CN106019489A - Collimating lens design structure applicable to optical interface assembly of optical module - Google Patents
Collimating lens design structure applicable to optical interface assembly of optical module Download PDFInfo
- Publication number
- CN106019489A CN106019489A CN201610591931.2A CN201610591931A CN106019489A CN 106019489 A CN106019489 A CN 106019489A CN 201610591931 A CN201610591931 A CN 201610591931A CN 106019489 A CN106019489 A CN 106019489A
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- Prior art keywords
- lens
- optical
- ceramic insertion
- insertion core
- design structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to the technical field of optical assemblies, and particularly relates to a collimating lens design structure applicable to an optical interface assembly of an optical module. According to the collimating lens design structure applicable to the optical interface assembly of the optical, structural innovation is carried out on a lens in the optical interface assembly, a light transmission portion is designed in a space-keeping manner and enabled to be not contacted with a ceramic ferrule, a contact surface is arranged in a non-working region of the lens so as to perform physical contact with the ceramic ferrule, and an effective working distance between a working surface of the lens and an optical fiber is ensured, so that the service life is greatly prolonged, and the safety is greatly improved.
Description
Technical field
The present invention relates to optical module technical field, a kind of collimating lens being applicable to optical module optical interface assemblies
Design structure.
Background technology
In the optical interface assemblies of optical device designs, if completed by lens with light source couples, outward in interface module
Portion's optical fiber is by the ferrule physical contact in band PC face to lens, and the defect of conventional design layout is that the hardness of ceramic insertion core is big
In glass lens, can wear and tear or scratch through multiple-contact rear lens end face, have a strong impact on logical light quality, even result in logical light complete
Full failure.Owing to this defect causes the optical interface assemblies of band lens to be used the most on a large scale, but the light of band lens
The advantage of interface module is easy for cleaning applicable low cost large-scale production, and the demand of industry is the most urgent.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve problem present in above-mentioned background technology, it is provided that Yi Zhongquan
The new collimating lens design structure being applicable to optical module optical interface assemblies, the hardness solving conventional ceramic lock pin is saturating more than glass
Mirror, can wear and tear or scratch through multiple-contact rear lens end face, have a strong impact on logical light quality, even results in logical light and falls flat,
And this defect causes the problem that the optical interface assemblies of band lens is used the most on a large scale.
The technical solution adopted for the present invention to solve the technical problems is: a kind of standard being applicable to optical module optical interface assemblies
Straight lens design structure, including lens and ceramic insertion core, one end that this lens arrangement contacts with ceramic insertion core for lens is carried out
Brand-new structure design, the logical light part of lens carries out empty avoiding design so that it is do not contact with ceramic insertion core, and at lens
Non-active area arranges contact surface and carries out physical contact with ceramic insertion core, and ensures effective working distance in lens functions face and optical fiber
From.
Preferably, in order to expand the scope of application, described lens lead to light part and can set according to actual optical design needs
It is calculated as Fresnel Lenses.
Preferably, in order to promote surface abrasion resistance, the part of described lens and ferrule physical contact is according to reality
Application demand can plate painting wear-resistant coating, prevents ceramic insertion core lens damage surface.
Preferably, in order to ensure coupling efficiency, described ceramic insertion core inner transverse is provided with optical fiber, and described pottery is inserted
Core end sphere summit is d with the spacing of lens apex, and described fiber core height is L, described ceramic insertion core spherical radius
For r, described r span is 7-25mm, and the mode field diameter of described optical fiber is MFD, and numerical aperture is NA, described optical fiber
The Gaussian Beam Coupling of outgoing to lens combination, described ceramic insertion core with the distance D formula of lens contact point is: D >=MFD+NA
×(d+L)。
Preferably, when lens surface is sphere, the geometrical relationship of described D with d is:
Preferably, in order to ensure that ferrule endface does not directly contact with lensed endface, described D also needs to meet following model
Enclose: D < ferrule diameter (LC, SC).
Preferably, the mode field diameter MFD=9.2 μm of described optical fiber, NA=0.14, PC sphere core height L≤50nm.
The invention has the beneficial effects as follows, a kind of collimating lens design knot being applicable to optical module optical interface assemblies of the present invention
Logical light part, by the lens in optical interface assemblies are carried out structural innovation, is carried out empty avoiding design so that it is not with pottery by structure
Porcelain lock pin contacts, and arranges contact surface in lens non-active area and carry out physical contact with ceramic insertion core, and ensures lens
Work surface and the effective working distance of optical fiber, be greatly promoted service life and safety.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
In figure: 1. lens, 2. ceramic insertion core, 3. optical fiber.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only with
The basic structure of the illustration explanation present invention, therefore it only shows the composition relevant with the present invention.
A kind of collimating lens design structure being applicable to optical module optical interface assemblies shown in Fig. 1, including lens 1 and pottery
Lock pin 2, one end that lens 1 contact with ceramic insertion core 2 is divided into two parts, wherein leads to light part and carries out empty avoiding design, rather than work
Being designed as region and ceramic insertion core 2 physical contact surface, non-active area can increase superhard film as required and strengthen lens 1 table
The anti-wear performance in face.
Preferably, in order to expand the scope of application, lens 1 lead to light part to be needed to can be designed as Fei Nie according to actual optical design
That lens, it is preferable that in order to promote surface abrasion resistance, the part of lens 1 and ceramic insertion core 2 physical contact is according to practical application request
Painting wear-resistant coating can be plated, prevent ceramic insertion core 2 lens damage 1 surface.Preferably, in order to ensure coupling efficiency, in ceramic insertion core 2
Portion is horizontally installed with optical fiber 3, and ceramic insertion core 2 end sphere summit is d with the spacing on lens 1 summit, and optical fiber 3 core height is L, pottery
Lock pin 2 spherical radius be r, r span be 7-25mm, the mode field diameter of optical fiber 3 is MFD, and numerical aperture is NA, optical fiber 3 outgoing
Gaussian Beam Coupling to lens 1 system, ceramic insertion core 2 with the distance D formula of lens 1 contact point be: D >=MFD+NA × (d+L),
Preferably, when lens 1 surface is sphere, the geometrical relationship of D with d is:
Preferably, in order to ensure that ceramic insertion core 2 end face does not directly contact with lens 1 end face, D also needs to meet following scope: D < ferrule
Diameter (LC, SC), it is preferable that the mode field diameter MFD=9.2 μm of optical fiber 3, NA=0.14, PC sphere core height L≤
50nm, a kind of collimating lens design structure of optical module optical interface assemblies that is applicable to of the present invention is by by optical interface assemblies
Lens 1 carry out structural innovation, logical light part are carried out empty avoiding design so that it is do not contact with ceramic insertion core 2, and thoroughly
Mirror 1 non-active area arranges contact surface and ceramic insertion core 2 and carries out physical contact, and ensures the effective of lens 1 work surface and optical fiber 3
Operating distance, is greatly promoted service life and safety.
Embodiment: ceramic insertion core 2 end sphere summit is d with the spacing on lens 1 summit, and fiber core height is L, pottery is inserted
Core 2 spherical radius is r (standard PC face r span is 7～25mm), sees Fig. 1, and when lens 1 surface is sphere, we are permissible
The geometrical relationship tentatively trying to achieve D with d is as follows: D=√ (4r (X-d)-" (X-d) " ^2) is 1.；1. formula is only from physical contact,
The relational expression obtained by geometrical calculation, for actual system, it would be desirable to pay close attention to the coupling efficiency of optical fiber and lens,
Being accomplished by by further the Calculation of Optical Path, and combine the span of property calculation D of optical fiber, the mode field diameter of optical fiber is
MFD (Mode Field Diameter), numerical aperture NA, the Gaussian Beam Coupling of fiber exit to lens combination, in order to ensure
Coupling efficiency, distance D of contact point need to meet equation below: D >=MFD+NA × (d+L) 2.；Meanwhile, in order to ensure ceramic insertion core
End face does not directly contact with lensed endface, and D also needs to meet following scope: D < ferrule diameter (LC, SC) 3.；For logical
The Corning SMF-28e optical fiber that letter field is conventional, the mode field diameter MFD=9.2 μm (@1310nm) of optical fiber, NA=0.14, PC
Sphere core height L≤50nm, 2. formula can be expressed as: D >=9.2+0.14 × (d+0.05) (μm) is 4.；By controlling d value,
Just can determine that the minima of apexes contact distance；Meanwhile, in conjunction with formula 1., control empty avoiding height, calculate ceramic insertion core summit
Radius of curvature, finally can determine that D value.
50 μm and the multimode fibre of 62.5 μm, the mode field diameter of optical fiber and core diameter phase are respectively for core diameter
Deng, here as a example by 50 μm multimode stepped-index optical fibers, optical fiber MFD=50 μm, NA=0.22, substitute into formula and 2. obtain: D >=50+
0.22×(d+0.05)(μm)⑤；In conjunction with above formula the most 5., we only need to determine d value, just can determine that the minimum value of D.Right
Determination in d value, it would be desirable to combine formula 1., considers lens radius R, empty avoiding height X and ceramic insertion core spherical radius
R, is defined its span.
Meanwhile, in order to cause lens 1 damage and produce cast when preventing ceramic insertion core 2 and glass lens 1 physical contact,
Near physical contact point, carry out superhard thin film protect, and territory, lens transparent zone not plated film, the most both ensure that lens led to
The effectiveness of light part, will not lens damage surface when in turn ensure that ceramic insertion core and lens physical contact.As it is shown in figure 1, can
With similar superhard and wear-resisting thin film such as plating nano superhard films.
1 type of lens that is mainly characterized by of this structure is by leading to light part and being suitable for and ceramic insertion core 2 physical contact portion；Should
The logical light part of lens 1 can ensure that the coupling mass with external fiber 3 meets the requirement of GR326.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff is complete
Entirely can carry out various change and amendment in the range of without departing from this invention technological thought.The technology of this invention
The content that property scope is not limited in description, it is necessary to determine its technical scope according to right.
Claims (7)
1. it is applicable to a collimating lens design structure for optical module optical interface assemblies, including lens (1) and ceramic insertion core (2),
It is characterized in that: one end that lens (1) contact with ceramic insertion core (2) is designed as two regions, and wherein the empty avoiding of territory, transparent zone designs also
And not with ceramic insertion core (2) physical contact, non-active area and ceramic insertion core (2) physical contact.
A kind of collimating lens design structure being applicable to optical module optical interface assemblies the most according to claim 1, its feature
It is: the logical light part of described lens (1) needs to can be designed as Fresnel Lenses according to actual optical design.
A kind of collimating lens design structure being applicable to optical module optical interface assemblies the most according to claim 1, its feature
It is: described lens (1) can plate painting wear-resistant coating with the part of ceramic insertion core (2) physical contact according to practical application request,
Prevention ceramic insertion core (2) lens damage (1) surface.
A kind of collimating lens design structure being applicable to optical module optical interface assemblies the most according to claim 1, its feature
It is: described ceramic insertion core (2) inner transverse is provided with optical fiber (3), described ceramic insertion core (2) end sphere summit and lens
(1) spacing on summit is d, and described optical fiber (3) core height is L, and described ceramic insertion core (2) spherical radius is r, described
R span is 7-25mm, and the mode field diameter of described optical fiber (3) is MFD, and numerical aperture is NA, described optical fiber (3) outgoing
Gaussian Beam Coupling to lens combination, described ceramic insertion core (2) with the distance D formula of lens (1) contact point be: D >=MFD+
NA×(d+L)。
A kind of collimating lens design structure being applicable to optical module optical interface assemblies the most according to claim 4, its feature
It is: the geometrical relationship of described D with d is:
A kind of collimating lens design structure being applicable to optical module optical interface assemblies the most according to claim 4, its feature
It is: described D also needs to meet following scope: D < ferrule diameter (LC, SC).
A kind of collimating lens design structure being applicable to optical module optical interface assemblies the most according to claim 4, its feature
It is: the mode field diameter MFD=9.2 μm of described optical fiber (3), NA=0.14, PC sphere core height L≤50nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610591931.2A CN106019489A (en) | 2016-07-25 | 2016-07-25 | Collimating lens design structure applicable to optical interface assembly of optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610591931.2A CN106019489A (en) | 2016-07-25 | 2016-07-25 | Collimating lens design structure applicable to optical interface assembly of optical module |
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|---|---|
| CN106019489A true CN106019489A (en) | 2016-10-12 |
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| CN201610591931.2A Pending CN106019489A (en) | 2016-07-25 | 2016-07-25 | Collimating lens design structure applicable to optical interface assembly of optical module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618491A (en) * | 2019-04-28 | 2019-12-27 | 中航光电科技股份有限公司 | Optical cross interconnection assembly |
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| JP2007199369A (en) * | 2006-01-26 | 2007-08-09 | Matsushita Electric Works Ltd | Optical connector |
| CN103268016A (en) * | 2013-05-31 | 2013-08-28 | 西安炬光科技有限公司 | Optical fiber coupling semiconductor laser unit homogenizing method and device |
| CN104216071A (en) * | 2013-05-30 | 2014-12-17 | 恩普乐股份有限公司 | Optical receptacle and optical module including the same |
| CN204028411U (en) * | 2014-07-25 | 2014-12-17 | 青岛中科光谱技术有限公司 | Laser diaphragm |
| CN104820274A (en) * | 2015-05-19 | 2015-08-05 | 昆明全波红外科技有限公司 | Optical athermalization long-wave infrared lens capable of being coated with DLC film |
| CN105402688A (en) * | 2014-09-04 | 2016-03-16 | 现代摩比斯株式会社 | Vehicle lamp lenses and manufacturing method for vehicle lamp lenses |
-
2016
- 2016-07-25 CN CN201610591931.2A patent/CN106019489A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007199369A (en) * | 2006-01-26 | 2007-08-09 | Matsushita Electric Works Ltd | Optical connector |
| CN104216071A (en) * | 2013-05-30 | 2014-12-17 | 恩普乐股份有限公司 | Optical receptacle and optical module including the same |
| CN103268016A (en) * | 2013-05-31 | 2013-08-28 | 西安炬光科技有限公司 | Optical fiber coupling semiconductor laser unit homogenizing method and device |
| CN204028411U (en) * | 2014-07-25 | 2014-12-17 | 青岛中科光谱技术有限公司 | Laser diaphragm |
| CN105402688A (en) * | 2014-09-04 | 2016-03-16 | 现代摩比斯株式会社 | Vehicle lamp lenses and manufacturing method for vehicle lamp lenses |
| CN104820274A (en) * | 2015-05-19 | 2015-08-05 | 昆明全波红外科技有限公司 | Optical athermalization long-wave infrared lens capable of being coated with DLC film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618491A (en) * | 2019-04-28 | 2019-12-27 | 中航光电科技股份有限公司 | Optical cross interconnection assembly |
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Application publication date: 20161012 |
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