CN104898308A - Magnetic rotation assembly capable of adjusting magnetic field and optical isolator - Google Patents
Magnetic rotation assembly capable of adjusting magnetic field and optical isolator Download PDFInfo
- Publication number
- CN104898308A CN104898308A CN201510284070.9A CN201510284070A CN104898308A CN 104898308 A CN104898308 A CN 104898308A CN 201510284070 A CN201510284070 A CN 201510284070A CN 104898308 A CN104898308 A CN 104898308A
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- Prior art keywords
- magnet
- magnet ring
- optically
- magnetic
- ring
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
-
- 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
- G02F1/09—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 based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—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 based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
-
- 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
- G02F1/09—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 based on magneto-optical elements, e.g. exhibiting Faraday effect
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention is suitable for the field of lasers and provides a magnetic rotation assembly capable of adjusting a magnetic field. The magnetic rotation assembly comprises at least one group of magnetic ring arrays. Each group of magnetic ring arrays comprises a first magnetic ring, a second magnetic ring and a third magnetic ring. The first magnetic ring, the second magnetic ring and the third magnetic ring of each group of magnetic ring arrays are stacked up in an axial direction and fixed. At least one Faraday device is arranged in a central hole of each magnetic ring array and fixed. The direction of a first magnetic line of each first magnetic ring is a radial direction pointing towards the outside from the center. The direction of a second magnetic line of each second magnetic ring points towards the axial direction from the left to the right. The direction of a third magnetic line of each third magnetic ring is a radial direction pointing towards the center from the outside. By adjusting axial distances or up-down distances among each first magnetic ring, each second magnetic ring and each third magnetic ring, an adjustment can be made to the magnetic field. The invention further discloses an optical isolator. Therefore, the magnetic rotation assembly capable of adjusting the magnetic field and the optical isolator helps to save cost and ensures ideal angle of rotation by making an adjustment to the magnetic field.
Description
Technical field
The present invention relates to field of lasers, particularly relate to a kind of magnet optically-active assembly and optoisolator of controlling magnetic field.
Background technology
Isolator is the optical device of the output terminal being applicable to superpower laser on a large scale, and it effectively prevent laser beam finished surface Returning beam to the impact of laser instrument.In isolator design, usually produce loss when specific corner makes light beam backpropagation by strong magnet and faraday's combination of devices comparatively large, i.e. high-isolation.Here mainly make use of faraday's device can make the light vector direction of light beam that certain angle rotation occurs under specific magnetic fields.The following formula of usual use characterizes this characteristic: θ=VBL, and wherein V is Verdet constant, and B is magnetic induction, and L is faraday's crystal length, the anglec of rotation that the light vector of faraday's crystal under magnetic induction B that θ is length L produces.The isolation index of isolator needs faraday rotation angle accurately just can reach higher isolation.
But in existing isolator, the most conventional magnet arrangement is fixing by the magnet ring radial direction that polylith is identical, then realizes certain corner, as shown in Figure 1A, 1B according to faraday's device length that the Intensity Design in magnetic field is suitable.This magnet optically-active assembly 200 structure is simple, is the generally general structure of conventional faraday's device.But this kind of CMF is limited to the magnet trade mark completely, therefore when using the magnetic field scheme of this kind, need longer faraday's device to meet optically-active angle requirement.Even if the spacing between adjustment magnet ring, changes of magnetic field is slow.Therefore, magnet and faraday's device 210 batch difference, may cause faraday rotation angle difference, finally causes isolation can not reach expection requirement.
Had manufacturers design Halbach array magnetic patch array to promote magnetic field afterwards, ensure that by adjusting the spacing increasing magnetic patch magnetic field and faraday's device coordinate and reach desirable optically-active angle, final realization reaches optimum state at the isolation of specific wavelength.As shown in Fig. 2 A, Fig. 2 B, square magnet, magnetic conduction iron and faraday's crystal that this kind of magnet optically-active assembly 300 structure is differed by three kinds of magnetic line of force directions form, and the distance being adjusted upper and lower two groups of magnet by physical construction makes the magnetic field of faraday's device 310 position obviously change.
The magnetic field intensity of described magnet optically-active assembly is comparatively large, and is easy to processing.But this kind of structure can make upper and lower two magnet assemblies spacing increase due to the thickness of faraday's crystal, now faraday's crystal front and rear part can not surround by magnet, field weakening.In order to ensure same optically-active angle, can be reached by the increase of faraday's device length, making cost significantly increase.
In summary, obviously there is inconvenience and defect in actual use in prior art, so be necessary to be improved.
Summary of the invention
For above-mentioned defect, the object of the present invention is to provide a kind of magnet optically-active assembly and optoisolator thereof of controlling magnetic field, object is the adjustment realizing magnetic field intensity, cost-saving.
To achieve these goals, the invention provides a kind of magnet optically-active assembly of controlling magnetic field, comprise: at least one group of magnet ring array, described magnet ring array comprises the first magnet ring, the second magnet ring and the 3rd magnet ring, described first magnet ring in described magnet ring array, described second magnet ring and described 3rd ring axial magnetic stack and fix, and at least one faraday's device is arranged in the center pit of described magnet ring array also fixing;
The radial direction in outside is pointed at first Shi Cong center, magnetic line of force direction of described first magnet ring, second magnetic line of force direction of described second magnet ring axially points to from left to right, 3rd magnetic line of force direction of described 3rd magnet ring is the radial direction from sensing center, outside, and by regulate described first magnet ring, axial distance between described second magnet ring and described 3rd magnet ring or up and down distance realize magnetic field adjustment.
According to magnet optically-active assembly of the present invention, described magnet optically-active assembly also comprises mechanical adjusting structure, and described mechanical adjusting structure regulates described first magnet ring, axial distance between described second magnet ring and described 3rd magnet ring; Or the distance up and down between two groups of magnet optically-active assemblies that described mechanical adjusting structure regulates described magnet ring array to be separated along diameter to obtain.
According to magnet optically-active assembly of the present invention, described first magnet ring of described two groups of magnet optically-active assemblies and the semi-ring of described 3rd magnet ring comprise two panels flat thin magnet, and described second magnet ring comprises two semi-rings separated.
According to magnet optically-active assembly of the present invention, described magnet ring array is Halbach magnet ring array.
According to magnet optically-active assembly of the present invention, described first magnet ring and described 3rd magnet ring comprise at least a slice flat thin magnet; And/or
The described flat thin magnet of described first magnet ring and described 3rd magnet ring is umbrella shape.
According to magnet optically-active assembly of the present invention, described faraday's device comprises single gyrotropi crystal or multiple rotatory device, the anglec of rotation of described light beam single or multiple by realizing presetting after described faraday's device.
According to magnet optically-active assembly of the present invention, the described center hole shape of described faraday's device and described magnet ring array matches; And/or
The shape of described center pit comprises circular or square.
According to magnet optically-active assembly of the present invention, described magnet ring array is fixed with outside magnetic conductor.
According to magnet optically-active assembly of the present invention, the described flat thin magnet of described first magnet ring, described 3rd magnet ring is adhesively fixed, and described magnet ring array and described magnetic conductor are adhesively fixed.
The present invention also provides a kind of optoisolator comprising magnet optically-active assembly as described above.
The present invention forms Halbach magnet ring array to realize higher magnetic field intensity by the present invention by the magnet optically-active assembly of design three different qualities, by the axial distance of regulating magnet or up and down distance realize the adjustment in magnetic field, cost-saving, ensure desirable optically-active angle.
Accompanying drawing explanation
Figure 1A and Figure 1B is the schematic diagram of the magnet optically-active assembly of prior art;
Fig. 2 A and Fig. 2 B is the schematic diagram of the Halbach magnet optically-active assembly of prior art;
Fig. 3 A is one of structural representation of the magnet optically-active assembly of controlling magnetic field of the present invention;
Fig. 3 B is the structural representation two of the magnet optically-active assembly of controlling magnetic field of the present invention;
Fig. 4 A is the schematic diagram of the first magnet ring of the magnet optically-active assembly of controlling magnetic field of the present invention;
Fig. 4 B is the schematic diagram of the second magnet ring of the magnet optically-active assembly of controlling magnetic field of the present invention;
Fig. 4 C is the schematic diagram of the 3rd magnet ring of the magnet optically-active assembly of controlling magnetic field of the present invention;
Fig. 5 A is one of magnet optically-active assembly preferred embodiment structural representation of controlling magnetic field of the present invention;
Fig. 5 B is the magnet optically-active assembly preferred embodiment structural representation two of controlling magnetic field of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In conjunction with illustrating, as shown in Fig. 3 A, Fig. 3 B, the invention provides a kind of magnet optically-active assembly 100 of controlling magnetic field, comprise: at least one group of magnet ring array, described magnet ring array comprises the first magnet ring 10, second magnet ring 20 and the 3rd magnet ring 30, described first magnet ring 10 in described magnet ring array, described second magnet ring 20 and described 3rd magnet ring 30 axially stack and fix, and at least one faraday's device 50 is arranged in the center pit 60 of described magnet ring array also fixing; In Fig. 4 A ~ 4C, dotted arrow is magnetic line of force direction in magnet.The radial direction in outside is pointed at the Shi Cong center, magnetic line of force direction of the first magnet ring 10, the magnetic line of force direction of described second magnet ring 20 axially points to from left to right, the magnetic line of force direction of described 3rd magnet ring 30 is the radial direction from sensing center, outside, and by regulate described first magnet ring 10, axial distance between described second magnet ring 20 and described 3rd magnet ring 30 or up and down distance realize magnetic field adjustment.
Further, described magnet optically-active assembly 100 also comprises mechanical adjusting structure (not shown), and described mechanical adjusting structure regulates described first magnet ring 10, axial distance between described second magnet ring 20 and described 3rd magnet ring 30; Or the distance up and down between two groups of magnet optically-active assemblies that described mechanical adjusting structure regulates described magnet ring array to be separated along diameter to obtain.During concrete enforcement, this mechanical adjusting structure can be body structure, described body structure has threaded hole at described first magnet ring 10, second magnet ring 20, the 3rd transportable axial direction two ends of magnet ring 30, carry out the distance between regulating magnet by bolt, described mechanical adjusting structure also can be replaced other form.
Described magnet ring array is Halbach magnet ring array, and the magnet arrangement of three different qualities forms Halbach magnet ring array to realize higher magnetic field intensity.Further, described first magnet ring 10 comprises at least a slice flat thin magnet with described 3rd magnet ring 30, it can also be multi-disc, shape can be adaptive flexibly, ensure that the magnetic line of force direction in the overall rear magnet ring of composition meets above-mentioned requirements, be preferably two panels in the present embodiment, described first magnet ring 10 is umbrella shape with the described flat thin magnet of described 3rd magnet ring 30, is combined into annulus by bonding.
Described faraday's device 50 comprises single gyrotropi crystal or multiple rotatory device, and after faraday's device 50 described in light beam single or Multiple through then out, described light beam realizes the anglec of rotation preset.
As shown in Fig. 3 A, Fig. 3 B, be arranged in described magnet ring array, faraday's device 50 comprises single gyrotropi crystal or multiple rotatory device.Meanwhile, the mating shapes of described faraday's device 50 and the center pit 60 of described magnet ring array, the shape of described center pit 60 comprises circular or square, and the shape of faraday's device 50 is square or cylindrical.Essentially, described magnet ring array is fixed with outside magnetic conductor 40, preferably magnetic conduction iron, in addition, optionally, the center pit 60 of described magnet ring array arranges the auxiliary enforcement of magnetic conduction construction (not shown), can test effect selection remove or replace according to reality.
In actual use, adjust the axial distance of the first magnet ring 10, second magnet ring 20 and the 3rd magnet ring 30 by designing specific mechanical adjusting structure, the magnetic induction in faraday's device 50 can change flexibly.Therefore, even if when batch wise differences appears in magnet and faraday's device 50, still can ensure to be adjusted to desirable optically-active angle.Especially, it is inner that this structure is wrapped in described magnet ring array faraday's crystal, makes full use of magnet optically-active assembly 100, makes magnetic field stronger, greatly reduce the length of faraday's device 50, provide cost savings.
As shown in FIGS. 3 A-4 C, magnet optically-active assembly 100 is made up of the first magnet ring 10, second magnet ring 20, the 3rd magnet ring 30, magnetic conductor 40 and faraday's device 50, the side view of the second magnet ring 20 in Fig. 4 B, shape and the first magnet ring 10 and the 3rd magnet ring 30 identical.
In another preferred embodiment, the semi-ring of the first magnet ring 10 of described two groups of magnet optically-active assemblies 100 comprises two panels flat thin magnet, and the second magnet ring 20 comprises two semi-rings separated.As shown in Fig. 5 A, Fig. 5 B, upper and lower two groups of magnet optically-active assemblies 100 are made up of the first magnet ring 10, second magnet ring 20, the 3rd magnet ring 30, form with magnetic conductor 40 and faraday's device 50.Wherein the detailed construction of the first magnet ring 10, second magnet ring 20, the 3rd magnet ring 30 as shown in Figure 5A, and the described flat thin magnet of described first magnet ring 10, described 3rd magnet ring 30 is adhesively fixed, and described magnet ring array and described magnetic conductor 40 are adhesively fixed.The excessively certain bonding agent of these three magnet rings and magnetic conduction Tie Tong is fixed together.Wherein the first magnet ring 10 and the 3rd magnet ring 30 all form by four umbrella shape magnet is bonding.Second magnet ring 20 is the magnet ring of the semicircle that two split.In actual use, adjust the distance up and down of two groups of magnet optically-active assemblies 100 by designing specific described mechanical adjusting structure, the magnetic induction in faraday's device 50 can change flexibly.Whereby, even if when batch wise differences appears in magnet and faraday's device 50, still can ensure desirable optically-active angle through adjustable range, make magnetic field stronger, greatly reduce the length of faraday's device 50, provide cost savings.
The present invention also provides a kind of optoisolator comprising magnet optically-active assembly as described above.
In sum, the present invention forms Halbach magnet ring array to realize higher magnetic field intensity by the magnet arrangement of three different qualities, by the axial distance of regulating magnet array or up and down distance realize the adjustment of magnetic field intensity, cost-saving, ensure desirable optically-active angle.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (10)
1. the magnet optically-active assembly of a controlling magnetic field, it is characterized in that, comprise: at least one group of magnet ring array, described magnet ring array comprises the first magnet ring, the second magnet ring and the 3rd magnet ring, described first magnet ring in described magnet ring array, described second magnet ring and described 3rd ring axial magnetic stack and fix, and at least one faraday's device is arranged in the center pit of described magnet ring array also fixing;
The radial direction in outside is pointed at first Shi Cong center, magnetic line of force direction of described first magnet ring, second magnetic line of force direction of described second magnet ring axially points to from left to right, 3rd magnetic line of force direction of described 3rd magnet ring is the radial direction from sensing center, outside, and by regulate described first magnet ring, axial distance between described second magnet ring and described 3rd magnet ring or up and down distance realize magnetic field adjustment.
2. magnet optically-active assembly according to claim 1, is characterized in that, described magnet optically-active assembly also comprises mechanical adjusting structure, and described mechanical adjusting structure regulates described first magnet ring, axial distance between described second magnet ring and described 3rd magnet ring; Or the distance up and down between two groups of magnet optically-active assemblies that described mechanical adjusting structure regulates described magnet ring array to be separated along diameter to obtain.
3. magnet optically-active assembly according to claim 2, is characterized in that, described first magnet ring of described two groups of magnet optically-active assemblies and the semi-ring of described 3rd magnet ring comprise two panels flat thin magnet, and described second magnet ring comprises two semi-rings separated.
4. magnet optically-active assembly according to claim 1, is characterized in that, described magnet ring array is Halbach magnet ring array.
5. magnet optically-active assembly according to claim 1, is characterized in that, described first magnet ring and described 3rd magnet ring comprise at least a slice flat thin magnet; And/or
The described flat thin magnet of described first magnet ring and described 3rd magnet ring is umbrella shape.
6. magnet optically-active assembly according to claim 1, is characterized in that, described faraday's device comprises single gyrotropi crystal or multiple rotatory device, the anglec of rotation of described light beam single or multiple by realizing presetting after described faraday's device.
7. magnet optically-active assembly according to claim 1, is characterized in that, the described center hole shape of described faraday's device and described magnet ring array matches; And/or
The shape of described center pit comprises circular or square.
8. magnet optically-active assembly according to claim 1, is characterized in that, described magnet ring array is fixed with outside magnetic conductor.
9. magnet optically-active assembly according to claim 8, is characterized in that, the described flat thin magnet of described first magnet ring, described 3rd magnet ring is adhesively fixed, and described magnet ring array and described magnetic conductor are adhesively fixed.
10. one kind comprises the optoisolator of magnet optically-active assembly as described in any one of claim 1 ~ 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510284070.9A CN104898308A (en) | 2015-05-28 | 2015-05-28 | Magnetic rotation assembly capable of adjusting magnetic field and optical isolator |
| PCT/CN2015/100306 WO2016188118A1 (en) | 2015-05-28 | 2015-12-31 | An optical isolator, a laser output head and a laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510284070.9A CN104898308A (en) | 2015-05-28 | 2015-05-28 | Magnetic rotation assembly capable of adjusting magnetic field and optical isolator |
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| Publication Number | Publication Date |
|---|---|
| CN104898308A true CN104898308A (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510284070.9A Pending CN104898308A (en) | 2015-05-28 | 2015-05-28 | Magnetic rotation assembly capable of adjusting magnetic field and optical isolator |
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| Country | Link |
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| CN (1) | CN104898308A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223710A (en) * | 2015-10-16 | 2016-01-06 | 深圳市创鑫激光股份有限公司 | A kind of optoisolator, Laser output head and laser equipment |
| CN105842882A (en) * | 2016-05-30 | 2016-08-10 | 宁波尼兰德磁业股份有限公司 | Magnetic concentrator |
| CN106024264A (en) * | 2016-07-15 | 2016-10-12 | 深圳市创鑫激光股份有限公司 | Magnet structure and opto-isolator |
| WO2016188118A1 (en) * | 2015-05-28 | 2016-12-01 | Maxphotonics Corporation | An optical isolator, a laser output head and a laser device |
| CN107942542A (en) * | 2017-12-31 | 2018-04-20 | 深圳市创鑫激光股份有限公司 | Optoisolator, laser export head, laser |
| CN110809729A (en) * | 2017-08-10 | 2020-02-18 | 浜松光子学株式会社 | Optical module and method for manufacturing optical module |
| CN110837189A (en) * | 2019-11-15 | 2020-02-25 | 深圳市光凡通讯技术有限公司 | Split type magnetic ring of optical isolator and dispensing process |
| EP3808457A1 (en) * | 2019-10-16 | 2021-04-21 | Chin-Ming Hsieh | Magnetizing device |
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| US5528415A (en) * | 1994-11-09 | 1996-06-18 | Duke University | Compact enhanced performance optical isolator using a faraday rotator |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016188118A1 (en) * | 2015-05-28 | 2016-12-01 | Maxphotonics Corporation | An optical isolator, a laser output head and a laser device |
| CN105223710A (en) * | 2015-10-16 | 2016-01-06 | 深圳市创鑫激光股份有限公司 | A kind of optoisolator, Laser output head and laser equipment |
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| CN110809729A (en) * | 2017-08-10 | 2020-02-18 | 浜松光子学株式会社 | Optical module and method for manufacturing optical module |
| US11385455B2 (en) | 2017-08-10 | 2022-07-12 | Hamamatsu Photonics K.K. | Optical module and method for manufacturing optical module |
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| CN107942542A (en) * | 2017-12-31 | 2018-04-20 | 深圳市创鑫激光股份有限公司 | Optoisolator, laser export head, laser |
| EP3808457A1 (en) * | 2019-10-16 | 2021-04-21 | Chin-Ming Hsieh | Magnetizing device |
| CN110837189A (en) * | 2019-11-15 | 2020-02-25 | 深圳市光凡通讯技术有限公司 | Split type magnetic ring of optical isolator and dispensing process |
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Application publication date: 20150909 |