CN206788411U - Optical circulator - Google Patents
Optical circulator Download PDFInfo
- Publication number
- CN206788411U CN206788411U CN201720310389.9U CN201720310389U CN206788411U CN 206788411 U CN206788411 U CN 206788411U CN 201720310389 U CN201720310389 U CN 201720310389U CN 206788411 U CN206788411 U CN 206788411U
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- China
- Prior art keywords
- optical
- faraday rotator
- birefringece crystal
- optical circulator
- optical fiber
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Abstract
A kind of optical circulator is the utility model is related to, belongs to fiber optic communication field.The optical circulator includes：First optical fiber collimator,Second optical fiber collimator,And the optical element being arranged at therebetween forms,Optical element is followed successively by the first birefringece crystal according to placement order,First wave plate,First faraday rotator,The YVO4 angles of wedge pair,Second faraday rotator,Second wave plate,Second birefringece crystal,Optical element is positioned over magnet pedestal,For providing permanent-magnetic field to the first faraday rotator and the second faraday rotator,Metal base is replaced by using magnet pedestal,Directly the permanent-magnetic field needed for the first faraday rotator and the second faraday rotator can be provided by magnet pedestal,The hot spot of first optical fiber collimator and the second optical fiber collimator is modulated to 0.2mm,And the size of the first birefringece crystal and the second birefringece crystal is correspondingly adjusted to 1mm*1mm*5mm,Reduce the production cost of optical circulator,Miniaturization beneficial to light annular device and integrated.
Description
Technical field
Fiber optic communication field is the utility model is related to, more particularly to a kind of optical circulator.
Background technology
Optical circulator is a kind of multiport（Minimum three port）Irreversible passive device, its effect are with the strong of maximum
Light beam is transferred to adjacent port from a port by degree, while prevents light beam from a port a port transmission forward.Light
The operation principle of circulator is based on polarizing unrelated Faraday rotation effect.
Optical circulator makes optical signal to be transmitted along defined port order.With the continuous development of Fibre Optical Communication Technology,
It has turned into one of important devices in present and following optical fiber telecommunications system.A kind of three-port circulator as shown in figure 1, its
In, L1 is first port, and L2 is second port, and L3 is the 3rd port.When optical signal is from specified port input, in the devices
Can only along defined sequence spread, such as, optical signal from first port L1 input when, the order of propagation of optical signal is：L1→L2
→L3；When the transmission sequence change of optical signal, such as, optical signal transmits from second port L2 to first port L1, or, light letter
When number being propagated from the 3rd port L3 to second port L2, the loss of optical signal will be very big, thus can realize the isolation of optical signal.Light
The characteristics of non-reciprocity for learning circulator is realized using the Faraday effect of magneto-optic memory technique, and its principle and optical isolator are similar
Seemingly.Faraday effect refers under the magnetic fields parallel to optical propagation direction, the electromagnetic wave in dielectric material（Light wave）It is inclined
The face that shakes produces the phenomenon of rotation, and its direction of rotation and the direction of propagation of light are unrelated, that is, polarize unrelated.Light wave is inclined through first
Shaking turns into polarised light after piece, and after the polarised light is by Faraday polarization apparatus, polarization direction rotates 45 °, with the second polarizer thang-kng
Direction is parallel, it is allowed to passes through；When light opposite direction is transmitted, after Faraday polarization apparatus, the polarization direction of light and the first polarizer
Optical direction is vertical, it is impossible to passes through.The optical circulator structure of prior art is generally by optical fiber collimator A1 and A2, birefringece crystal
B1 and B2, YVO4 angle of wedge form to C, wave plate D1 and wave plate D2 and faraday rotator E1 and E2, magnet ring F1 and F2, such as Fig. 2 institutes
Show.
When a branch of injection light is in the interfacial refraction of the medium of isotropic, refraction light only has a branch of, thus follows refraction
Law.But when a branch of injection light is in the interfacial refraction of anisotropic crystal, it can typically produce two beams refraction light, both birefringence
Phenomenon.And always have in two separated beam refracted lights it is a branch of follow the law of refraction, no matter both orientation of incident beam, this beam
Always in the plane of incidence and the ratio between the sine at refraction angle and sine of incidence angle be constant, this beam reflects light and is referred to as refracted light
O light, even if another beam refraction light incidence angle is zero, and this beam refraction light also tends to not observe the law of refraction not in the plane of incidence,
It is referred to as non-ordinary light, e light.
In addition, a special direction in crystal be present, when light is propagated in crystal along this direction, do not occur
Birefringence.We term it the optical axis of crystal in this special direction in crystal.
The polarization state of o light and e light as caused by verifying birefringence with analyzer, it finds that o light and e light are all lines
Polarised light, and the electric vector of o light is vertical with the principal plane of o light, thus, always vertical with optical axis, the electric vector of e light is e's
In principal plane, thus it will change from the angle of optical axis with the different of the direction of propagation.
Due to birefringence and displacement can occur by the light of birefringece crystal, along be in optical circulator light path two-way or
Three road hot spots are with propagating, and the optical fiber collimator spot diameter that most importantly conventional circulator uses in addition is larger, in 0.36mm
Left and right, so that effective clear field of birefringece crystal requires larger, the crystalline substance of current conventional use of birefringece crystal
Body size is 2mm*2mm*7mm, thus it requires other optical element dimensions in whole optical circulator all increase accordingly, so
Make the covering size of whole optical circulator larger, its stock size is（￠ 5.5X50mm）.Due to producing the crystal of optical circulator
Material expensive in itself, the production cost of optical circulator is very high, and is unfavorable for optical communication system device miniaturization, integrated
Change development.
Utility model content
To solve relevant issues existing for prior art, the utility model provides a kind of optical circulator.
According to the one side of the utility model embodiment, there is provided a kind of optical circulator, including the first optical fiber collimator,
Two optical fiber collimators, and be arranged at optical element therebetween, the optical element according to placement order from left to right according to
Secondary is the first birefringece crystal, the first wave plate, the first faraday rotator, the YVO4 angles of wedge to, the second faraday rotator, second
Wave plate, the second birefringece crystal, the optical element are positioned on pedestal, and the pedestal is magnet pedestal, for described
One faraday rotator and second faraday rotator provide permanent-magnetic field.
Optionally, the hot spot of first optical fiber collimator and second optical fiber collimator is modulated to 0.2mm, and described
The size of one birefringece crystal and second birefringece crystal is 1mm*1mm*5mm.
Optionally, first birefringece crystal and first wave plate, second birefringece crystal and described second
Wave plate is deepened optical cement and is integrated respectively.
Optionally, first faraday rotator and the YVO4 angles of wedge are to, second faraday rotator and institute
The YVO4 angles of wedge are stated to be integrated to deepening optical cement respectively.
Optionally, the optical circulator is additionally provided with seal pipe, and the seal pipe is used to encapsulate the optical element.
Optionally, the size of the optical circulator is ￠ 3.5X38mm.
The technical scheme that embodiment of the present utility model provides can include the following benefits：
Metal base is replaced by using magnet pedestal, directly can provide the first faraday rotator by magnet pedestal
Required permanent-magnetic field when being worked with the second faraday rotator, the space-consuming of the optical element in optical circulator is reduced,
Reduce the procedure of processing of optical circulator；In addition, the utility model by the first optical fiber collimator used in optical circulator and
The hot spot of second optical fiber collimator is modulated to 0.2mm, and the size of the first birefringece crystal and the second birefringece crystal is corresponding
1mm*1mm*5mm is adjusted to, the effective area requirement of birefringent crystal material in focus ring row device can be reduced, saved ring of light row
The production cost of device so that the volume-diminished of light annular device, production procedure simplify, and are advantageous to the miniaturization of optical communication system equipment
With it is integrated.
It should be appreciated that the general description and following detailed description of the above are only exemplary, this can not be limited
Utility model.
Brief description of the drawings
Accompanying drawing herein is merged in specification and forms the part of this specification, show meet it is of the present utility model
Embodiment, and in specification together for explaining principle of the present utility model.
Fig. 1 is a kind of schematic diagram of three port circulator.
Fig. 2 is a kind of schematic diagram of optical circulator in the prior art.
Fig. 3 is a kind of structural representation for optical circulator that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in figure 3, the utility model embodiment provides a kind of optical circulator, including the first optical fiber collimator 10,
Two optical fiber collimators 20, and optical element composition therebetween is arranged at, the optical element is according to placement order from a left side
The first birefringece crystal 30, the first wave plate 40, the first faraday rotator 50, the YVO4 angles of wedge are followed successively by the 60, second method to the right side
Optical rotation plate 70, the second wave plate 80, the second birefringece crystal 90 are drawn, the optical element is positioned on pedestal 100, the pedestal
For magnet pedestal, for providing permanent magnetic to first faraday rotator 50 and second faraday rotator 70
.
Farad in optical circulator optical rotation plate need permanent-magnetic field could normal work, the ring of light that prior art provides
Row device generally processes rectangular opening on metal base, and the rectangular opening is used to place magnet ring, and faraday is provided by the magnet ring
Permanent-magnetic field needed for optical rotation plate work；Optical circulator provided by the utility model eliminates on the basis of existing optical circulator
The design of magnet ring, use instead magnet pedestal carry out alternative metals pedestal and farad is provided optical rotation plate work needed for permanent-magnetic field, can
The processing link of the processing link of rectangular opening and magnet ring on pedestal is saved, while has saved light required inside optical circulator
Learn the installing space of element.
In a kind of embodiment of optical circulator of the present utility model, first optical fiber collimator 10 and second light
The hot spot of fine collimater 20 is modulated to 0.2mm, first birefringece crystal 30 and second birefringece crystal 90 size
For 1mm*1mm*5mm.
The optical fiber collimator spot diameter that the circulator that prior art provides uses is larger, in 0.36mm or so, so that
Effective clear field of birefringece crystal requires larger, and the crystalline size of current conventional use of birefringece crystal is 2mm*
2mm*7mm, thus it requires other optical element dimensions in whole optical circulator all increase accordingly, so make whole ring of light row
The covering size of device is larger, and its stock size is（￠ 5.5X50mm）.
The spot diameter of first optical fiber collimator and the second optical fiber collimator provided by the utility model is compared with the prior art
The spot diameter of optical fiber collimator is obviously reduced in the circulator of offer so that optical signal is walked transversal in birefringece crystal
Face is also smaller, and the corresponding diminution of size of the first birefringece crystal and the second birefringece crystal can be achieved, reduce optical circulator pair
The effective area requirement of birefringent crystal material, has saved the production cost of optical circulator.
In a kind of embodiment of optical circulator of the present utility model, first birefringece crystal 30 and the first wave
Piece 40, second birefringece crystal 90 are deepened optical cement with second wave plate 80 and are integrated respectively.
In a kind of embodiment of optical circulator of the present utility model, first faraday rotator 50 and the YVO4
The angle of wedge is deepened optical cement to 60 with the YVO4 angles of wedge to 60, second faraday rotator 70 and is integrated respectively.
In a kind of embodiment of optical circulator of the present utility model, optical circulator is additionally provided with seal pipe, the sealing
Manage for encapsulating the optical element.
It should be noted that the material of seal pipe can be earthenware or glass tube.
In a kind of embodiment of optical circulator of the present utility model, the size of optical circulator is ￠ 3.5X38mm.
In summary, optical circulator provided by the utility model, metal base is replaced by using magnet pedestal, can be straight
Connected magnet pedestal and permanent-magnetic field required when the first faraday rotator and the work of the second faraday rotator is provided, reduced
The space-consuming of optical element in optical circulator, reduce the procedure of processing of optical circulator；In addition, the utility model is by light
The hot spot of first optical fiber collimator and the second optical fiber collimator used in circulator is modulated to 0.2mm, and two-fold by first
The size for penetrating crystal and the second birefringece crystal is correspondingly adjusted to 1mm*1mm*5mm, and it is brilliant can to reduce birefringence in focus ring row device
The effective area requirement of body material, has saved the production cost of optical circulator so that the volume-diminished of light annular device, production procedure
Simplify, be advantageous to the miniaturization of optical communication system equipment and integrated.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (6)
- A kind of 1. optical circulator, it is characterised in that：Including the first optical fiber collimator, the second optical fiber collimator, and it is arranged at two Optical element between person, the optical element are followed successively by the first birefringece crystal, first wave from left to right according to placement order Piece, the first faraday rotator, the YVO4 angles of wedge to, the second faraday rotator, the second wave plate, the second birefringece crystal, it is described Optical element is positioned on pedestal, and the pedestal is magnet pedestal, for first faraday rotator and described Two faraday rotators provide permanent-magnetic field.
- 2. optical circulator according to claim 1, it is characterised in that first optical fiber collimator and second optical fiber The hot spot of collimater is modulated to 0.2mm, and the size of first birefringece crystal and second birefringece crystal is 1mm* 1mm*5mm。
- 3. optical circulator according to claim 1, it is characterised in that first birefringece crystal and the first wave Piece, second birefringece crystal are deepened optical cement with second wave plate and are integrated respectively.
- 4. optical circulator according to claim 1, it is characterised in that first faraday rotator and the YVO4 wedges Angle is integrated to, second faraday rotator with the YVO4 angles of wedge to deepening optical cement respectively.
- 5. optical circulator according to claim 1, it is characterised in that the optical circulator is additionally provided with seal pipe, described Seal pipe is used to encapsulate the optical element.
- 6. optical circulator according to claim 1, it is characterised in that the size of the optical circulator is ￠ 3.5X38mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720310389.9U CN206788411U (en) | 2017-03-28 | 2017-03-28 | Optical circulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720310389.9U CN206788411U (en) | 2017-03-28 | 2017-03-28 | Optical circulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206788411U true CN206788411U (en) | 2017-12-22 |
Family
ID=60706653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720310389.9U Expired - Fee Related CN206788411U (en) | 2017-03-28 | 2017-03-28 | Optical circulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206788411U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363144A (en) * | 2018-05-09 | 2018-08-03 | 上海飞博激光科技有限公司 | A kind of high-power fiber circulator based on curved surface end caps |
| CN108710173A (en) * | 2018-07-04 | 2018-10-26 | 中科光电集团有限公司 | A kind of micro loop device structure and its packaging technology |
-
2017
- 2017-03-28 CN CN201720310389.9U patent/CN206788411U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363144A (en) * | 2018-05-09 | 2018-08-03 | 上海飞博激光科技有限公司 | A kind of high-power fiber circulator based on curved surface end caps |
| CN108710173A (en) * | 2018-07-04 | 2018-10-26 | 中科光电集团有限公司 | A kind of micro loop device structure and its packaging technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 528400 Zhongshan, Guangdong Torch Development Zone, 32 Jianye Road, A area, four floor six Patentee after: Zhongshan Hongxin Communication Technology Co., Ltd. Address before: 528437 No. three, three B, Jin Fukang science and Technology Park, No. 9 Fenghuang Road, Torch Development Zone, Zhongshan, Guangdong. Patentee before: Zhongshan Hongxin Communication Technology Co., Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171222 Termination date: 20210328 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |