CN209231569U - A kind of combined prism formula optical fiber polarisation beam splitter/combiner - Google Patents
A kind of combined prism formula optical fiber polarisation beam splitter/combiner Download PDFInfo
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- CN209231569U CN209231569U CN201920137959.8U CN201920137959U CN209231569U CN 209231569 U CN209231569 U CN 209231569U CN 201920137959 U CN201920137959 U CN 201920137959U CN 209231569 U CN209231569 U CN 209231569U
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- Prior art keywords
- prism
- collimator
- combined
- beam splitter
- optical fiber
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 30
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 239000005304 optical glass Substances 0.000 claims abstract description 14
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 13
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims abstract description 13
- QWVYNEUUYROOSZ-UHFFFAOYSA-N trioxido(oxo)vanadium;yttrium(3+) Chemical compound [Y+3].[O-][V]([O-])([O-])=O QWVYNEUUYROOSZ-UHFFFAOYSA-N 0.000 claims description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 239000008358 core component Substances 0.000 abstract description 2
- 230000007812 deficiency Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 15
- 239000011521 glass Substances 0.000 description 12
- 239000006185 dispersion Substances 0.000 description 8
- 230000010287 polarization Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005308 flint glass Substances 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Optical Elements Other Than Lenses (AREA)
Abstract
The utility model discloses a kind of combined prism formula optical fiber polarisation beam splitter/combiners, the optical fiber polarisation beam splitter/combiner includes covering shell, first collimator, second collimator and third collimator, the covering enclosure interior is packaged with combined prism, the combined prism includes the first prism and the second prism, first prism is triangular prism, second prism is square prism, two prism hypotenuse/facet surfaces are glued by air-gap form, the utility model proposes a kind of combined prism formula optical fiber polarisation beam splitter/combiner, it uses the method for micro-optics, compensate for the deficiency of pure fibre optic polarizing beam splitter, and its core component combined prism beam splitting angle of the optical fiber polarisation beam splitter/combiner is 90 °, it can be brought convenience to the design of light path system, convenient for the integrated of light path system, make system compact, miniaturization.Combined prism is made using the method that optical glass is combined with Yttrium Orthovanadate, the dosage of crystal is reduced, reduces the cost of manufacture of prism, the performance for keeping pure crystal prism excellent.
Description
Technical field
The utility model relates to optical technical fields, particularly relate to a kind of combined prism formula optical fiber polarisation beam splitting conjunction
Beam device.
Background technique
Optical fiber polarisation beam splitter/combiner integrates the function of being polarized beam splitting, polarization coupling, in fiber optic communication, Fibre Optical Sensor
Device, biomedical instrument, metrical instrument etc. have critically important application.The production technology of the fibre optic polarizing beam splitter of pure optical fiber
Extremely complex, it is very difficult for keeping the polarization direction of optical fiber constant during polarization-maintaining is drawn and bored, therefore yield rate is very
It is low, so the polarization beam apparatus price of pure optical fiber is high, it is hindered in fiber optic communication and the application of other field；In addition, traditional
Micro-optics fibre optic polarizing beam splitter and bundling device are composed of two pieces of wedge-shaped yttrium vanadate crystals, but the beam splitting of the beam splitter
Angle is smaller, is unfavorable for the integrated of system using being restricted in light path system.
Utility model content
Aiming at the shortcomings in the prior art, the technical problem to be solved by the present invention is to provide a kind of combined prisms
Formula optical fiber polarisation beam splitter/combiner.
In order to solve the above technical problems, the utility model is realized by following scheme: a kind of combined prism formula optical fiber is inclined
Shake beam splitter/combiner, which includes covering shell, first collimator, the second collimator and third collimation
Device, the covering enclosure interior are packaged with combined prism, and the combined prism includes:
First prism, first prism are the prism that section is obtuse triangle, that is, the first prism front/rear end is blunt
Angle gore, three sides between two obtuse triangle faces are square face, which is light pass surface, point
It is not: just oblique towards the right outgoing of the left incident end face of first collimator, the lower outgoing inclined-plane of lower-left direction and upper right direction
Face, the angle between the left incident end face and lower outgoing inclined-plane is obtuse angle；
Second prism, first prism are the right angle prism that section is right angled triangle, that is, the second prism front/rear end
For right angled triangle face, three sides between two right angled triangle faces are square face, wherein in three square faces
Be light passing with right outgoing inclined-plane left incident inclined-plane of the same size, just towards the right outgoing right-angle surface of second collimator
Face；
Left incident inclined-plane on right outgoing inclined-plane and second prism on first prism passes through air-gap structure
It is glued together, form a right angle terrace with edge structure；
Corner dimension between the left incident end face of first prism and right outgoing inclined-plane meets: incident light is quasi- from first
Straight device enters left incident end face, enters back into inside the first prism, then from right outgoing slant reflection to lower outgoing inclined-plane, finally from
Lower outgoing inclined-plane is refracted into third collimator, and the emergent light into third collimator is vertical with incident light.
Further, the combined prism includes one kind there are two types of structure, which is respectively:
The first structure, the first prism are the Yttrium Orthovanadate prism structure that yttrium vanadate crystal is formed, and the second prism is H-
The right-angle prism structure that ZLaF90 optical glass is formed；
Second of structure, the first prism are the Yttrium Orthovanadate prism structure that yttrium vanadate crystal is formed, and the second prism is H-
The right-angle prism structure that ZLaF92 optical glass is formed.
Further, the covering shell includes one kind of Al-alloy casing, Stainless Steel Shell.
Further, there are for positioning and the locating slot of fixed Combination prism for the covering enclosure interior.
Further, the first collimator is single mode collimator, one kind of collimator of PMF.
Further, second collimator is collimator of PMF.
Further, the third collimator is collimator of PMF.
Compared with the existing technology, the beneficial effects of the utility model are: the utility model proposes a kind of combined prism formula
Optical fiber polarisation beam splitter/combiner uses the method for micro-optics, compensates for the deficiency of pure fibre optic polarizing beam splitter, and the optical fiber
Its core component combined prism beam splitting angle of polarization beam splitter/combiner is 90 °, can be brought convenience to the design of light path system, just
In the integrated of light path system, make system compact, miniaturization.Also, the method production group combined using optical glass with Yttrium Orthovanadate
Prism is closed, the dosage of crystal is reduced, the cost of manufacture of prism is reduced with this, and be also able to maintain the excellent property of pure crystal prism
Energy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model optical fiber polarisation beam splitter/combiner；
Fig. 2 is the dispersion of refractive index curve and the main folding of Yttrium Orthovanadate ordinary light of the utility model H-ZLaF90 Glass optical glass
Penetrate rate dispersion curve figure；
Fig. 3 is dispersion of refractive index curve and the principal refractive index dispersion of Yttrium Orthovanadate ordinary light of the utility model H-ZLaF92 glass
Curve graph；
Fig. 4 is the first optical axis direction schematic diagram of the combined prism of the utility model embodiment 1；
Fig. 5 is the light path schematic diagram that the first optical axis direction of the utility model embodiment 1 is formed in combined prism；
Fig. 6 is second of optical axis direction schematic diagram of combined prism of the utility model embodiment 2；
Fig. 7 is the light path schematic diagram that second of optical axis direction of the utility model embodiment 2 is formed in combined prism.
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
The advantages of clearly and completely describing, enabling the utility model and feature are easier to be readily appreciated by one skilled in the art, thus to this
The protection scope of utility model is more clearly defined.Obviously, the utility model described embodiment is only
The utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the utility model protection
Range.
It is the specific structure of the utility model combined prism formula optical fiber polarisation beam splitter/combiner below.
Please refer to attached drawing 1, a kind of combined prism formula optical fiber polarisation beam splitter/combiner of the utility model, the optical fiber polarisation point
Beam bundling device includes covering shell 4, first collimator 1, the second collimator 2 and third collimator 3, inside the covering shell 4
It is packaged with combined prism, the combined prism includes:
First prism 5, first prism 5 are the prism that section is obtuse triangle, that is, 5 front/rear end of the first prism
For obtuse triangle face, three sides between two obtuse triangle faces are square face, which is light passing
Face is respectively: just towards the left incident end face of first collimator 1, the lower outgoing inclined-plane of lower-left direction and the right side of upper right direction
It is emitted inclined-plane, the angle between the left incident end face and lower outgoing inclined-plane is obtuse angle；
Second prism 6, first prism 6 are the right angle prism that section is right angled triangle, that is, 6 front and back of the second prism
End face is right angled triangle face, and three sides between two right angled triangle faces are square face, wherein this three rectangular
In face is with right outgoing inclined-plane left incident inclined-plane of the same size, just towards the right outgoing right-angle surface of second collimator 2
Light pass surface；
Left incident inclined-plane on right outgoing inclined-plane and second prism 6 on first prism 5 passes through air-gap knot
Structure is glued together, forms a right angle terrace with edge structure；
Corner dimension between the left incident end face of first prism 5 and right outgoing inclined-plane meets: incident light is from first
Collimator 1 enters left incident end face, enters back into inside the first prism, then from right outgoing slant reflection to lower outgoing inclined-plane, most
It is refracted into third collimator 3 from lower outgoing inclined-plane afterwards, the emergent light into third collimator 3 is vertical with incident light.
A kind of optimal technical scheme of the present embodiment: the combined prism includes one kind there are two types of structure, this two kinds knots
Structure is respectively:
The first structure, the first prism 5 are the Yttrium Orthovanadate prism structure that yttrium vanadate crystal is formed, and the second prism 6 is H-
The right-angle prism structure that ZLaF90 optical glass is formed；
Second of structure, the first prism 5 are the Yttrium Orthovanadate prism structure that yttrium vanadate crystal is formed, and the second prism 6 is H-
The right-angle prism structure that ZLaF92 optical glass is formed.
A kind of optimal technical scheme of the present embodiment: the covering shell 4 include Al-alloy casing, Stainless Steel Shell one
Kind.
A kind of optimal technical scheme of the present embodiment: there are for positioning and fixed Combination rib inside the covering shell 4
The locating slot of mirror.
A kind of optimal technical scheme of the present embodiment: the first collimator 1 be single mode collimator, collimator of PMF one
Kind.
A kind of optimal technical scheme of the present embodiment: second collimator 2 is collimator of PMF.
A kind of optimal technical scheme of the present embodiment: the third collimator 3 is collimator of PMF.
In two embodiments below, four-headed arrow 7 and short-term in Fig. 3 and Fig. 6 indicate to be oriented parallel to paper, point
Indicate direction perpendicular to paper, wherein label 8 is optical axis, and four-headed arrow 7 is also to indicate optical axis.In Fig. 4 and Fig. 7, wherein ng
For the refractive index of glass, noFor the principal refractive index of Yttrium Orthovanadate ordinary light.
Embodiment 1:
Such as Fig. 1, setting combined prism places groove in covering shell 4, and also sets up collimator connecting tube, collimator with
The fixed form of covering shell 4 can be welding or gluing.
As shown in Fig. 2, H-ZLaF90 glass is a kind of conventional optical window material, as a kind of optical glass, has and add
Work is flexible, low-cost feature, and optics is 400nm~2400nm, covering visible light and near infrared wavelength region through range,
Its most critical technology be ordinary light in dispersion of refractive index curve and yttrium vanadate crystal principal refractive index dispersion curve 650nm~
The coincidence of almost Perfect within the scope of the broadband of 2200nm.
As shown in figure 3, H-ZLaF92 glass is also that a kind of conventional optical window material has as a kind of optical glass
Flexible, low-cost feature is processed, optics is 400nm~2400nm, covering visible light and near-infrared wavelength model through range
It encloses, most critical technology is the principal refractive index dispersion curve of ordinary light in dispersion of refractive index curve and yttrium vanadate crystal in 600nm
The coincidence of almost Perfect is designed when with yttrium vanadate crystal prism arrangement by structure within the scope of the broadband of~3500nm, can
So that ordinary light is almost without passing through of selling off, rather than when ordinary light passes through prism boundary occur total reflection with incident light in 90 ° of angles
It is brought out optical path, to realize that right angle is polarized the function of beam splitting.When with yttrium vanadate crystal prism arrangement, designed by structure,
Can make ordinary light almost without passing through of selling off, rather than when ordinary light passes through prism boundary occur total reflection with incident light in 90 °
Angle is brought out optical path, to realize that right angle is polarized the function of beam splitting.
As shown in figs. 4-7, yttrium vanadate crystal is a kind of birefringent crystalline substance of Artificial Growth with desirable physical optical property
Body material；Optical glass is H-ZLaF90 glass and H-ZLaF92 glass, and H-ZLaF90, H-ZLaF92 are optical field according to state
GB/T903 is marked to the generally acknowledged number of the glass, wherein H represents environment-friendly type lead-free, arsenic, cadmium and other radioactive elements, ZLaF
Represent heavy-lanthanide flint glass；The direction of optical axis can be in yttrium vanadate crystal prism are as follows: and (a) is parallel to incident light pass surface, perpendicular to
The non-light passing right-angle surface of glass prism, (b) is parallel to incident light pass surface and perpendicular to paper.As shown in figure 4, two prisms light passing
Structure angle between face is respectively S1、S2、S3, relationship between each structure angle are as follows:
S3=S1(2)；
Wherein, neFor the principal refractive index of ordinary light non-in yttrium vanadate crystal.
Combined prism is combined using the yttrium vanadate crystal and glass of Artificial Growth in the device of the utility model design
Form can save 66% Yttrium Orthovanadate materials'use amount, and optical glass price is cheap more than Yttrium Orthovanadate, makes the system of single prism
It is compressed to as cost minimum；The Mohs' hardness of yttrium vanadate crystal can reduce mismachining tolerance close to glass as far as possible simultaneously；And
And the optical glass transparency range covering visible light and near infrared wavelength region used, therefore the combined prism can be applied completely
In visible light and near infrared band, the light passing range of optical fiber is covered.In combined prism the Mohs' hardness of yttrium vanadate crystal close to
Glass, mismachining tolerance is small, and the combined prism reduces the cost of raw material of production polarizing prism；In addition, combined prism formula
Its beam splitting angle of optical fiber polarisation beam splitting/bundling device is 90 degree, convenient for the integrated and miniaturization of system.
Embodiment 2:
In order to which guarantee prism assemblies is polarized beam splitting effect, the structure angle of the prism assemblies is set to S1=29.00 °, S2=
6.69 °, S3=29.00 °, the extinction ratio of the combined prism can achieve 10-4Magnitude.In use, non-polarized light passes through first
Become space directional light after collimator 1, becomes that two beam polarization directions are mutually perpendicular to and the direction of propagation is mutual by combined prism
Then light is pooled to back-propagation in polarization maintaining optical fibre by the second collimator 2 and third collimator 3 by vertical linearly polarized light；Or
The two orthogonal linearly polarized light in beam polarization direction of person becomes space directional light by the second collimator 2, third collimator 3, passes through
This two beams polarised light is combined into a branch of be pooled in optical fiber through first collimator 1 and transmitted backward by combined prism.
Above description is merely a prefered embodiment of the utility model, is not intended to limit the patent model of the utility model
Enclose, equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, or directly or
It connects and is used in other relevant technical fields, be also included in the patent protection scope of the utility model.
Claims (7)
1. a kind of combined prism formula optical fiber polarisation beam splitter/combiner, which includes covering shell (4),
Collimator (1), the second collimator (2) and third collimator (3), it is characterised in that: covering shell (4) enclosed inside has
Combined prism, the combined prism include:
First prism (5), first prism (5) are the prism that section is obtuse triangle, that is, the first prism (5) front and back end
Face is obtuse triangle face, and three sides between two obtuse triangle faces are square face, which is logical
Smooth surface is respectively: just towards the left incident end face of first collimator (1), the lower outgoing inclined-plane of lower-left direction and upper right direction
Right outgoing inclined-plane, the left incident end face and it is lower outgoing inclined-plane between angle be obtuse angle；
Second prism (6), second prism (6) are the right angle prism that section is right angled triangle, that is, before the second prism (6)
Rear end face is right angled triangle face, and three sides between two right angled triangle faces are square face, wherein three sides
In shape face with right outgoing inclined-plane left incident inclined-plane of the same size, just towards the right outgoing right angle of second collimator (2)
Face is light pass surface；
Left incident inclined-plane on right outgoing inclined-plane and second prism (6) on first prism (5) passes through air-gap knot
Structure is glued together, forms a right angle terrace with edge structure；
Corner dimension between the left incident end face of first prism (5) and right outgoing inclined-plane meets: incident light is quasi- from first
Straight device (1) enters left incident end face, enters back into inside the first prism, then from right outgoing slant reflection to lower outgoing inclined-plane, most
Third collimator (3) are refracted into from lower outgoing inclined-plane afterwards, the emergent light into third collimator (3) is vertical with incident light.
2. a kind of combined prism formula optical fiber polarisation beam splitter/combiner according to claim 1, it is characterised in that: the combination
Prism includes one kind there are two types of structure, which is respectively:
The first structure, the first prism (5) are the Yttrium Orthovanadate prism structure that yttrium vanadate crystal is formed, and the second prism (6) is H-
The right-angle prism structure that ZLaF90 optical glass is formed；
Second of structure, the first prism (5) are the Yttrium Orthovanadate prism structure that yttrium vanadate crystal is formed, and the second prism (6) is H-
The right-angle prism structure that ZLaF92 optical glass is formed.
3. a kind of combined prism formula optical fiber polarisation beam splitter/combiner according to claim 1, it is characterised in that: the covering
Shell (4) includes one kind of Al-alloy casing, Stainless Steel Shell.
4. a kind of combined prism formula optical fiber polarisation beam splitter/combiner according to claim 3, it is characterised in that: the covering
Shell (4) is internal, and there are for positioning and the locating slot of fixed Combination prism.
5. a kind of combined prism formula optical fiber polarisation beam splitter/combiner according to any one of claims 1-4, feature exist
In: the first collimator (1) is single mode collimator, one kind of collimator of PMF.
6. a kind of combined prism formula optical fiber polarisation beam splitter/combiner according to any one of claims 1-4, feature exist
In: second collimator (2) is collimator of PMF.
7. a kind of combined prism formula optical fiber polarisation beam splitter/combiner according to any one of claims 1-4, feature exist
In: the third collimator (3) is collimator of PMF.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920137959.8U CN209231569U (en) | 2019-01-25 | 2019-01-25 | A kind of combined prism formula optical fiber polarisation beam splitter/combiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920137959.8U CN209231569U (en) | 2019-01-25 | 2019-01-25 | A kind of combined prism formula optical fiber polarisation beam splitter/combiner |
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| Publication Number | Publication Date |
|---|---|
| CN209231569U true CN209231569U (en) | 2019-08-09 |
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ID=67510886
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| Application Number | Title | Priority Date | Filing Date |
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| CN (1) | CN209231569U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115657075A (en) * | 2022-05-25 | 2023-01-31 | 北京一径科技有限公司 | Beam combining device and manufacturing method thereof |
-
2019
- 2019-01-25 CN CN201920137959.8U patent/CN209231569U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115657075A (en) * | 2022-05-25 | 2023-01-31 | 北京一径科技有限公司 | Beam combining device and manufacturing method thereof |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 253000 No. 5880 Dongfanghong East Road, Dezhou Economic and Technological Development Zone, Shandong Province Patentee after: Shandong Yuehai Communication Technology Co.,Ltd. Address before: 253000 No. 5880 Dongfanghong East Road, Dezhou Economic and Technological Development Zone, Shandong Province Patentee before: DEZHOU LIGHTSTAR TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A combined prismatic fiber polarization beam splitter and combiner Effective date of registration: 20230228 Granted publication date: 20190809 Pledgee: Dezhou Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Yuehai Communication Technology Co.,Ltd. Registration number: Y2023980033696 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20190809 Pledgee: Dezhou Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Yuehai Communication Technology Co.,Ltd. Registration number: Y2023980033696 |