EP2614396A2 - Composant optoélectronique - Google Patents

Composant optoélectronique

Info

Publication number
EP2614396A2
EP2614396A2 EP11771006.1A EP11771006A EP2614396A2 EP 2614396 A2 EP2614396 A2 EP 2614396A2 EP 11771006 A EP11771006 A EP 11771006A EP 2614396 A2 EP2614396 A2 EP 2614396A2
Authority
EP
European Patent Office
Prior art keywords
optical
housing part
transmitter
optoelectronic
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11771006.1A
Other languages
German (de)
English (en)
Inventor
Wojciech Piotr Giziewicz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amphenol Tuchel Electronics GmbH
Original Assignee
Amphenol Tuchel Electronics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amphenol Tuchel Electronics GmbH filed Critical Amphenol Tuchel Electronics GmbH
Publication of EP2614396A2 publication Critical patent/EP2614396A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G02B6/4212—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel
    • 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
    • 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
    • G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
    • 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
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/4228—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements
    • G02B6/423—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements using guiding surfaces for the alignment
    • 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
    • G02B6/4246—Bidirectionally operating package structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers
    • 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

Definitions

  • the present invention relates to an optical coupling device and an optoelectronic device (e.g., an electro / optical (E / O) converter (transmitter) and / or an optical / electrical (O / E) converter (receiver) and methods of manufacture.
  • an optoelectronic device e.g., an electro / optical (E / O) converter (transmitter) and / or an optical / electrical (O / E) converter (receiver) and methods of manufacture.
  • the invention preferably relates to an optoelectronic transceiver (in short: an optical transceiver) in which electrical-optical transmission devices (which, for example, have an optical transmitter element, a VCSEL) and optical / electrical reception devices (which, for example, act as an optical reception element) Photodiode have) can be used. While in the use of electrical transceivers, the transmission and reception information between two electric transceivers by using electric waves or signals, the transmission and reception information is transmitted by optical waves or signals when using two optical transceivers.
  • electrical-optical transmission devices which, for example, have an optical transmitter element, a VCSEL
  • optical / electrical reception devices which, for example, act as an optical reception element
  • a transceiver In the receive mode of a transceiver, it converts those received, for example, from an optical fiber, e.g. a fiber, supplied on an optical link transmitted optical input signals in electrical see signals, which are then further processed in the optical transceiver itself and / or in connected circuits.
  • an optical fiber e.g. a fiber
  • the transceiver converts electrical input signals into optical signals to be transmitted on the optical link.
  • the optical transceiver on an operating as an E / O converter optical element, for. B. a VCSEL laser.
  • an optoelectronic component for example a transceiver
  • an optical coupling arrangement uses a fiber optic prism 10 and comprises: a substrate 20 having at least one light element 24 and at least one waveguide 22 overlying a substrate 20, further comprising a fiber optic prism Prism 1 0 is provided.
  • the fiber optic prism 10 receives light through the first side surface 12, reflects the received light from a third side surface 16, and transmits the reflected light from the third side surface 16 through a second side surface 14.
  • the fiber optic prism 10 is disposed such that the first side surface 12 is arranged adjacent to the light element 24, and the second side surface 14 is adjacent to the waveguide 22.
  • the light element 24 may comprise a light-emitting device such as an LED or a VCSEL or a light-receiving device, such as a photodiode.
  • An alternative arrangement is shown in Figure 4 of the '385 patent.
  • the fiber optic prism is a separate component, which must be made separately and also needs to be adjusted when it is installed in the transceiver.
  • the present invention is in particular the object of providing an optoelectronic component, wherein coupling means are provided for an electro / optical transmitter and for an optical / electrical receiver and in particular for an optoelectronic transceiver such that the adjustment effort for the optical components, eg , B. the optical element and the light guide is low.
  • optical coupling means or a coupling device which has an integrated optical fiber alignment (preferably light fiber alignment) and integrated mirror structures or integrated mirror properties.
  • the optical coupling means comprise both optical and mechanical coupling means.
  • These may be in the form of an optoelectronic semiconductor package, i. E. an optoelectronic package (semiconductor package) is provided which combines the fiber optic alignment feature (physical or mechanical fiber alignment) with the feature of beam excursion which ensures nearly perpendicular radiation incidence into the input face of the fiber. This is preferably done by beam deflection by means of collimation.
  • an optoelectronic transceiver using such an optical coupling device is provided, which can be made small enough to be used in the USB 1.0, 2.0, 3.0 connector technology.
  • the critical functions of the fiber alignment as well as the beam deflection and collimation are achieved in a single manufacturing step by shaping the optoelectronic component or semiconductor housing part forming the optical coupling device, wherein no further active alignment step is required.
  • the optical coupling device designed according to the invention as a molded plastic body forms a first housing part of a component housing and forms an encapsulation with a second housing part or component carrier carrying an optical element.
  • the plastic body is preferably formed directly on the component carrier carrying the optical element.
  • an optical element is e.g. in the form of a VCSEL for the driver (optical transmitter) and / or an optical element in the form of a photodiode for the receiver (receiver), i.
  • the optoelectrical semiconductor housing if it contains an optical transmitter and / or an optical receiver, and possibly also other electrical circuits, forms an optoelectronic component according to the invention, for example, preferably a transceiver.
  • the optoelectronic component or semiconductor housing having the optical coupling device is achieved by an efficient coupling between an optical fiber (optical waveguide) and an optical element (transmitting and / or receiving element), preferably with a 90 ° beam deflection, in that the coupling device provides optical fiber alignment and beam deflection and focusing by providing or molding a molded, highly transparent plastic body forming the optical coupling device (coupling means) directly on a component carrier carrying the active element (s).
  • the plastic body forms the optical coupling means.
  • the so-called "overmold packaging technology” is used for production
  • other plastic molding processes such as transfer overmolding with light-curable plastic can be used.
  • the optoelectronic housing part is formed in such a way that the plastic or overmold material is highly transparent and forms a mechanical connection with a further material of a second housing part or component carrier when the housing part is formed.
  • the second housing part may be a component carrier and carries an optical element and optionally other components or electrical circuits.
  • the second component carrier is for example a substrate or a leadframe or a ceramic.
  • the plastic or the overmold plastic material which forms the housing part forms a reflector or reflecting mirror, which forms a reflection interface, preferably a total reflection interface for the light, between the optical element (s) positioned on the support the entrance end face of the light guide (and possibly vice versa) is to be transmitted.
  • the reflection mirror forming the reflection interface is an internal conical total reflection mirror.
  • the plastic forms the reflection mirror as a result of the transition from the plastic material with a higher refractive index to the air with the refractive index 1.
  • the first housing part formed by the plastic in particular by the overmolding process, forms an encapsulating optoelectronic component housing when forming it together with the component carrier, the optical coupling device acting as optical coupling means and mechanical coupling means the latter are preferably provided as alignment means for the light guide.
  • the alignment means are preferably formed by a V-groove in the housing part.
  • Figure 1 is a schematic side view of an optoelectronic device according to the invention with a first and a second housing part 10 having optoelectronic housing (or an optoelectronic semiconductor package) in which an optical element and coupling means are provided for light to and / or from a light guide.
  • FIG. 2 is a schematic view of two housing parts forming the housing of the optical component of FIG. 1;
  • FigiS is a schematic representation similar to FIG. 1, wherein it is assumed here that the electro-optical component as an embodiment of the invention is an optoelectronic transceiver, in which a formed by the first of a preferably highly transparent plastic internal conical Tollreflections mirror for the optical connection between optical receiver / optical transmitter and the light guide and also provided for alignment means for the light guide;
  • FIG. 4 schematically shows an electro-optical converter (transmitter) with its preferred dimensions, wherein in the transmit mode a light beam emanating from a VCSEL is reflected and collimated towards an input end face of the light guide through a reflection surface formed by the first housing part;
  • FIG. 5 shows a schematic cross section of the optical component, in particular of the optical transmitter of FIG. 4, from the right in FIG. 4 approximately along the line AA in FIG. 6, wherein the alignment means only indicated in FIG are clearly visible from the first housing part in the form of an alignment groove for the light guide;
  • Fig. 6 is a schematic plan view similar to Fig. 1 1 on a device according to FIG.
  • FIG. 8 schematically and analogously to FIG. 3 a transceiver with its schematically shown light transmission paths
  • Fig. 9 is similar to Fig. 8, but showing an electro-optical transmitter
  • Fig. 10 is similar to Fig. 8 but shows an electro-optical receiver
  • FIGS. 3 to 10 is a perspective top view of an inventively designed optoelectronic device, for example a transmitter, a receiver or a transceiver according to FIGS. 3 to 10; and
  • FigLOI 2 the device of Figure 1 1 from a different perspective.
  • FIGS. 13 and 14 schematically show the invention with two reflection surfaces formed by the optoelectronic component or its coupling means
  • FIG. 15 is a schematic view of the beam path for a receive beam and a transmit beam similar to FIGS. 13 and 14; FIG.
  • FigL5l 6 schematic views similar to FIGS. 1 1 and 12, but here in each case two reflection surfaces, formed by the component housing, are provided.
  • FIG. 1 generally shows an optoelectronic component 20 according to the invention (in short: component) 10 with an optoelectronic housing, which may also be referred to as a capsule, encapsulating the housing or the capsule 9 at least one optical element 17 and possibly others.
  • Coupling means 300 provide efficient connection or coupling between the optical element 17 and a cooperating optical fiber (eg, a fiberglass) 12.
  • the coupling means 300 are provided by a coupling structure, in particular by the shape or construction of the housing 9, such that at the same time an optical coupling by optical coupling means 301 and a mechanical coupling and alignment by mechanical coupling / alignment means 302 between the optical element 17 and the light guide 12 is reached.
  • the coupling means 300 cause a 90 ° change in the optical path and a passive alignment of all elements, in particular the optical element 17 and the light guide 12 of the device 10th
  • the housing 9 essentially consists of two housing parts, a first housing part 11 and a second housing part 14 carrying the optical element 17.
  • the first housing part 11 essentially forms the coupling means 300, which on the one hand form the optical connection (an optical transmission path) ) between the light guide 12 and the optical element 17 (by the optical coupling means 301) and the alignment (by the mechanical coupling / alignment means 302) for the light guide 12, in particular its entrance / exit surface 24, 25th
  • the second housing part 14 may be a carrier, preferably as shown, in the form of a leadframe (substrate) 14.
  • the optical element 17 is connected by a wire bonding 21 to the conductors of the second housing part 14 so as to be as shown in FIGS. 3-6, to produce an electrical connection, for example with an ASIC 13 likewise arranged on the second housing part 14.
  • the first housing part 11 consisting of a highly transparent plastic material 30 is formed according to the invention, and connected to another material, namely the material of the second housing part 14, by the overmolding spraying method ,
  • the first housing part 11 forms the optoelectronic component 10 with the second housing part 14 carrying the optical element 17.
  • the coupling means 300 and the mechanical coupling / alignment means 302 also form, as shown in Fig. 5 can be seen clearly, fiber optic or Faserausrichtnut 20 for receiving the light guide 12.
  • the groove is, in the illustrated exporting ⁇ approximately example by two sloping side walls 210, 220 and a bottom wall 230 formed.
  • the Faserausrichtnut 20 further includes a rear wall 240.
  • FIG. 1 generally shows an optical component 10 which, depending on how the optical element 17 is embodied as a transceiver 110, as illustrated in FIG. 8, as a transmitter 120 as illustrated in FIG. 9 or as a receiver 130 as in FIG. 10 illustrated, wherein with the optical elements 170, 171, 172 cooperating electrical circuits, such as an ASIC 13 may be provided.
  • the ASIC 13 is connected by wires or connecting wires 22, 23 with conductors in the second housing part 14.
  • the optical element 17 is connected to a conductor of the second housing part 14.
  • the optical element 170 comprises both a transmitter and a receiver and communicates with the optical fiber 12 via a transmit transmission path 1 and a receive transmission path 2
  • the optical device is a transmitter or transmitter 120 and has as optical element a transmitting optical element 171 (e.g., a VCSEL) connected to the optical fiber 12 via a transmitting beam 1.
  • the optical device 130 in FIG. 10 is a receiver or receiver 120, the optical element being, for example, a photodiode 172 receiving a receive beam 2 coming from the light guide 12.
  • the optical component is a transceiver 110 which can be advantageously used in a USB 3 ⁇ plug connector according to the invention, in particular in a socket of a transceiver which has a corresponding cable, which also has light conductors with a another device is in communication, which also has a corresponding socket.
  • the transceiver 1 10 is in principle constructed so that the optical component 10 shown in FIG. 1, here replaced by the optical element 170, which comprises a transmitting device and receiving device, which is not shown in detail in FIG 3 is shown.
  • the plastic material specifically the overmold material 30 forms the coupling means 300 between the optic element 170 and the light guide 12.
  • the coupling means 300 comprise, as mentioned, optical coupling means 301 and mechanical coupling means 302.
  • the optical coupling means 301 form, through the material 30 at the interface with the air, a reflector with a reflecting surface 321, preferably in the form of a conical mirror with total internal reflection.
  • the reflection surface 321 is formed such that both the transmitted optical beams and the received optical beams are efficiently deflected by the reflection surface 321.
  • the first housing part 1 1 and the second housing part 14 each have a longitudinal extent of the order of 2.5 mm and the width is about 2.1 mm. Due to these small dimensions, the use of a component 10 designed according to the invention as an optoelectronic transceiver 10 is advantageous, in particular when forming a socket for USB 3x connections, since the electronic-optical transceiver together with the existing USB 3.0 sockets and the USB 2.0 sockets can be used, which do not provide optical transmission (backward compatibility). As shown in FIG.
  • the radiation 1 emitted from the optical transmission receiving element 170 is reflected by the reflecting surface 321 of a reflector formed by the housing part 11 and formed by the first housing part 30 collimates and then impinges on the input end face 24 of the optical fiber 12 substantially perpendicularly to be forwarded therefrom.
  • the optical fiber or the optical fiber 12 may be a single-mode or a multi-mode optical fiber.
  • the optical component 10 is thus formed by the first housing part together with the second housing part carrying the optical element and circuits, and in the case of FIGS. 3-8 and 11 and 12, the entire optoelectronic transceiver 110.
  • the optical fiber alignment and the preferably 90 ° beam deflection and collimation is achieved in an integral manner by the first housing part 11, preferably the overmold housing part and the second housing part 14 of the transceiver 110.
  • the optoelectronic semiconductor package thus comprises the first housing part 11, and the second housing part, e.g. the leadframe 14, wherein then together with a driver and / or a receiver and an ASIC, the optical component 10, in the case of Fig. 3, the optical transceiver 1 10 is formed.
  • the leadframe 14 is typically a metallic stamped part on which
  • FIG. 6 shows a schematic plan view of the arrangement according to FIG. 4.
  • two or more alignment openings or holes 50, 51, 52 are punched out near the attachment area of the optical element 170.
  • the optical element 170 is disposed at a predetermined position with respect to the alignment openings 50-52 with high accuracy.
  • the component carrier embodied as a leadframe 14 is in particular overmolded, ie overmolded with the overmold material 30 of the housing part 1, whereby the overmold material 30 or the overmold housing part 11 is connected to the component carrier 14, preferably in the form of the leadframe
  • overmolding technologies, eg stamping / embossing, UV methods (eg similar to Thin Fusion), but with emphasis on “transfer overmolding”.
  • the tolerance chain for the course of the optical radiation between the optical element 170 and the light guide or the optical fiber 12 is therefore the following:
  • the placement accuracy of the placement of the optical element 17 or 170, or 171 or 171 172 forming chips) and the alignment accuracy of Overmoldgephinuseteils 1 1 + mold material quality is taken into account.
  • the fiber alignment feature is in the overmold housing part (or mold material) itself, only the mold tooling affects the overmold repeatability and alignment accuracy with the reflective surface 32 and 321, respectively, in the case of the transceiver 1 10th
  • step 70 the leadframe 14 is provided and in step 71, the corresponding conductor tracks are punched and the leadframe 14 is gegege If necessary, undergo a bending process.
  • step 72 the lead frame 14 is plated, for example, with gold, in which case the ASIC 75 is attached to the leadframe 14 by a conductive epoxy resin by means of die bonding 24 in step 73.
  • step 76 also using the conductive epoxy resin, the precise attachment of the optical element 170, such as a VCSEL as shown in FIG. 4, or a photodiode, not shown, is also performed.
  • step 77 the wire bonds z. B. 21, 22, 23, attached.
  • Step 81 is the overmold process step.
  • the overmold material (mold compound) held available in step 78 is injected over the leadframe 14 with optical elements 17 or 170 and ASIC 13 mounted thereon, forming an internal reflection mirror with the reflection surface 321, preferably one internal conical total reflection mirror with the reflection surface 32.
  • step 84 a punching / bending separation takes place during production of the transceivers 110 on a conveyor belt.
  • step 85 the functions of the optical transceiver 110 are tested.
  • step 86 the final assembly is made for the optical fiber 12 provided in step 79, optionally mounting an additional metal housing made available in steps 80 and 83 in step 86, like the metal also provided after steps 82 and 83 in the final assembly.
  • FIGS. 11 and 12 show external views of the transceiver 110 shown and described in FIGS. 3-7. It should be noted that instead of overmolding, one could also use the word "encapsulation" to express that other molding methods can be used. Also, a bidirectional version is possible. Based on the above explanations, the invention provides an optoelectronic component 100 which, in addition to a reflector D, has another conical reflector B also formed by the optical coupling means 30.
  • the left reflector A embodied in Figs. 13-17 is an additional feature of this invention.
  • the additional reflector A is, as shown in FIGS. 13-17, downstream of the reflector C. The combination of the two reflectors works as explained below.
  • the two reflectors A, C are formed by the above-described first housing part 11, which is shaped such that it forms the respective reflection surfaces x, y.
  • the receiver 172 receives the light entering through the optical fiber (optical fiber core) over the surface D.
  • the light is reflected away at the conical surface C and thereby turned by 90 ° and approximately collimated. It then falls on the photodiode or photodetector 672 below the reflector C, specifically within the first housing part 11, specifically the overmold connection or the overmold plastic.
  • the emitter 171 on the other hand, (VCSEL) emits the light incident on the conical reflector surface A.
  • the beam is turned (by less than 90 °) and partially collimated due to total internal reflection.
  • the beam exits the first housing part 1 1, especially the overmold plastic, through the surface B and re-enters the housing part 1 1 through the conical surface C.
  • C and D effectively form a spherical plane convex lens.
  • VCSEL photodiode crosstalk should be substantially zero, with potential contributions could only occur from scattering due to surface roughness.
  • the overmold offers a protective function in the sense of a housing, against mechanical forces and environmental influences, such. B. water.
  • the "die” and then "wire bond” of the ASIC and possibly also the OE components could be monotoped in a flip-chip process.
  • substrate materials such as FR-4 or ceramic instead of a "leadframe”.
  • the invention not only relates to a transmission direction, but, as explained, two optoelectronic components as well as one or two ASICs, furthermore two mirrors and two fiber trenches can be used.
  • the optical transceiver comprises an optical transmitter 171, an optical receiver 172 and coupling means 300, consisting of a first th and second optical lens, see. Fig.
  • the first lens in the coupling means 300 lying concave Reflecting surface for signals of the optical transmitter and the second lens forms an inner concave reflection surface for incoming signals via an outer convex transmission surface for outgoing signals of the optical transmitter.
  • the position of the lenses formed in this way is provided in such a way that an efficient transmission of both the transmitted and the received signals takes place.
  • the material forming the coupling agent preferably has a refractive index of> 1.3.
  • the inner surface of the second lens having a radius of curvature is formed so as to satisfy the condition of total reflection, with respect to optical paths of optical signals incident on the interface from the optical fiber 12.
  • material with a refractive index of> 1.3 may be used, wherein the inner surface of the first lens is formed with a radius of curvature such that the condition of total reflection is satisfied with respect to optical paths of optical signals coming from the transmitter 171 onto the Meet interface.
  • the alignment of the photoelements is already ensured in the production process, the deflection of the light being achieved by the encapsulation, ie the overmold material.
  • the mirror effect is enhanced or improved by the fact that the mirror curve, also referred to as "Conic Mirror", is designed so that one does not spot-like light rays, but rather a spot, a light spot, and thus safely coupled into the fiber optics.
  • the two reflectors operate as follows. Due to the total internal reflection, the light is reflected by the conical surface C and thereby deflected by 90 ° and approximately collimated. It then falls on a arranged below the reflector within the overmold material 30 photodiode. As far as the emitter is concerned, the light emitted by a VCSL will strike a conical reflector surface A. The beam is turned around (less than 90 °) and partially collimated, due to total internal reflection. The beam then exits the overmold material through the surface B and re-enters through the conical surface C, and finally exits through the surface D. As previously mentioned, C and D effectively form an eccentric aspheric plane convex Lens.
  • the present invention additionally provides another conical reflector in front of the reflector as described in the foregoing.
  • the left reflector A represents the additional feature of this invention.
  • the additional reflector A is, as shown in FIG. 15, arranged downstream of the reflector C. The combination of the two reflectors works as explained below.
  • the two reflectors are formed by the first housing part described above, which is shaped to form the respective reflection surfaces X and Y.
  • the receiver receives the light entering through the optical fiber core over the surface D.
  • the light is reflected away at the conical surface C and thereby turned by 90 ° and approximately collimated. It then falls on the photodiode or the photodetector below the reflector, specifically within the first housing part of the overmold connection or the over-mold plastic.
  • the emitter on the other hand (VCSEL) emits the light which impinges on the conical reflector surface A.
  • the beam is turned (by less than 90 °) and partially collimated due to total internal reflection.
  • the jet exits the first housing part, especially the overmold plastic, through the surface B and re-enters the conical surface C and finally exits through the surface D. Where C and D effectively form a spherical plane convex lens.
  • VCSEL photodiode crosstalk should be substantially zero, with potential contributions only from scattering due to surface roughness. This is not necessarily the case in other implementations where, for example, temperature stabilization may be required to avoid crosstalk. It should be noted that the geometry shown in FIG. 15 is only one possible
  • surface A could be formed in some cases as a flat tilted surface.
  • the surfaces B and D could be provided with outward orientations, either to facilitate release of the molded first housing part or to act as an optical prism.
  • the precise choice of geometry depends on the core diameter and the numerical aperture of the optical fiber. More specifically, the numerical aperture dictates the maximum angle of incidence of the beam on the fiber. Therefore, the smaller the numerical aperture, the more accurate is the control or control of the reflector geometry in the assembly.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Semiconductor Lasers (AREA)

Abstract

L'invention concerne à un émetteur-récepteur optoélectronique qui comprend les éléments suivants : un émetteur optique, un récepteur optique, des moyens de couplage composés d'une première et d'une deuxième lentille optique dotées d'interfaces optiquement actives pour modifier/dévier des chemins optiques, d'une part de signaux de départ optiques A de l'émetteur optique vers un conducteur optique pouvant être connecté et, d'autre part, de signaux d'entrée E du même conducteur optique vers le récepteur. L'invention est caractérisée en ce que la première lentille comporte une surface de réflexion concave se trouvant à l'intérieur du moyen de couplage pour des signaux de l'émetteur optique, et la deuxième lentille comporte une surface de transmission convexe située à l'extérieur pour des signaux émis par l'émetteur optique ainsi qu'une surface de réflexion concave située à l'intérieur pour des signaux entrant.
EP11771006.1A 2010-09-12 2011-09-12 Composant optoélectronique Withdrawn EP2614396A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010044835 2010-09-12
PCT/EP2011/004582 WO2012031781A2 (fr) 2010-09-12 2011-09-12 Composant optoélectronique

Publications (1)

Publication Number Publication Date
EP2614396A2 true EP2614396A2 (fr) 2013-07-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11771006.1A Withdrawn EP2614396A2 (fr) 2010-09-12 2011-09-12 Composant optoélectronique

Country Status (6)

Country Link
US (2) US8985868B2 (fr)
EP (1) EP2614396A2 (fr)
JP (1) JP2014500968A (fr)
CN (1) CN103140787A (fr)
DE (1) DE102011113172A1 (fr)
WO (1) WO2012031781A2 (fr)

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JP2014500968A (ja) 2014-01-16
US8985868B2 (en) 2015-03-24
US20140050490A1 (en) 2014-02-20
WO2012031781A2 (fr) 2012-03-15
CN103140787A (zh) 2013-06-05
US20150241647A1 (en) 2015-08-27
WO2012031781A3 (fr) 2012-05-24
DE102011113172A1 (de) 2012-03-15

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