CN101535854A - Surface warp resistant optical devices - Google Patents

Surface warp resistant optical devices Download PDF

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Publication number
CN101535854A
CN101535854A CNA2007800358058A CN200780035805A CN101535854A CN 101535854 A CN101535854 A CN 101535854A CN A2007800358058 A CNA2007800358058 A CN A2007800358058A CN 200780035805 A CN200780035805 A CN 200780035805A CN 101535854 A CN101535854 A CN 101535854A
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China
Prior art keywords
optical
optics
periphery
angle
boundary member
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CNA2007800358058A
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CN101535854B (en
Inventor
张达敏
李嵩阳
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Finisar Optoelectronic Communications (Shanghai) Co., Ltd.
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Finisar Corp
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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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Head (AREA)

Abstract

In at least one example, an optical component includes a central optical surface 12 proximate an optical axis, a peripheral portion extending radially from the central optical surface 12, and a stepped portion 14 between the central optical surface and the periph portion. The stepped portion 14 may be formed to raise the central optical surface 12 above the peripheral portion 13.

Description

The optical devices of surface warp resistant
Technical field
This present invention relates to optical devices, and relates to the optical devices of the feature that comprises the surface warp resistant that is used to improve optical devices.
Background technology
Optical fiber technology is used for the transmission via the data of communication network increasingly.Utilize the network of optical fiber technology to be called optical communication networks, and the characteristic feature of this network is high bandwidth, reliable high speed data transfer.
In order to communicate, use optics to send and receiving optical signals such as fiber optical transceiver or transponder via the optical communication networks of using optical fiber technology.Usually, fiber optical transceiver comprises the one or more optical sub-assemblies (" OSA ") with light converter.For example, transmitter optical subassembly (" TOSA ") has the light electric transducer that is used to send light signal, and receiver optical sub-assembly (" ROSA ") has the light electric transducer that is used for receiving optical signals.More particularly, TOSA receives electrical data signal, and this electrical data signal is converted to data optical signal, so that be transferred on the optic network.ROSA receives data optical signal from optic network, and the data optical signal that receives is converted to electrical data signal, so that further use and/or handle.TOSA and ROSA include the specific optical components that is used to carry out this function.
For example, typical TOSA comprises the optical transmitting set that is used for optical signal transmission is arrived optical fiber or optical waveguide, for example, and light emitting diode or laser diode.Optical transmitting set is usually by the block covering of partially transparent at least, and this block protection optical transmitting set allows optical transmitting set that optical signal transmission is arrived optical cable simultaneously.This block can comprise the lens that are used to make optical signal transmission focusing.
Typical R OSA comprises optical receiver, for example, and PIN photodiode or avalanche photodide (" APD ").Optical receiver is usually by the block covering of partially transparent at least, and this block protection optical receiver allows optical receiver from the optical cable receiving optical signals simultaneously.This block can comprise the lens that are used to make the optical signal transmission that receives from optical cable to focus on.
Lens and other optics are press fit among the corresponding OSA usually.When optics was press fit into retainer, force of compression can change the surface profile of this optics.If optics uses the soft or deformable material such as plastics, then this may be especially obvious.In addition, when OSA works, can make optics stand a large amount of heat energy.Heat energy makes optics expand with respect to retainer, causes producing force of compression owing to the expansion coefficient (CTE) of retainer and optics is different on optics, and this force of compression may cause producing stress on the surface of optics.The lip-deep stress of optics may cause the refractive index of material and/or birefraction to change.The position that such change can be by changing focused spot size, image and/or the quality of image influence effective work of optics.
Being used in the past reduces because the trial of the lip-deep stress of press fit and/or the caused optics of thermal expansion comprises uses retainer and the optics with similar CTE.Such method is normally unpractical, because may be difficult to obtain the restriction that such material and/or material select to be subjected at least in part product specification.Other trial comprises uses flexible (compliant) adhesive material that optics is attached to retainer.To small part be owing to may being expensive with obtaining and use the cost that additional process steps that these materials are associated and fringe cost cause this method.
Summary of the invention
In at least one example, a kind of optics comprises the central optical surface of contiguous optical axis, the periphery that extends from this central optical radial surface ground and the step portion between this central optical surface and this periphery.This step portion can be formed this central optical surface is protruded on this periphery.
In another example, a kind of optics comprises the optical surface that has from the optical axis that wherein extends through, the periphery adjacent with this optical surface and the boundary member adjacent with this periphery.In this example, at least a portion in this periphery limits recess between this boundary member and this optical surface.
In another example, a kind of optical sub-assembly comprises optical-mechanical retainer and the optics that is fixed to this optical-mechanical retainer.This optics can comprise the central optical surface of contiguous optical axis, the periphery that extends from this central optical radial surface ground and the step portion between this central optical surface and this periphery, wherein, this step portion is formed this central optical surface is protruded on this periphery.
These and other feature of the present invention will from describe below with claims become clearer, perhaps can understand by such the present invention of enforcement as mentioned below.
Description of drawings
For further clarification some aspect of the present invention, will come the present invention is carried out more concrete description with reference to disclosed specific embodiment of the present invention in the accompanying drawings.Should be appreciated that these accompanying drawings only illustrate example embodiment of the present invention, therefore be not considered as restriction scope of the present invention.By using accompanying drawing to come to describe more specifically, in more detail and explain each side of the present invention, in the accompanying drawings:
Figure 1A to 1D illustrates the optics according to an example;
Fig. 2 illustrates the optics that matches with the optical-mechanical retainer;
The optical sub-assembly of the open example of Fig. 3 A;
The each side of the optical sub-assembly of the open Fig. 3 A of Fig. 3 B;
Fig. 4 A openly is configured to the optical devices of the back-reflections in the optical sub-assembly of control chart 3A and 3B; And
Fig. 4 B openly is used for the each side of method for designing of the optical devices of Fig. 4 A.
Embodiment
Be provided in this article reducing because caused by factors force of compression such as press fit, thermal expansion and/or thermal shrinkage and device, the system and method for the pressure that on the surface of optics, produces.In at least one example, optics comprises at least one optical surface, periphery and boundary member.This optics has at least one step portion between periphery and optical surface, described at least one step portion makes optical surface protrude with respect to periphery, protrudes optical surface thereby form.This structure can make the stress isolation on the other parts of protruding optical surface and acting on this protrusion optical surface open at least in part.Boundary member is protruded with respect to periphery and protrusion optical surface, thereby between protrusion optical surface and boundary member, form embossment.This structure can allow boundary member not only to provide axial protection but also provide radially protection for the protrusion optical surface.
Can implement to have the optics that protrudes optical surface in various OSA, described OSA comprises any OSA that is integrated in optoelectronic transceivers and the transponder module.In addition, in any OSA, can implement to have the optics that protrudes optical surface, and not be subjected to the influence of data rate, operation wavelength, transmission standard, skin temperature scope, connector type, module type and OSA service range.
Figure 1A to 1D illustrates optics 10.Specifically, Figure 1A illustrates the top skeleton view, and Figure 1B illustrates end skeleton view, and Fig. 1 C illustrates planimetric map, and Fig. 1 D illustrates the sectional view of the intercepting from Fig. 1 C along section A-A.For ease of reference, optics 10 is described to roughly concentric optics, this optics is concentric about axle 11, wherein, axle 11 can with the optical axis alignment of such assembly: this optics is the part of this assembly, therefore, axial dimension can be roughly corresponding to depth dimensions, and radial dimension can be roughly corresponding to width dimensions.In addition, for ease of reference, will a side of optics 10 be described.This description can be equally applicable in the opposite side of optics 10.In addition, though show the optical surface (angled opticalsurface) of inclination, optics can comprise smooth surface, spherical surface and/or aspheric surface, to form the optical devices of lens, prism or other type.
Shown in Fig. 1 D, optics 10 generally includes the protrusion optical surface 12 of contiguous core, for example, and the lens surface of protrusion or the prism surface of protrusion.Periphery 13 is shown as from protruding optical surface 12 and radially extends.In at least one example, protruding optical surface 12 can separate by step portion 14 protrusions and with periphery 13.Therefore, step portion 14 provides axial separation between protrusion optical surface 12 and periphery 13.
In at least one example, optics 10 also comprises boundary member 15.Boundary member 15 can laterally, axially extend from periphery 13.Specifically, the adjusted size of boundary member 15 can be protruded outside the optical surface 12 for axially extending to, thereby between protrusion optical surface 12 and boundary member 15, be produced groove.
Boundary member 15 extends to and protrudes outside the optical surface 12, can allow boundary member 15 protections to protrude optical surface 12.Boundary member 15 radially extends to outside the periphery 13, and the structure of periphery 13 and step portion 14, can reduce thermal stress and/or the mechanical stress Effect on Performance to optics 10 by the stress on the minimizing protrusion optical surface 12.This stress may be owing to the force of compression and/or the heating power that exist when the optics that is fixed to optical sub-assembly is worked cause.
Fig. 2 illustrates the sectional view of the optics 10 that is fixed to optical-mechanical retainer 20.Optics 10 can and/or be attached to the optical-mechanical retainer by press fit.Stress in the optics may be to cause owing to the size between optical-mechanical retainer 20 and the optics 10 is different to small part.For example, optics 10 being press fit in the process of optical-mechanical retainer 20, mechanical stress may appear.Specifically, when the external dimensions of optics 10 during, can realize press fit less times greater than the inside dimension of optical-mechanical retainer 20.Such size difference causes producing force of compression, and this force of compression is fixed on optical devices the position and the orientation of expectation with respect to optical-mechanical retainer 20.
When to optics 10 and/or 20 heating of optical-mechanical retainer, thermal stress may appear.Specifically, when light passed through optics, a part of light may be absorbed by optics 10.When light was absorbed, optics 10 heating were also expanded.Optical-mechanical retainer 20 can not absorb so much light, and/or can be made by such material: for given temperature difference, this material expands to such an extent that lack than optics.Other heat condition can make optical-mechanical retainer 20 cool off quickly and/or shrink than optics 10.The difference of these and other can cause optical-mechanical retainer 20 less than optics 10.The possibility of result is to produce additional force of compression on optics 10, thereby causes producing stress in optics 10.
The structure of optics 10 can reduce this stress to protruding the influence of optical surface 12.Specifically, when optics 10 was for example compressed by above-mentioned optical-mechanical retainer, this stress is negative margin part 15 at first.Boundary member 15 with protrude optical surface 12 groove of being separated by.As a result, be delivered to the Stress Transfer of other parts of optics 10 to periphery 13 from boundary member 15.
Can may be subjected to the influence of step portion 14 from the stress that periphery 13 is delivered to the remainder of optics.Specifically, the inner boundary (inner limit) that can concentrate on step portion 14 from the stress of periphery is located or in its vicinity.This may partly be because the geometry of this part is caused in the sudden change at step portion 14 places.No matter what reason, the structure decrease of optics 10 act on the stress that protrudes on the optical surface 12.
The structure of optics helps to reduce the stress on the optical surface, and helps standing that temperature raises, temperature reduces and/or owing to realizing uniform more surface deformation during force of compression that press fit or other operation cause.Therefore, no matter what stress riser is, the structure of optics all helps to reduce the stress on the optical surface, and helps to realize surface deformation more uniformly.
The open example OSA 100 of Fig. 3 A and 3B.OSA 100 is transmitter optical subassembly (TOSA).Yet, owing to example embodiment of the present invention can be incorporated among TOSA or the ROSA, so OSA 100 can be receiver optical sub-assembly (ROSA).
OSA 100 comprises cylindrical shell 102.Cylindrical shell 102 is connected with TO-Can 104.Shown in Fig. 3 B, TO-Can 104 partly is arranged in the cylindrical shell 102.TO-Can 104 comprises the top cover (header) 106 with many electrical leads 108, and described many electrical leads 108 are configured to the parts of TO-Can104 are electrically connected with the printed circuit board (PCB) and the interlock circuit (not shown) of optoelectronic transceivers that is equipped with OSA 100 or transponder module.Lead-in wire 108 makes it possible to electric power and electric signal is transferred to TO-Can 104 and from TO-Can 104 transmission electric powers and electric signal.TO-Can104 also comprises the block 110 that is connected with top cover 106.Block 110 forms airtight vacuum (-tight) housing 112, is used for various TO-Can parts, as other place herein is disclosed.
TO-Can 104 also optionally comprises the lens 114 that partly are arranged in the block 110.Lens 114 shown in Fig. 3 A and the 3B comprise protrusion optical surface, periphery and boundary member.Between boundary member and protrusion optical surface, limit the embossment part.Although shown lens 114 are globe lenss, lens 114 can be the lens of other type, include but not limited to packaged lens.Alternatively be, under the situation of 110 appropriate section light-permeable of blocking a shot at least, can remove lens 114, perhaps, can be with substituting lens with block 110 windows that match.
Example OSA 100 comprises first chamber 116 with second chamber, 117 open communication, and these two chambeies are limited by cylindrical shell 102.First chamber 116 and second chamber 117 can be vacuum, perhaps can comprise a certain gas, for example air.OSA 100 also comprises the optical devices 200 that are used to control back-reflections.Below in conjunction with Fig. 4 A and 4B optical devices 200 are discussed in further detail.In the present embodiment, optical devices 200 are arranged in second chamber 117.OSA 100 also comprises the 3rd chamber 118 that is limited by cylindrical shell 102.The 3rd chamber 118 is relative with second chamber 117.Contiguous the 3rd chamber 118 is port ones 20.Port one 20 is limited to an end of cylindrical shell 102.Port one 20 is configured to receive the optical conenctor such as ferrule, so that help optical fiber and OSA 100 couplings.In another embodiment, port one 20 can be configured to receive the optical connector corresponding to optical waveguide, so that help optical waveguide and OSA 100 couplings.
As mentioned above, TO-Can comprise various parts.For example, the TO-Can104 of OSA 100 comprises the transmitter 122 that is arranged in the vacuum (-tight) housing 112.Transmitter 122 can be the transmitter of any kind, includes but not limited to any transmitter of listing in annex A.For example, transmitter 122 can be fabry-Perot type laser, Distributed Feedback Laser or other marginal mode emissive source (emitter).Transmitter 122 can also be VCSEL or LED.It is corresponding light signal 150 with the electrical signal conversion by lead-in wire 108 supplies that transmitter 122 uses the electric power by lead-in wire 108 supplies.
In the example of Fig. 3 A and 3B, OSA 100 is configured to like this: the light signal 150 that is produced by transmitter 122 enters vacuum (-tight) housing 112 and the lens 114 by light signal 150 is focused on.Then, light signal 150 passes through first chamber 116, by optical devices 200, and by the 3rd chamber 118, and entry port 120.When the optical connector (not shown) with optical cable was inserted into port one 20, light signal 150 can enter optical cable, thereby was transported to another parts by optical cable.When light signal 150 passed through optical devices 200, optical devices 200 made light signal 150 crooked one or many before it enters optical fiber or waveguide.Inter alia, bending reduces the performance degradation of the transmitter 122 that causes owing to back-reflections or avoids this performance degradation like this.
Continuation is with reference to Fig. 3 A and 3B, and, now also with reference to Fig. 4 A, the each side of example optical device 200 openly in further detail.Can utilize various devices to carry out the function of example optical device 200.Optical devices 200 comprise the protrusion optical surface.Optical devices 200 also comprise periphery and boundary member.Between boundary member and protrusion optical surface, limit the embossment part.Therefore, the structure of example optical device 200 comprises only example structure embodiment of the device that is used to control back-reflections.
Therefore, should be appreciated that, only come to disclose this structure embodiment in this article by way of example, in any case but this structure embodiment should not be interpreted as the restriction to scope of the present invention.Or rather, similarly can use any other structure or the textural association that is effective to implement function disclosed herein.For instance, in some embodiment of example OSA disclosed herein, can use can twice crooked light signal any light transmission device substitute optical devices 200.
Example optical device 200 can with cylindrical shell 102 discretely or form.In addition, according to the needs of concrete application, optical devices 200 can be by different material forms with cylindrical shell 102 identical materials or with cylindrical shell 102.Optical devices 200 can be formed by any light transmissive material that includes but not limited to any transparent glass or plastics.For example, one or two in optical devices 200 and the cylindrical shell 102 can be by Ultem
Figure A200780035805D0013171754QIETU
Plastics form.In order to allow light signal 150 by optical devices 200, the material that forms optical devices 200 must be a printing opacity.
Optical devices 200 comprise two inclined surfaces, and in order to penetrate from OSA 100, light signal 150 must be by these two inclined surfaces." inclination " used herein is meant and the longitudinal axis of the light path that limits that for example the OSA/ optical axis 152, the off plumb surface.OSA/ optical axis 152 be defined as the point of the lip-deep generation light signal 150 of transmitter 152 and light signal 150 finally be inducted into wherein optical fiber or the path between the central point on the optical waveguide, as Fig. 4 B is disclosed.OSA/ optical axis 152 among the example OSA 100 is also consistent with the longitudinal axis of OSA 100.For example, the first surface 202 of optical devices 200 and second surface 204 are angled with respect to OSA/ optical axis 152.
In the inclined surface 202 and 204 one or two can be the plane, sphere or aspheric, perhaps can be their any combination.When in inclined surface 202 and 204 one or two when being sphere or aspheric, the axle of spherical surface can with inclined surface 202 and 204 one-tenth desired angle.In some applications,, use spherical surface or the aspheric surface can compound lens 114 and the function of (one or more) inclined surface, thereby eliminate needs lens 114 in inclined surface 202 and 204 one or two.Make up above-mentioned one or more aspect and can make it possible to the fine adjustment table facial contour, thereby realize that best spot size, coupling efficiency, back-reflections reduce and quasi-stability.
Optical devices 200 are arranged in the cylindrical shell 102, thereby light signal 150 must be by optical devices 200, so that penetrate from OSA 100 by port one 20.Specifically, light signal 150 at first is incident on the first surface 202, penetrates from optical devices 200 by second surface 204 then.In an example embodiment, first inclined surface 202 can selectively be coated with antireflecting coating, reduces during by first inclined surface 202 or avoids back-reflections when light signal 150 helping.
Usually, making the amount of light signal 150 bendings by optical devices 200 is functions of the surperficial angle of first surface 202 and second surface 204.Therefore, can realize various desired effects by in the surperficial angle that changes first surface 202 and second surface 204 one or two.
When light signal 150 passed through first inclined surface 202, the angle of first inclined surface 202 made light signal 150 spend with respect to OSA/ optical axis 152 bendings " λ ".Similarly, when light signal 150 passed through second inclined surface 204, the angle of second inclined surface 204 made light signal 150 with respect to the angular bend of OSA/ optical axis 152 with " ω " degree, thereby enters any optical fiber that inserts in the port 120.Usually, in the numerical aperture of any optical fiber of angle " ω " in being inserted into port one 20.
Referring now to Fig. 4 B, the each side of the method for designing of exemplary optical devices 200 is disclosed.For ease of reference, optical surface is shown as smooth.Should be appreciated that optical devices can comprise protrusion optical surface, periphery and boundary member, wherein, step portion is being protruded qualification embossment part between optical surface and the boundary member.Generally speaking, Fig. 4 B discloses the optical cable 210 that is positioned at such position with respect to optical devices 200, if that is: optical cable 210 is inserted in the port one 20 of OSA 100 of Fig. 3 A to 4A, then this optical cable 210 just is in this position.Fig. 4 B discloses first apart from d 1With second distance d 2First apart from d 1Distance between the point that is defined as that light signal 150 enters by first surface 202 respectively and penetrates by second surface 204 along the y axle.Second distance d 2Be defined as the distance between the point on the face 206 that point that light signal 150 penetrates by second surface 204 and light signal 150 be incident on optical fiber 208 along the y axle.Optical fiber 208 can comprise the part of the optical cable 210 that is inserted in the port one 20, as Fig. 3 B and 4A are disclosed.In an example embodiment, first apart from d 1Be approximately equal to second distance d 2Yet,, in other embodiments, first apart from d 1With second distance d 2Unequal.
Continuation is with reference to Fig. 4 B, and angle beta (beta) is first inclined surface 202 and in fact perpendicular to the angle between the virtual surface of OSA/ optical axis 152.The size of the angle beta of first inclined surface 202 makes and almost or at all do not produce back-reflections from guiding to transmitter 122 that light signal is returned when light signal 150 is incident on first inclined surface 202.Angle [alpha] (Alpha) is second inclined surface 204 and perpendicular to the angle between the virtual surface of OSA/ optical axis 152.In an example embodiment, angle beta and α are unequal, yet in other embodiments, angle beta and α are equal in fact each other.
As mentioned above, light signal 150 is respectively the function of the surperficial angle [alpha] of the surperficial angle beta of first surface 202 and second surface 204 by the degree of optical devices 200 bendings.The disclosed angle θ of Fig. 4 B 1-θ 5(Tai Ta-following footnote 1 to Tai Ta-following footnote 5) is finally by angle beta and α and to form the material of optical devices 200 definite.The relative value of angle beta and α is partly by to the center of the optical fiber 208 that will be incident on contiguous optical cable 210 and be in the decision that needs of light signal 150 on the surface 206 in the numerical aperture of optical fiber 208.Normal 212,214,218 and 220 among Fig. 2 B is all perpendicular to one in the inclined surface 202 or 204 of optical devices 200.
As Fig. 2 B is disclosed, be used for determining that a kind of method of the angle beta of plane surface and α can be by following three equation expressions:
1)sinθ 1＝n*sinθ 2
2)sinθ 4＝n*sinθ 3
3)-θ 1+θ 2-θ 3+θ 4＝θ 5
Wherein:
N is the refractive index of the material of construction of optical device 200;
θ 1Be by light signal 150 before first inclined surface 202 and the angle between the normal 212 at light signal 150;
θ 2Be by light signal 150 after first inclined surface 202 and the angle between the normal 212 at light signal 150;
θ 3Be after light signal 150 passes through first inclined surface 202 but light signal 150 before light signal 150 passes through second inclined surface 204 and the angle between the normal 214;
θ 4Be by light signal 150 after second inclined surface 204 and the angle between the normal 214 at light signal 150; And
θ 5Be by after second inclined surface 204 but light signal 150 pass through the surface 206 of optical fiber 208 of optical cable 210 at light signal 150 before and the angle between the OSA/ optical axis 152 at light signal 150.
For example, use above-mentioned formula, if angle θ 1=7 ° and optical devices 200 are by the Ultem with refractive index of 1.63
Figure A200780035805D0013171754QIETU
Form, then angle θ 2=4.3 °, angle θ 3=8 °, angle θ 4=12.7 °, angle θ 5=2 °.In addition, angle beta=7 °, angle [alpha]=11 °.Although optical devices 200 are configured to make angle θ 5Greater than 0 °, but optical devices 200 also are configured to guarantee angle θ 5Be not more than the numerical aperture of the optical cable 210 that is connected with OSA100.Term " numerical aperture " is meant in the optical fiber 208 that can enter and be limited in optical cable 210 maximum angle that longitudinal axis became with optical fiber 208 as used herein.In this example, the longitudinal axis of optical fiber 208 is corresponding to OSA/ optical axis 152.
As other place herein is disclosed, in the time of on the one or more surfaces in light signal 150 is incident on OSA 100, can produce back-reflections in some cases.For example, when a part of light signal 150 enters optical fiber 208 by surface 206 reflections of the optical fiber 208 of optical cable 210 rather than by surface 206, can form back-reflections 222.Yet, because light signal 150 is with angle θ 5Be incident on the surface on 206 the fact and cause any back-reflections 222 with angle θ 6Guide to optical devices 200.Angle θ 6It is the angle between back-reflections 222 and the OSA/ optical axis 152.In an example embodiment, angle θ 6Equal angle θ in fact 5As disclosed in the example of Fig. 4 B, when back-reflections 222 was passed through second inclined surface 204 and first inclined surface 202, it was bent twice.When with initial angle θ 6Effect in conjunction with the time, bending causes the last direction of propagation 224 of back-reflections 222 like this, wherein, the direction of propagation 224 is away from transmitter 122, as Fig. 4 B is disclosed.For example, if light signal 150 is incident on the surface 206 with 2 ° angle of the longitudinal axis of stray fiber 208, then the last direction of propagation 224 of back-reflections 222 may be 5 ° of longitudinal axis of stray fiber 208.
Therefore, the example embodiment of optical devices disclosed herein can be controlled the negative effect of back-reflections with some modes.When optical devices were attached among the TOSA, first inclined surface of these optical devices made any back-reflections that produces on first inclined surface change direction, thereby back-reflections is guided to photoemitter away from the sensitivity in the TOSA.Similarly, the inclined surface of optical devices makes any back-reflections that produces on the surface of optical fiber or optical waveguide similarly change direction, thereby back-reflections is guided to transmitter away from TOSA.When optical devices are attached among the ROSA, the inclined surface of these optical devices can make any back-reflections changed course of producing direction away from the port of ROSA in ROSA, thereby back-reflections can not turn back to the photoemitter of the sensitivity in the long-range TOSA as bulk of optical feedback by optical cable or optical waveguide.
In addition, example optical device disclosed herein can be molded as the part of the cylindrical shell of OSA integratedly.Optical devices are formed integrally as the part of the cylindrical shell of OSA, make that the cost of the material that forms optical devices is swallowed up in the cost of cylindrical shell.In addition, optical devices are formed integrally as the part of the cylindrical shell of OSA, have eliminated the cost that optical devices is assembled into OSA.
In the another kind of the disclosed layout of Fig. 3 A to 4B was replaced, a plurality of optical devices 200 can be included in the single OSA, thereby further isolated any back-reflections in the OSA.Therefore, can consider such example embodiment: a plurality of optical devices 200 in series are arranged in the OSA.In addition, example optical device 200 can be used in combination with other known devices that is used to reduce back-reflections.In addition, for realization desired effects with regard to the isolation back-reflections, optical devices 200 can be used in combination with quarter-wave plate.
When optical devices 200 were used in combination with quarter-wave plate, for example, quarter-wave plate can be arranged between laser instrument 122 and the lens 114, between lens 114 and the optical devices 200 or any position between optical devices 200 and the optical fiber 208.In addition, optical devices 200 can be used for other optical application.For example, optical devices 200 can be used for considering the metal port of any optics of backreflection.
Under the situation that does not break away from spirit of the present invention or essential characteristics, can implement the present invention with other specific forms.It is exemplary, nonrestrictive that described embodiment only is regarded as on aspect all.

Claims (20)

1. optics comprises:
The central optical surface of contiguous optical axis;
The periphery that extends from described central optical radial surface ground; And
Step portion between described central optical surface and described periphery, described step portion are formed described central optical surface are protruded on described periphery.
2. optics according to claim 1 also comprises the boundary member that axially, radially extends from described periphery.
3. optics according to claim 2, described boundary member protrudes on described central optical surface.
4. optics according to claim 1, wherein, described optics comprises the main body that is formed by the material to the small part light-permeable, described main body is configured in the optical sub-assembly between light electric transducer and optical cable or optical waveguide; Wherein, described central optical surface comprises the first surface of the main body with first angle; And wherein, described optics also comprises the second surface of the main body with second angle relative with described first surface.
5. optics according to claim 1, wherein, described center surface comprises at least a in smooth surface, spherical surface and the aspheric surface.
6. optics according to claim 1, wherein, described optics comprises at least a in prism and the lens.
7. optics comprises:
Have from the optical surface of the optical axis that wherein extends through;
The periphery adjacent with described optical surface; And
The boundary member adjacent with described periphery, wherein, at least a portion in the described periphery limits recess between described boundary member and described optical surface.
8. optics according to claim 7, wherein, described optical surface protrudes with respect to described periphery.
9. optics according to claim 7, wherein, described boundary member protrudes on described optical surface and described boundary member.
10. optics according to claim 7 also is included in the step portion between described periphery and the described optical surface.
11. optics according to claim 7 also is included in the step portion between described periphery and the described boundary member.
12. optics according to claim 7, wherein, described optical surface is formed by plastic material.
13. an optical sub-assembly comprises:
The optical-mechanical retainer; And
Be fixed to the optics of described optical-mechanical retainer, described optics comprises the central optical surface of contiguous optical axis, from periphery and the step portion between described central optical surface and described periphery that described central optical radial surface extends, described step portion is formed described central optical surface is protruded on described periphery
14. optical sub-assembly according to claim 13, wherein, described optics comprises that lens and being used for control optical devices at least a of backreflection.
15. optical sub-assembly according to claim 13, wherein, described optics is press fit into described optical-mechanical retainer.
16. optical sub-assembly according to claim 15, wherein, described optics is formed by plastic material.
17. optical sub-assembly according to claim 13, wherein, described optics comprises the main body that is formed by the material to the small part light-permeable, and described main body is configured in the optical sub-assembly between light electric transducer and optical cable or optical waveguide; Wherein, described central optical surface comprises the first surface of the main body with first angle; And wherein, described optics also comprises the second surface of the main body with second angle relative with described first surface.
18. optical sub-assembly according to claim 17, wherein, described first angle and described second angle equate.
19. optical sub-assembly according to claim 17, wherein, described first angle and described second angle are unequal.
20. optical sub-assembly according to claim 13, wherein, described optics also comprises the boundary member of contiguous described periphery.
CN2007800358058A 2006-10-04 2007-10-04 Surface warp resistant optical devices Active CN101535854B (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US82816606P 2006-10-04 2006-10-04
US60/828,166 2006-10-04
US97307007P 2007-09-17 2007-09-17
US60/973,070 2007-09-17
US11/864,687 US7572069B2 (en) 2007-09-17 2007-09-28 Surface warp resistant optical devices
US11/864,687 2007-09-28
PCT/US2007/080461 WO2008043028A2 (en) 2006-10-04 2007-10-04 Surface warp resistant optical devices

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JP3958891B2 (en) * 1999-04-23 2007-08-15 矢崎総業株式会社 Optical connector
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JP2003227968A (en) 2002-02-01 2003-08-15 Sony Corp Optical link device
JP2004361583A (en) 2003-06-03 2004-12-24 Matsushita Electric Ind Co Ltd Optical module
EP1722258A1 (en) * 2005-05-13 2006-11-15 STMicroelectronics S.r.l. Optical radiation coupling module
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WO2008043028A3 (en) 2008-11-20
WO2008043028A2 (en) 2008-04-10
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WO2008043028A9 (en) 2008-05-22
EP2076804A4 (en) 2013-07-10
TW200821647A (en) 2008-05-16

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