical fibre optical fibres head, beam splitter/combiner, polarization form converter, light beam circulator, collimation lens and reflecting mirror are sequentially arranged on the optical transport axis of the optical loop device；One of transmission path of light is, the light that the three optical fibre optical fibres head first end issues is after the beam splitter/combiner beam splitting, successively pass through polarization form converter, light beam circulator and collimation lens, reflecting mirror described in directive, after reflecting mirror reflects, successively after the conjunction beam of the collimation lens, light beam circulator, polarization form converter and the beam splitter/combiner, back to the second end of the three optical fibre optical fibres head.The utility model can reduce element usage quantity and volume, reduction assembly difficulty, the reliability for improving product, reduce size and reduce cost.
Description
Technical field
The utility model relates to the optical passive component of optical fiber telecommunications system, more particularly to a kind of compact-sized polarization are unrelated
Optical loop device.
Background technique
Three port optical loop devices be include optical passive component there are three port, light beam from optical loop device first
Port input, will export from second port, but export from the light of second port input without from first port, but from third
Port output.Optical circulator can realize that wavelength is unrelated in simple optical fiber and polarize unrelated transmitted in both directions, be widely used in list
Among fine two-way BOSA, OCM, OTDR, OPM optical path.
The typical structure of optical loop device is by first collimator, optical splitter, polarization form converter, light beam circulator, light combination
Device, six part of the second collimator are constituted.Wherein, the second part optical splitter in polarization form converter and light beam circulator two sides
With Part V splicer, the polarization beam splitter being usually made by monolithic birefringece crystal, light beam can be divided by it
The two orthogonal linearly polarized lights of beam polarization state, or by the orthogonal linear polarization combiner of two beam polarization states at light beam；The
Three parts are polarization converted device, the perpendicular linearly polarized light of the two beam polarization states that can isolate optical splitter and splicer
Polarization state does nonreciprocity rotation by certain angle respectively, usually by two panels or the above crystal half-wave plate heap of two panels and a piece of
Faraday rotation piece composition；First and Part VI first collimator and the second collimator be single optical fiber calibrator or double light
Fine collimator；Part IV light beam circulator needs to transmit the light beam of different linear polarizations by different propagation path of light,
Particular beam is set to realize good coupling to particular fiber, it is usually monolithic birefringece crystal or birefringece crystal component shape
At.
In recent years, the requirement of the small size of market focus ring road device and low cost had been continuously improved, and the existing ring of light
Road device can no longer meet the requirement of Vehicles Collected from Market since the element used is more, discrete component volume is big.
Summary of the invention
The purpose of this utility model is that the disadvantages mentioned above for overcoming existing optical loop device, simplifies the structure of device, subtracts
Few element usage quantity and volume, the reliability for improving product, reduce size and reduce cost reduction assembly difficulty.
To achieve the above object, the utility model provides following scheme:
A kind of three port optical loop device of compact, including three optical fibre optical fibre heads, beam splitter/combiner, polarization form converter,
Light beam circulator, collimation lens and reflecting mirror；The three optical fibre optical fibres head, beam splitter/combiner, polarization form converter, light beam ring
Road device, collimation lens and reflecting mirror are sequentially arranged on the optical transport axis of the optical loop device；Three optical fibre optical fibre
The light that head first end issues successively passes through polarization form converter, light beam circulator and standard after the beam splitter/combiner beam splitting
Straight lens, reflecting mirror described in directive successively turn by the collimation lens, light beam circulator, polarization state after reflecting mirror reflects
After the conjunction beam of parallel operation and the beam splitter/combiner, back to the second end of the three optical fibre optical fibres head, three optical fibre optical fibre
The light that head second end issues successively passes through polarization form converter, light beam circulator and standard after the beam splitter/combiner beam splitting
Straight lens, reflecting mirror described in directive successively turn by the collimation lens, light beam circulator, polarization state after reflecting mirror reflects
After the conjunction beam of parallel operation and the beam splitter/combiner, back to the third end of the three optical fibre optical fibres head.
Optionally, the polarization form converter include along the beam splitter/combiner to the light beam circulator optical path successively
The half-wave plate heap of setting and the Faraday rotator of nonreciprocity.
Optionally, the half-wave plate heap includes the optical transmission direction along the beam splitter/combiner to the Faraday rotator
The sub- half-wave plate heap of first to be connected in series and the second sub- wave-plate stack, the first sub- half-wave plate heap by optical axis direction it is different first
Half-wave plate and the second half-wave plate are spliced side by side, the second sub- half-wave plate heap by the different third half-wave plate of optical axis direction and
4th half-wave plate is spliced side by side, the splicing boundary line of first half-wave plate and the second half-wave plate and the third half-wave plate and
The splicing boundary line of 4th half-wave plate is mutually perpendicular to.
Optionally, the boundary line direction of described the first of the half-wave plate heap the sub- half-wave plate heap and the beam splitter/combiner
Beam splitting conjunction Shu Fangxiang is parallel, also vertical with the direction arranged in a straight line of fiber array simultaneously；
First half-wave plate, the second half-wave plate, third half-wave plate and the 4th half-wave plate optical axis angle should meet:
First relational expression:
Second relational expression:
Wherein, Θ 1 is the first half-wave plate optical axis angle, and Θ 2 is the second half-wave plate optical axis angle, and β 1 is third half-wave plate light
Shaft angle degree, β 2 are the 4th half-wave plate optical axis angle；Θ 1 takes -90 ° to 90 ° any one angle value, k1, k2, l1, l2, m1,
N1 takes any one integer value.
Optionally, the boundary line direction of described the first of the half-wave plate heap the sub- half-wave plate heap and the beam splitter/combiner
Beam splitting conjunction Shu Fangxiang is vertical, also parallel with the direction arranged in a straight line of fiber array simultaneously；
First half-wave plate, the second half-wave plate, third half-wave plate and the 4th half-wave plate optical axis angle should meet:
Third relational expression:
4th relational expression:
Wherein, α 1 is the first half-wave plate optical axis angle, and α 2 is the second half-wave plate optical axis angle, and γ 1 is third half-wave plate light
Shaft angle degree, γ 2 are the 4th half-wave plate optical axis angle；α 1 takes -90 ° to 90 ° any one angle value, g1, g2, h1, h2, i1,
J1 takes any one integer value.
Optionally, the beam splitter/combiner is light beam shifter.
Optionally, the beam splitter/combiner is double polarizing light beam displacement device and 45 degree of angle half-wave plate components；The dual-polarization
Pattern displacement device includes the first light beam shifter and the second light beam shifter；45 degree of angle half-wave plates are placed in described
Between first light beam shifter and the second light beam shifter, the first light beam shifter, second are partially
Vibration pattern displacement device and six light pass surfaces of 45 degree of angle half-wave plates are parallel to each other, the first light beam shifter and the
Two light beam shifter optical axises are directed toward and the light pass surfaces of 45 degree of angle half-wave plates mirror symmetry each other；45 degree of angle half-wave plates
Optical axis is directed toward and the optical axis of the first light beam shifter is directed toward and projects into positive 45 degree of angles or negative in light pass surface
45 degree of angles.
Optionally, the light beam circulator is light beam shifter.
Optionally, the three optical fibre optical fibres head is made of capillary and three optical fiber being fixed in capillary.
Optionally, the end of three optical fiber is thermal expansion beam TEC optical fiber or the end welding one in three optical fiber
The large mode field diameter optical fiber of section graded index.
According to specific embodiment provided by the utility model, the utility model discloses following technical effects: this is practical new
The three port optical loop device of compact of type, folds optical path and one using reflection and is connected by two sub- half-wave plate heaps and formed
Half-wave plate heap not only obtains very big simplification in structure, also more convenient in adjustment assembly, while the unfailing performance of product
It is improved, reduces costs.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is a kind of schematic diagram of structure of the utility model half-wave plate heap；
Fig. 2 is the schematic diagram of another structure of the utility model half-wave plate heap；
Fig. 3 is the schematic diagram of the utility model fiber array structure；
Fig. 4 is the schematic diagram of the utility model double polarizing light beam displacement device and 45 degree of angle half-wave plate components；
Fig. 5 is the schematic top plan view of the utility model optical loop device；
Fig. 6 is the schematic side view of the utility model optical loop device；
Loop light path schematic diagram of the Fig. 7 between the utility model fiber port；
Fig. 8 a is the first schematic diagram of the transmission path of light in the utility model optical transmission process；
Fig. 8 b is the first schematic diagram that polarization state develops in the utility model optical transmission process；
Fig. 9 a is the second schematic diagram of the transmission path of light in the utility model optical transmission process；
Fig. 9 b is the second schematic diagram of polarization state evolution in the utility model optical transmission process；
Figure 10 a is the third schematic diagram of the transmission path of light in the utility model optical transmission process；
Figure 10 b is polarization state evolution third schematic diagram in the utility model optical transmission process；
Figure 11 a is the 4th schematic diagram of the transmission path of light in the utility model optical transmission process；
Figure 11 b is the 4th schematic diagram of polarization state evolution in the utility model optical transmission process；
Figure 12 a is the 5th schematic diagram of the transmission path of light in the utility model optical transmission process；
Figure 12 b is the 5th schematic diagram of polarization state evolution in the utility model optical transmission process；
Figure 13 a is the 6th schematic diagram of the transmission path of light in the utility model optical transmission process
Figure 13 b is the 6th schematic diagram of polarization state evolution in the utility model optical transmission process；
Figure 14 a is the 7th schematic diagram of the transmission path of light in the utility model optical transmission process；
Figure 14 b is the 7th schematic diagram of polarization state evolution in the utility model optical transmission process；
Figure 15 a is the 8th schematic diagram of the transmission path of light in the utility model optical transmission process；
Figure 15 b is the 8th schematic diagram of polarization state evolution in the utility model optical transmission process；
Figure 16 a is the 9th schematic diagram of the transmission path of light in the utility model optical transmission process；
Figure 16 b is the 9th schematic diagram of polarization state evolution in the utility model optical transmission process；
Figure 17 a is the tenth schematic diagram of the transmission path of light in the utility model optical transmission process；
Figure 17 b is the tenth schematic diagram of polarization state evolution in the utility model optical transmission process.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The purpose of the utility model is to provide a kind of three port optical loop devices of compact, have and reduce element usage quantity
With volume, reduce assembly difficulty, improve product reliability, reduce size and reduce cost the characteristics of.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
A kind of three port optical loop device of compact, including three optical fibre optical fibre heads, beam splitter/combiner, polarization form converter,
Light beam circulator, collimation lens and reflecting mirror；Three optical fibre optical fibre heads, beam splitter/combiner, polarization form converter, light beam loop
Device, collimation lens and reflecting mirror are sequentially arranged on the optical transport axis of the optical loop device；Three optical fibre optical fibre heads first
It holds the light issued after the beam splitter/combiner beam splitting, successively passes through polarization form converter, light beam circulator and collimation lens,
Reflecting mirror described in directive, after reflecting mirror reflects, successively by the collimation lens, light beam circulator, polarization form converter with
And after the conjunction beam of beam splitter/combiner, back to the second end of the three optical fibre optical fibres head；The light that second end issues is by described point
After beam bundling device beam splitting, successively pass through polarization form converter, light beam circulator and collimation lens, reflecting mirror described in directive, through anti-
After penetrating mirror reflection, successively by the conjunction beam of the collimation lens, light beam circulator, polarization form converter and beam splitter/combiner
Afterwards, back to the third end of the three optical fibre optical fibres head
Polarization form converter includes the half-wave plate heap set gradually along beam splitter/combiner to light beam circulator optical path and non-
The Faraday rotator of reciprocity.
Half-wave plate heap includes the first son half being connected in series along the optical transmission direction of beam splitter/combiner to Faraday rotator
Wave-plate stack and the second sub- wave-plate stack, the first sub- half-wave plate heap by the first different half-wave plate of optical axis direction and the second half-wave plate side by side
It being spliced, the second sub- half-wave plate heap is spliced side by side by the different third half-wave plate of optical axis direction and the 4th half-wave plate, the
Half of wave plate and the splicing boundary line of the second half-wave plate and the splicing boundary line of the third half-wave plate and the 4th half-wave plate are mutually perpendicular to.
Polarization form converter by half-wave plate (HWP, Half-waveplate) heap and nonreciprocity Faraday rotator
(Faraday Rotator) composition, Faraday rotator are made of the Faraday magnetic optic crystals and magnet of nonreciprocity, faraday
Magneto-optical crystal can be RIG crystal (rare-earth iron garnet) or be yig crystal (Yttrium iron
garnet)；Half-wave plate heap is connected in series by the first sub- half-wave plate heap and the second sub- wave-plate stack along optical transmission direction, the first sub- half-wave
Piece heap wave-plate stack than second closer to three optical fibre optical fibre heads, the first sub- half-wave plate heap by two optical axis directions it is different the first half
Against being formed in parallel, the two forms a boundary line for wave plate and the second half-wave plate, the second sub- half-wave plate heap by two optical axis directions not
For same third half-wave plate and the 4th half-wave plate against being formed in parallel, the two forms a boundary line, the boundary of the first sub- half-wave plate heap
The boundary line of line and the second sub- half-wave plate heap is mutually perpendicular to；The material of 45 degree of angle half-wave plates is birefringece crystal, can be quartz
Crystal (Quartz) or Yttrium Orthovanadate (YVO4) crystal or lithium niobate (LiNbO3) crystal or rutile (Rutile) are brilliant
Body；Half-wave plate heap can form two kinds of another structure combinations of a kind of structure and half-wave plate heap of half-wave plate heap, half-wave plate heap
The boundary line direction of first sub- half-wave plate heap is parallel with the beam splitting of beam splitter/combiner conjunction Shu Fangxiang, also straight with fiber array simultaneously
Line orientation is vertical.Alternatively, the boundary line direction of the first sub- half-wave plate heap of half-wave plate heap and the beam splitting of beam splitter/combiner are closed
Shu Fangxiang is vertical, also parallel with the direction arranged in a straight line of fiber array simultaneously.
In a kind of structure of half-wave plate heap, beam is closed in the boundary line direction of the first sub- half-wave plate heap and the beam splitting of beam splitter/combiner
Direction is parallel, also vertical with the direction arranged in a straight line of fiber array simultaneously.
First half-wave plate, the second half-wave plate, third half-wave plate and the 4th half-wave plate optical axis angle should meet:
First relational expression:
Second relational expression:
Wherein, Θ 1 is the first half-wave plate optical axis angle, and Θ 2 is the second half-wave plate optical axis angle, and β 1 is third half-wave plate light
Shaft angle degree, β 2 are the 4th half-wave plate optical axis angle；Θ 1 takes -90 ° to 90 ° any one angle value, k1, k2, l1, l2, m1,
N1 takes any one integer value.
In another structure of half-wave plate heap, the boundary line direction of the first sub- half-wave plate heap and the beam splitting of beam splitter/combiner are closed
Shu Fangxiang is vertical, also parallel with the direction arranged in a straight line of fiber array simultaneously.
First half-wave plate, the second half-wave plate, third half-wave plate and the 4th half-wave plate optical axis angle should meet:
Third relational expression:
4th relational expression:
Wherein, α 1 is the first half-wave plate optical axis angle, and α 2 is the second half-wave plate optical axis angle, and γ 1 is third half-wave plate, γ
2 be the 4th half-wave plate optical axis angle；α 1 takes -90 ° to 90 ° any one angle value, and g1, g2, h1, h2, i1, j1 take any one
Integer value.
Beam splitter/combiner can be light beam shifter.
Beam splitter/combiner can also be made of double polarizing light beam displacement device and 45 degree of angle half-wave plate components；Dual-polarization light beam position
Moving device includes the first light beam shifter and the second light beam shifter；45 degree of angle half-wave plates are placed in the first light beam position
It moves between device and the second light beam shifter, the first light beam shifter, the second light beam shifter and 45 degree of angles half
Six light pass surfaces of wave plate are parallel to each other, and the first light beam shifter and the second light beam shifter optical axis are directed toward and 45 degree
The light pass surface of angle half-wave plate mirror symmetry each other；The optical axis of 45 degree of angle half-wave plates is directed toward the optical axis with the first light beam shifter
Direction projects into positive 45 degree of angles or minus 45 degree of angles in light pass surface.The material of double polarizing light beam displacement device is birefringent
Crystal, birefringent crystal material are positive uniaxial crystal, including but not limited to yttrium vanadate YVO4, rutile Rutile, quartz
Quartz；Either uniaxial negative crystal, including but not limited to lithium niobate LiNbO3, calcite CaCO3.
Light beam circulator can be a light beam shifter (BD, Beam Displacer), and material is birefringent
Crystal, birefringent crystal material are positive uniaxial crystal, including but not limited to yttrium vanadate YVO4, rutile Rutile, quartz
Quartz；Either uniaxial negative crystal, including but not limited to lithium niobate LiNbO3, calcite CaCO3；The optical axis of light beam circulator
Direction is coplanar with fiber array one dimensional arrangement direction.
Collimation lens is self-focusing microlens (Grin Lens) or is C lens (C-Lens).
Reflecting mirror is the multilayer dielectricity high-reflecting film being coated on substrate, or multilayer dielectricity high-reflecting film is coated on described
The end face of self-focusing microlens.
Three optical fibre optical fibre heads are by capillary and are fixed on forming in capillary in three optical fiber of one-dimensional array.
The end of three optical fiber is thermal expansion beam TEC optical fiber, mode field diameter (MFD, the Mode Field of thermal expansion beam TEC optical fiber
Diameter it) is extended by thermal expansion beam technique, the angle of divergence of fiber exit light is reduced, and the MFD after thermal expansion beam can be 10um
To 50um, preferable situation is 15um to 30um.Or the large mode field diameter of one section of graded index of end welding in optical fiber
Optical fiber, for reducing the angle of divergence of fiber exit light.
The three port optical loop device of compact of the utility model, using reflection folding optical path and one by two sons half
Wave-plate stack is connected the half-wave plate heap to be formed, and very big simplification is not only obtained in structure, also more convenient in adjustment assembly, simultaneously
The unfailing performance of product is also improved, and is reduced costs.
Embodiment 1
In the present embodiment, beam splitter/combiner 2 be a light beam shifter, optical axis X1 on the y-z plane, first,
Three quadrant is directed toward；Using a kind of structure of half-wave plate heap, k1, k2 and m1 distinguish value 0,0 and 1,11.25 ° of 1 value of Θ, according to
First relational expression, then Θ 2, β 1 and β 2 be respectively, -33.75 °, 33.75 ° and -11.25 °；Faraday rotator 32 along z-axis just
Direction is viewed as 45° angle rotation counterclockwise；In z-x plane, the first and third quadrant is directed toward the optical axis X2 of light beam circulator 4.Beam splitting
Bundling device 2 and light beam circulator 4 are all YVO4 crystal.
In Fig. 8 b and Fig. 9 b 600,601,602,603,604,605,606,607,608,609,610,611,612,
613,614,615,616,617,618 and 619 be the transmission path of corresponding light and the polarization state situation of position.
In Fig. 8 a and Fig. 8 b, light 600 is emitted from TEC optical fiber a, is divergent beams, after incident beam splitter/combiner 2, in space
On be divided into extraordinary ray (extraordinary ray) linearly polarized light along the y-axis direction and ordinary light (ordinary ray) line is inclined
Shake light, and as illustrated in 601, extraordinary ray successively passes through half-wave plate 1a and 1c, and polarization direction rotates clockwise 45° angle, ordinary light according to
Secondary to pass through half-wave plate 1a and 1d, polarization direction rotates 45° angle counterclockwise, and extraordinary ray is parallel with the polarization direction of ordinary light, such as
Shown in 602, revolved counterclockwise together after Faraday rotator 32 along the two of y-x coordinate system, the 45° angle direction of four-quadrant
Turn 45° angle, as shown in 603, the parallel y-axis in polarization direction, this two bunch polarised light becomes the ordinary light of light beam circulator 4 together,
Straight trip is after light beam circulator 4, and as indicated at 604, after lens, two light beams are respectively collimated and are mutually in 1 two light beams
Reflecting mirror is incident at clamp angle, and dimensional orientation of the two beam reflected lights in y-axis direction also exchanges simultaneously, and polarization direction does not occur
Change, become converged light after lens, as shown at 605, two light beams become the ordinary light of light beam circulator 4 together again, directly
After light beam circulator 4 of passing through, two light beams as shown by 606, after Faraday rotator 32, are rotated counterclockwise 45 ° together
Angle, as shown in 607, polarization direction along y-x coordinate system one, the 45° angle direction of three quadrant, wherein light beam successively passes through half-wave
Piece 1c and 1b, polarization direction rotate clockwise 45° angle, become the extraordinary ray of beam splitter/combiner 2, another light beam is successively through more than half
Wave plate 1d and 1b, polarization direction rotate 45° angle counterclockwise, become the ordinary light of beam splitter/combiner 2, as shown at 608, pass through beam splitting
After bundling device 2, Shu Chonghe is closed in two-beam space, becomes light beam, into TEC optical fiber b.
In Fig. 9 a and Fig. 9 b, light 610 is emitted from TEC optical fiber b, is divergent beams, after incident beam splitter/combiner 2, in space
On be divided into extraordinary ray (extraordinary ray) linearly polarized light along the y-axis direction and ordinary light (ordinary ray) line is inclined
Shake light, and as shown in 611, extraordinary ray successively passes through half-wave plate 1b and 1c, and polarization direction rotates 45° angle counterclockwise, ordinary light according to
Secondary to pass through half-wave plate 1b and 1d, polarization direction rotates clockwise 45° angle, and extraordinary ray is parallel with the polarization direction of ordinary light, such as
Shown in 612, revolved counterclockwise together after Faraday rotator 32 along the one of y-x coordinate system, the 45° angle direction of three quadrant
Turn 45° angle, as shown in 613, the vertical y-axis in polarization direction, this two bunch polarised light becomes the extraordinary of light beam circulator 4 together
Light, by, by along the direction optical axis X2 deviation, two light beams are as shown in 614 when light beam circulator 4, after lens, two light beams
It is respectively collimated and it is mutually in a certain angle be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction is also sent out simultaneously
Raw exchange, polarization direction do not change, become converged light after lens, and as shown in 615, two light beams become light together again
The extraordinary ray of beam circulator 4, by, by along the direction optical axis X2 deviation, two light beams are as shown in 616, warp when light beam circulator 4
After crossing Faraday rotator 32, be rotated counterclockwise 45° angle together, as shown in 617, polarization direction along y-x coordinate system two, four
The 45° angle direction of quadrant, then, wherein light beam successively passes through half-wave plate 1c and 1a, and polarization direction rotates 45° angle counterclockwise,
As the extraordinary ray of beam splitter/combiner 2, another light beam successively passes through half-wave plate 1d and 1a, and polarization direction rotates clockwise 45 °
Angle becomes the ordinary light of beam splitter/combiner 2, and as shown in 618, after beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, at
For light beam, into TEC optical fiber c.
The present embodiment realizes TEC optical fiber a entering light, TEC optical fiber b goes out light and TEC optical fiber b entering light, TEC optical fiber c go out light
Circuit functionality.
Embodiment 2
In the present embodiment, beam splitter/combiner 2 be a light beam shifter, optical axis X1 on the y-z plane, first,
Three quadrant is directed toward；Using a kind of structure of half-wave plate heap, l1, l2 and n1 distinguish value 0,1 and--11.25 ° of 1, Θ, 1 value, root
According to the second relational expression, then Θ 2, β 1 and β 2 are 33.75 °, -33.75 ° and 11.25 ° respectively；Faraday rotator 32 along z-axis just
Direction is viewed as 45° angle rotation clockwise；In z-x plane, the first and third quadrant is directed toward the optical axis X2 of light beam circulator 4.Beam splitting
Bundling device 2 and light beam circulator 4 are all YVO4 crystal.
In Figure 10 b and Figure 11 b 700,701,702,703,704,705,706,707,708,709,710,711,712,
713,714,715,716,717,718 and 719 be the transmission path of corresponding light and the polarization state situation of position.
In Figure 10 a and Figure 10 b, light 700 is emitted from TEC optical fiber a, is divergent beams, after incident beam splitter/combiner 2, in sky
Between on be divided into extraordinary ray (extraordinary ray) linearly polarized light and ordinary light (ordinary ray) line along the y-axis direction
Polarised light, as shown in 701, extraordinary ray successively passes through half-wave plate 1a and 1c, and polarization direction rotates 45° angle, ordinary light counterclockwise
Successively pass through half-wave plate 1a and 1d, polarization direction rotates clockwise 45° angle, and extraordinary ray is parallel with the polarization direction of ordinary light,
As shown in 702, along y-x coordinate system two, the 45° angle direction of four-quadrant, it is clockwise together after Faraday rotator 32
45° angle is rotated, as shown in 703, the parallel y-axis in polarization direction, this two bunch polarised light becomes the ordinary of light beam circulator 4 together
Light is kept straight on after light beam circulator 4, and as indicated by 704, after lens, two light beams are respectively collimated and mutual for two light beams
In a certain angle to be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction also exchanges simultaneously, and polarization direction is not
It changes, becomes converged light after lens, as shown in 705, two light beams are again together as the ordinary of light beam circulator 4
Light is kept straight on after light beam circulator 4, and two light beams as shown at 706, after Faraday rotator 32, are revolved clockwise together
Turn 45° angle, as shown in 707, polarization direction along y-x coordinate system one, the 45° angle direction of three quadrant, wherein light beam successively passes through
Half-wave plate 1c and 1b are crossed, polarization direction rotates 45° angle counterclockwise, becomes the extraordinary ray of beam splitter/combiner 2, another light beam is successively
By half-wave plate 1d and 1b, polarization direction rotates clockwise 45° angle, becomes the ordinary light of beam splitter/combiner 2, as shown in 708, leads to
After crossing beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, becomes light beam, into TEC optical fiber b.
In Figure 11 a and 11b, light 710 is emitted from TEC optical fiber b, is divergent beams, after incident beam splitter/combiner 2, in space
On be divided into extraordinary ray (extraordinary ray) linearly polarized light along the y-axis direction and ordinary light (ordinary ray) line is inclined
Shake light, and as shown in 711, extraordinary ray successively passes through half-wave plate 1b and 1c, and polarization direction rotates 45° angle counterclockwise, ordinary light according to
Secondary to pass through half-wave plate 1b and 1d, polarization direction rotates clockwise 45° angle, and extraordinary ray is parallel with the polarization direction of ordinary light, such as
Shown in 612, revolved counterclockwise together after Faraday rotator 32 along the two of y-x coordinate system, the 45° angle direction of four-quadrant
Turn 45° angle, as shown in 613, the vertical y-axis in polarization direction, this two bunch polarised light becomes the extraordinary of light beam circulator 4 together
Light, by, by along the direction optical axis X2 deviation, two light beams are as shown in 714 when light beam circulator 4, after lens, two light beams
It is respectively collimated and it is mutually in a certain angle be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction is also sent out simultaneously
Raw exchange, polarization direction do not change, become converged light after lens, and as shown in 715, two light beams become light together again
The extraordinary ray of beam circulator 4, by, by along the direction optical axis X2 deviation, two light beams are as shown in 716, warp when light beam circulator 4
After crossing Faraday rotator 32, rotated clockwise 45° angle together, as shown in 717, polarization direction along y-x coordinate system one, three
The 45° angle direction of quadrant, then, wherein light beam successively passes through half-wave plate 1c and 1a, and polarization direction rotates clockwise 45° angle,
As the extraordinary ray of beam splitter/combiner 2, another light beam successively passes through half-wave plate 1d and 1a, and polarization direction rotates 45 ° counterclockwise
Angle becomes the ordinary light of beam splitter/combiner 2, and as shown by 718, after beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, at
For light beam, into TEC optical fiber c.
The present embodiment realizes TEC optical fiber a entering light, TEC optical fiber b goes out light and TEC optical fiber b entering light, TEC optical fiber c go out light
Circuit functionality.
Embodiment 3
In the present embodiment, beam splitter/combiner 2 be a light beam shifter, optical axis X1 on the y-z plane, first,
Three quadrant is directed toward；Using another structure of half-wave plate heap, g1, g2 and i1 distinguish value 0,1 and 0,11.25 ° of 1 value of α, according to
Third relational expression, then α 2, γ 1 and γ 2 are -33.75 °, 33.75 ° and -11.25 ° respectively；Faraday rotator 32 is along z-axis pros
It is rotated to 45° angle counterclockwise is viewed as；In z-x plane, the first and third quadrant is directed toward the optical axis X2 of light beam circulator 4.Beam splitting is closed
Beam device 2 and light beam circulator 4 are all YVO4 crystal.
In Figure 12 b and Figure 13 b 800,801,802,803,804,805,806,807,808,809,810,811,812,
813,814,815,816,817,818 and 819 be the transmission path of corresponding light and the polarization state situation of position.
In Figure 12 a and Figure 12 b, light 800 is emitted from TEC optical fiber a, is divergent beams, after incident beam splitter/combiner 2, in sky
Between on be divided into extraordinary ray (extraordinary ray) linearly polarized light and ordinary light (ordinary ray) line along the y-axis direction
Polarised light, as shown in 801, extraordinary ray successively passes through half-wave plate 2d and 2c, and polarization direction rotates clockwise 45° angle, ordinary light
Successively pass through half-wave plate 2b and 2c, polarization direction rotates 45° angle counterclockwise, and extraordinary ray is parallel with the polarization direction of ordinary light,
As shown in 802, along y-x coordinate system one, the 45° angle direction of three quadrant, it is counterclockwise together after Faraday rotator 32
45° angle is rotated, as shown in 803, the parallel y-axis in polarization direction, this two bunch polarised light becomes the ordinary of light beam circulator 4 together
Light is kept straight on after light beam circulator 4, and two light beams are as shown in 804, and after lens, two light beams are respectively collimated and mutual
In a certain angle to be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction also exchanges simultaneously, and polarization direction is not
It changes, becomes converged light after lens, as shown in 805, two light beams are again together as the ordinary of light beam circulator 4
Light is kept straight on after light beam circulator 4, and two light beams are as shown in 806, after Faraday rotator 32, revolved counterclockwise together
Turn 45° angle, as shown in 807, polarization direction along y-x coordinate system two, the 45° angle direction of four-quadrant, wherein light beam successively passes through
Half-wave plate 2d and 2d are crossed, polarization direction rotates clockwise 45° angle, becomes the extraordinary ray of beam splitter/combiner 2, another light beam is successively
By half-wave plate 2d and 2b, polarization direction rotates 45° angle counterclockwise, becomes the ordinary light of beam splitter/combiner 2, as shown in 808, leads to
After crossing beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, becomes light beam, into TEC optical fiber b.
In Figure 13 a and Figure 13 b, light 810 is emitted from TEC optical fiber b, is divergent beams, after incident beam splitter/combiner 2, in sky
Between on be divided into extraordinary ray (extraordinary ray) linearly polarized light and ordinary light (ordinary ray) line along the y-axis direction
Polarised light, as shown in 811, extraordinary ray successively passes through half-wave plate 2d and 2d, and polarization direction rotates 45° angle, ordinary light counterclockwise
Successively pass through half-wave plate 2b and 2d, polarization direction rotates clockwise 45° angle, and extraordinary ray is parallel with the polarization direction of ordinary light,
As shown in 812, along y-x coordinate system one, the 45° angle direction of three quadrant, it is counterclockwise together after Faraday rotator 32
45° angle is rotated, as shown in 813, the vertical y-axis in polarization direction, this two bunch polarised light becomes the extraordinary of light beam circulator 4 together
Light, by, by along the direction optical axis X2 deviation, two light beams are as shown in 814 when light beam circulator 4, after lens, two light beams
It is respectively collimated and it is mutually in a certain angle be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction is also sent out simultaneously
Raw exchange, polarization direction do not change, become converged light after lens, and as shown in 815, two light beams become light together again
The extraordinary ray of beam circulator 4, by, by along the direction optical axis X2 deviation, two light beams are as shown in 816, warp when light beam circulator 4
After crossing Faraday rotator 32, be rotated counterclockwise 45° angle together, as shown in 817, polarization direction along y-x coordinate system two, four
The 45° angle direction of quadrant, then, wherein light beam successively passes through half-wave plate 2c and 2d, and polarization direction rotates 45° angle counterclockwise,
As the extraordinary ray of beam splitter/combiner 2, another light beam successively passes through half-wave plate 2c and 2b, and polarization direction rotates clockwise 45 °
Angle becomes the ordinary light of beam splitter/combiner 2, and as shown in 818, after beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, at
For light beam, into TEC optical fiber c.
The present embodiment realizes TEC optical fiber a entering light, TEC optical fiber b goes out light and TEC optical fiber b entering light, TEC optical fiber c go out light
Circuit functionality.
Embodiment 4
In the present embodiment, beam splitter/combiner 2 be a light beam shifter, optical axis X1 on the y-z plane, first,
Three quadrant is directed toward；Using another structure of half-wave plate heap, h1, h2 and j1 distinguish value 0,0 and 0, -11.25 ° of 1 value of α, root
According to the 4th relational expression, then α 2, γ 1 and γ 2 are 33.75 °, -33.75 ° and 11.25 ° respectively；Faraday rotator 32 along z-axis just
Direction is viewed as 45° angle rotation clockwise；In z-x plane, the first and third quadrant is directed toward the optical axis X2 of light beam circulator 4.Beam splitting
Bundling device 2 and light beam circulator 4 are all YVO4 crystal.
In Figure 14 b and Figure 15 b 900,901,902,903,904,905,906,907,908,909,910,911,912,
913,914,915,916,917,918 and 919 be the transmission path of corresponding light and the polarization state situation of position.
In Figure 14 a and Figure 14 b, light 900 is emitted from TEC optical fiber a, is divergent beams, after incident beam splitter/combiner 2, in sky
Between on be divided into extraordinary ray (extraordinary ray) linearly polarized light and ordinary light (ordinary ray) line along the y-axis direction
Polarised light, as shown in 901, extraordinary ray successively passes through half-wave plate 2d and 2c, and polarization direction rotates 45° angle, ordinary light counterclockwise
Successively pass through half-wave plate 2b and 2c, polarization direction rotates clockwise 45° angle, and extraordinary ray is parallel with the polarization direction of ordinary light,
As shown in 902, along y-x coordinate system one, the 45° angle direction of three quadrant, it is clockwise together after Faraday rotator 32
45° angle is rotated, as shown in 903, the parallel y-axis in polarization direction, this two bunch polarised light becomes the ordinary of light beam circulator 4 together
Light is kept straight on after light beam circulator 4, and two light beams are as shown in 904, and after lens, two light beams are respectively collimated and mutual
In a certain angle to be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction also exchanges simultaneously, and polarization direction is not
It changes, becomes converged light after lens, as shown at 905, two light beams are again together as the ordinary of light beam circulator 4
Light is kept straight on after light beam circulator 4, and two light beams are as shown in 906, after Faraday rotator 32, revolved clockwise together
Turn 45° angle, as shown in 907, polarization direction along y-x coordinate system two, the 45° angle direction of four-quadrant, wherein light beam successively passes through
Half-wave plate 2d and 2d are crossed, polarization direction rotates 45° angle counterclockwise, becomes the extraordinary ray of beam splitter/combiner 2, another light beam is successively
By half-wave plate 2d and 2b, polarization direction rotates clockwise 45° angle, becomes the ordinary light of beam splitter/combiner 2, as shown in 908, leads to
After crossing beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, becomes light beam, into TEC optical fiber b.
In Figure 15 a and Figure 15 b, light 910 is emitted from TEC optical fiber b, is divergent beams, after incident beam splitter/combiner 2, in sky
Between on be divided into extraordinary ray (extraordinary ray) linearly polarized light and ordinary light (ordinary ray) line along the y-axis direction
Polarised light, as shown in 911, extraordinary ray successively passes through half-wave plate 2d and 2d, and polarization direction rotates clockwise 45° angle, ordinary light
Successively pass through half-wave plate 2b and 2d, polarization direction rotates 45° angle counterclockwise, and extraordinary ray is parallel with the polarization direction of ordinary light,
As shown at 712, along y-x coordinate system two, the 45° angle direction of four-quadrant, it is clockwise together after Faraday rotator 32
45° angle is rotated, as shown in 913, the vertical y-axis in polarization direction, this two bunch polarised light becomes the extraordinary of light beam circulator 4 together
Light, by, by along the direction optical axis X2 deviation, two light beams are as shown in 914 when light beam circulator 4, after lens, two light beams
It is respectively collimated and it is mutually in a certain angle be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction is also sent out simultaneously
Raw exchange, polarization direction do not change, become converged light after lens, and as shown in 915, two light beams become light together again
The extraordinary ray of beam circulator 4, by, by along the direction optical axis X2 deviation, two light beams are as shown in 916, warp when light beam circulator 4
After crossing Faraday rotator 32, rotated clockwise 45° angle together, as shown in 917, polarization direction along y-x coordinate system one, three
The 45° angle direction of quadrant, then, wherein light beam successively passes through half-wave plate 2c and 2d, and polarization direction rotates clockwise 45° angle,
As the extraordinary ray of beam splitter/combiner 2, another light beam successively passes through half-wave plate 2c and 2b, and polarization direction rotates 45 ° counterclockwise
Angle becomes the ordinary light of beam splitter/combiner 2, and as shown in 918, after beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, at
For light beam, into TEC optical fiber c.
The present embodiment realizes TEC optical fiber a entering light, TEC optical fiber b goes out light and TEC optical fiber b entering light, TEC optical fiber c go out light
Circuit functionality.
Embodiment 5
In the present embodiment, beam splitter/combiner 2 be double polarizing light beam displacement device and 45 degree of angle half-wave plate components, optical axis X3,
X4 is on the y-z plane；Using a kind of structure of half-wave plate heap, k1, k2 and m1 distinguish value 0,0 and 1,11.25 ° of 1 value of Θ, root
According to the first relational expression, then Θ 2, β 1 and β 2 be respectively, -33.75 °, 33.75 ° and -11.25 °；Faraday rotator 32 is along z-axis
Positive direction is viewed as 45° angle rotation counterclockwise；In z-x plane, the first and third quadrant is directed toward the optical axis X2 of light beam circulator 4.Point
Beam bundling device 2 and light beam circulator 4 are all YVO4 crystal.
In Figure 16 b and Figure 17 b 1000,1001,1002,1003,1004,1005,1006,1007,1008,1009,
1010,611,1012,1013,1014,1015,1016,1017,1018 and 1019 for corresponding light transmission path and position it is inclined
Polarization state situation.
In Figure 16 a and Figure 16 b, light 1000 is emitted from TEC optical fiber a, is divergent beams, after incident beam splitter/combiner 2, in sky
Between on be divided into extraordinary ray (extraordinary ray) linearly polarized light and ordinary light (ordinary ray) line along the y-axis direction
Polarised light, as shown in 1001, extraordinary ray successively passes through half-wave plate 1a and 1c, and polarization direction rotates clockwise 45° angle, ordinary light
Successively pass through half-wave plate 1a and 1d, polarization direction rotates 45° angle counterclockwise, and extraordinary ray is parallel with the polarization direction of ordinary light,
As shown at 1002, along y-x coordinate system two, the 45° angle direction of four-quadrant, after Faraday rotator 32, together by the inverse time
Needle rotates 45° angle, and as shown at 1003, the parallel y-axis in polarization direction, this two bunch polarised light becomes seeking for light beam circulator 4 together
Ordinary light is kept straight on after light beam circulator 4, and two light beams are as shown in 1004, and after lens, two light beams are respectively collimated and phase
Mutually in a certain angle to be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction also exchanges simultaneously, polarization direction
It does not change, becomes converged light after lens, as shown in 1005, two light beams become seeking for light beam circulator 4 together again
Ordinary light is kept straight on after light beam circulator 4, and two light beams are counterclockwise together after Faraday rotator 32 as shown in 1006
Rotate 45° angle, as shown in 1007, polarization direction along y-x coordinate system one, the 45° angle direction of three quadrant, wherein light beam is successively
By half-wave plate 1c and 1b, polarization direction rotates clockwise 45° angle, becomes the extraordinary ray of beam splitter/combiner 2, another light beam according to
Secondary to pass through half-wave plate 1d and 1b, polarization direction rotates 45° angle counterclockwise, becomes the ordinary light of beam splitter/combiner 2, such as 1008 institutes
Show, after beam splitter/combiner 2, Shu Chonghe is closed in two-beam space, becomes light beam, into TEC optical fiber b.
In Figure 17 a and Figure 17 b, light 1010 is emitted from TEC optical fiber b, is divergent beams, after incident beam splitter/combiner 2, in sky
Between on be divided into extraordinary ray (extraordinary ray) linearly polarized light and ordinary light (ordinary ray) line along the y-axis direction
Polarised light, as shown in 1011, extraordinary ray successively passes through half-wave plate 1b and 1c, and polarization direction rotates 45° angle, ordinary light counterclockwise
Successively pass through half-wave plate 1b and 1d, polarization direction rotates clockwise 45° angle, and extraordinary ray is parallel with the polarization direction of ordinary light,
As shown in 1012, along y-x coordinate system one, the 45° angle direction of three quadrant, after Faraday rotator 32, together by the inverse time
Needle rotates 45° angle, and as shown in 1013, the vertical y-axis in polarization direction, this two bunch polarised light becomes the non-of light beam circulator 4 together
Ordinary light, by, by along the direction optical axis X2 deviation, two light beams are as shown in 1014 when light beam circulator 4, after lens, two
Light beam respectively be collimated and mutually it is in a certain angle be incident on reflecting mirror, dimensional orientation of the two beam reflected lights in y-axis direction is also same
Shi Fasheng exchange, polarization direction do not change, becomes converged light after lens, and as shown in 1015, two light beams are again together
As the extraordinary ray of light beam circulator 4, by when light beam circulator 4 by along the direction optical axis X2 deviation, two light beams such as 1016
It is shown, after Faraday rotator 32, it is rotated counterclockwise 45° angle together, as shown in 1017, polarization direction is along y-x coordinate
System two, the 45° angle direction of four-quadrant, then, wherein light beam successively passes through half-wave plate 1c and 1a, and polarization direction is revolved counterclockwise
Turn 45° angle, become the extraordinary ray of beam splitter/combiner 2, another light beam successively passes through half-wave plate 1d and 1a, and polarization direction is clockwise
45° angle is rotated, the ordinary light of beam splitter/combiner 2 is become, as shown in 1018, after beam splitter/combiner 2, beam is closed in two-beam space
It is overlapped, becomes light beam, into TEC optical fiber c.
The present embodiment realizes TEC optical fiber a entering light, TEC optical fiber b goes out light and TEC optical fiber b entering light, TEC optical fiber c go out light
Circuit functionality.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. a kind of three port optical loop device of compact, which is characterized in that including three optical fibre optical fibre heads, beam splitter/combiner, polarization
State converter, light beam circulator, collimation lens and reflecting mirror；The three optical fibre optical fibres head, beam splitter/combiner, polarization converted
Device, light beam circulator, collimation lens and reflecting mirror are sequentially arranged on the optical transport axis of the optical loop device；Described three
The light that optical fibre optical fibre head first end issues successively passes through polarization form converter, light beam ring after the beam splitter/combiner beam splitting
Road device and collimation lens, reflecting mirror described in directive, after reflecting mirror reflects, successively by the collimation lens, light beam circulator,
After the conjunction beam of polarization form converter and the beam splitter/combiner, back to the second end of the three optical fibre optical fibres head；Described three
The light that optical fibre optical fibre head second end issues successively passes through polarization form converter, light beam ring after the beam splitter/combiner beam splitting
Road device and collimation lens, reflecting mirror described in directive, after reflecting mirror reflects, successively by the collimation lens, light beam circulator,
After the conjunction beam of polarization form converter and the beam splitter/combiner, back to the third port of the three optical fibre optical fibres head.
2. three port optical loop device of compact according to claim 1, which is characterized in that the polarization form converter packet
Include faraday's rotation along the beam splitter/combiner to the half-wave plate heap and nonreciprocity being arranged between the light beam circulator optical path
Turn device.
3. three port optical loop device of compact according to claim 2, which is characterized in that the half-wave plate heap includes edge
The the first sub- half-wave plate heap and the second son that the optical transmission direction of the beam splitter/combiner to the Faraday rotator is connected in series
Wave-plate stack, the first sub- half-wave plate heap are spliced side by side by the first different half-wave plate of optical axis direction and the second half-wave plate,
The second sub- half-wave plate heap is spliced side by side by the different third half-wave plate of optical axis direction and the 4th half-wave plate, and described first
The splicing boundary line of half-wave plate and the second half-wave plate and the splicing boundary line of the third half-wave plate and the 4th half-wave plate are mutually perpendicular to.
4. three port optical loop device of compact according to claim 3, which is characterized in that the half-wave plate heap it is described
It is parallel that Shu Fangxiang is closed in the beam splitting of the boundary line direction of first sub- half-wave plate heap and the beam splitter/combiner, also simultaneously and fiber array
Direction arranged in a straight line it is vertical；
First half-wave plate, the second half-wave plate, third half-wave plate and the 4th half-wave plate optical axis angle should meet:
First relational expression:
Second relational expression:
Wherein, Θ 1 is the first half-wave plate optical axis angle, and Θ 2 is the second half-wave plate optical axis angle, and β 1 is third half-wave plate optic angle
Degree, β 2 are the 4th half-wave plate optical axis angle；Θ 1 takes -90 ° to 90 ° any one angle value, and k1, k2, l1, l2, m1, n1 take
Any one integer value.
5. three port optical loop device of compact according to claim 3, which is characterized in that the half-wave plate heap it is described
It is vertical that Shu Fangxiang is closed in the beam splitting of the boundary line direction of first sub- half-wave plate heap and the beam splitter/combiner, also simultaneously and fiber array
Direction arranged in a straight line it is parallel；
First half-wave plate, the second half-wave plate, third half-wave plate and the 4th half-wave plate optical axis angle should meet:
Third relational expression:
4th relational expression:
Wherein, α 1 is the first half-wave plate optical axis angle, and α 2 is the second half-wave plate optical axis angle, and γ 1 is third half-wave plate optic angle
Degree, γ 2 are the 4th half-wave plate optical axis angle；α 1 takes -90 ° to 90 ° any one angle value, and g1, g2, h1, h2, i1, j1 take
Any one integer value.
6. three port optical loop device of compact according to claim 1, which is characterized in that the beam splitter/combiner is inclined
Shake pattern displacement device.
7. three port optical loop device of compact according to claim 1, which is characterized in that the beam splitter/combiner is double
Light beam shifter and 45 degree of angle half-wave plate components；The double polarizing light beam displacement device include the first light beam shifter and
Second light beam shifter；45 degree of angle half-wave plates are placed in the first light beam shifter and second polarised light
Between beam displacement device, the six of the first light beam shifter, the second light beam shifter and 45 degree of angle half-wave plates
A light pass surface is parallel to each other, and the first light beam shifter and the second light beam shifter optical axis are directed toward and 45 degree of angles half
The light pass surface of wave plate mirror symmetry each other；The optical axis of 45 degree of angle half-wave plates is directed toward and the first light beam shifter
Optical axis direction projects into positive 45 degree of angles or minus 45 degree of angles in light pass surface.
8. three port optical loop device of compact according to claim 1, which is characterized in that the light beam circulator is inclined
Shake pattern displacement device.
9. three port optical loop device of compact according to claim 1, which is characterized in that the three optical fibre optical fibres head by
Capillary and three optical fiber being fixed in capillary form.
10. three port optical loop device of compact according to claim 1, which is characterized in that the end of three optical fiber
Portion is the large mode field diameter optical fiber of thermal expansion beam TEC optical fiber or one section of graded index of end welding in three optical fiber.
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| CN110824733A (en) * | 2019-11-18 | 2020-02-21 | 昂纳信息技术（深圳）有限公司 | Optical circulator |
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