CN217561783U - Integrated optical engine structure - Google Patents
Integrated optical engine structure Download PDFInfo
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- CN217561783U CN217561783U CN202220391481.3U CN202220391481U CN217561783U CN 217561783 U CN217561783 U CN 217561783U CN 202220391481 U CN202220391481 U CN 202220391481U CN 217561783 U CN217561783 U CN 217561783U
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Abstract
The utility model discloses an integrated light engine structure, including the base plate with locate the subassembly on the base plate, the subassembly includes fiber array, lens array, PD array and TIA transimpedance amplifier, the lens array includes a plurality of lenses, lens be with the same spherical lens of the first positioning section diameter of optic fibre, a plurality of lenses are located many V-arrangement grooves respectively, a plurality of photoelectric detector's signal receiving face is just to the notch in many V-arrangement grooves respectively. The utility model discloses a ball lens, ball lens are the same with the first positioning section external diameter of optic fibre, and the optical axis of guaranteeing optic fibre with V-arrangement groove structure coincides with the center of lens, and increase light path stability reduces the technology degree of difficulty, and this photo engine structure realizes the photoelectric conversion function, extensively is applicable to high rate communication or sensing system.
Description
Technical Field
The utility model belongs to the technical field of optical communication and sensing, concretely relates to integrated optical engine structure.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
With the emergence of intelligent equipment, cloud computing and the Internet of things, the network demand is continuously increased, the transmission rate of the system is greatly improved, and 100G and higher transmission systems are applied. For a high-speed optical module, a multi-pass chip integration mode is generally adopted at present to improve the transmission rate of a device. The high-speed PD photosensitive surface is smaller, in order to improve the coupling efficiency of the PD array, one method adopts the PD array etched with a silicon lens, the coupling efficiency and the actual assembly operation are simple, but the manufacturing complexity is high, and the other method is to converge the incident beam to the end surface of the PD array through the lens array to improve the coupling efficiency, but the optical path structure is complex, the assembly steps are multiple, and the operation is difficult. The methods all adopt an active coupling process, and are complex and low in efficiency.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model aims to solve the technical problem how to provide an integrated light engine structure that integrates for photoelectric coupling has simple structure, the assembly step is few, simple process easily operates, advantage that the coupling efficiency is high.
In order to solve the above technical problem, the utility model provides an integrated light engine structure, include the base plate and locate subassembly on the base plate, the subassembly includes:
the optical fiber array is used for outputting light beams, and comprises a bottom plate, a pressing plate and a plurality of optical fibers, wherein the bottom plate is provided with a positioning groove array, the positioning groove array comprises a plurality of V-shaped grooves which are parallel to each other, the optical fibers comprise first positioning sections forming light emitting surfaces, the first positioning sections of the optical fibers are respectively embedded in the V-shaped grooves, and the pressing plate tightly presses the first positioning sections of the optical fibers in the V-shaped grooves;
the lens array is used for focusing the light beams and comprises a plurality of lenses which are respectively arranged on the light emergent sides of the optical fibers;
the PD array is used for receiving the focused light beams and converting optical signals into electric signals, and comprises a plurality of photodetectors which are respectively arranged on the light emergent sides of the lenses;
the TIA transimpedance amplifier is used for receiving the electric signal and carrying out amplification processing;
the lenses are spherical lenses with the same diameter as the first positioning section of the optical fiber, the lenses are respectively arranged in the V-shaped grooves, and the signal receiving surfaces of the photoelectric detectors are respectively opposite to the notches of the V-shaped grooves.
In an embodiment of the present invention, the light emitting surface of the optical fiber is an inclined surface which is not perpendicular to the optical axis of the optical fiber, and the light emitting surface of the optical fiber and the spherical lens are plated with an antireflection film.
The utility model discloses an embodiment, ball lens is silicon lens, the first positioning section of optic fibre with ball lens's external diameter is 125um, ball lens with the play plain noodles interval of optic fibre is 20-30um, ball lens with the interval of receiving the face of photoelectric detector is 30-40um.
In an embodiment of the present invention, the groove wall of the V-shaped groove is a plane or an outward convex arc surface.
In an embodiment of the present invention, the first positioning section of the optical fiber is a bare optical fiber.
The utility model discloses an embodiment, the PD array with be equipped with routing electric capacity between the TIA transimpedance amplifier and adjacent the two passes through gold thread bonding communication.
The utility model discloses an embodiment, optic fibre still includes the second positioning section, first positioning section with the second positioning section is located optic fibre is along length direction's different positions, second positioning section and the part that meets it first positioning section is buried and is set for and be located in the optical cement on the bottom plate.
In an embodiment of the present invention, the base plate is provided with a recessed area for embedding the bottom plate.
The utility model discloses an in the embodiment, the bottom plate with the clamp plate passes through UV and glues the connection, the subassembly is glued through silver and structure and is connected the base plate.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1) The utility model discloses an integrated optical engine structure adopts spherical lens, and spherical lens is the same with the first positioning section external diameter of optic fibre, guarantees the optical axis of optic fibre and the center coincidence of lens with V-arrangement groove structure, increases the light path stability, reduces the technology degree of difficulty, and this optical engine structure realizes the photoelectric conversion function, extensively is applicable to high rate communication or sensing system;
2) The utility model discloses an integrated optical engine structure, the optical fiber is provided with an inclined plane and an anti-reflection film, the lens is also provided with the anti-reflection film, the inclined plane plays the role of anti-reflection, and the link loss is reduced;
3) The utility model discloses an integrated optical engine structure, the silicon lens size can reach micron order of magnitude through the sculpture, and the special design of silicon lens object distance and image distance improves the process tolerance when guaranteeing the high efficiency coupling of optic fibre and photoelectric detector, the operation of being convenient for;
4) The utility model discloses an integrated optical engine structure, through setting up routing electric capacity, can shorten the length of routing;
5) The utility model discloses an integrated optical engine structure, optic fibre, lens and photoelectric detector all are the array setting, have increased and pasted the dress tolerance, are convenient for passive subsides dress;
6) The utility model discloses an integrated optical engine structure, the size of fiber array, lens array and PD array matches, and the passive subsides of location mark realization on the rethread base plate are pasted and are adorned the required precision +/-2 um and realize easily.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a top view of an integrated photovoltaic engine structure according to the present disclosure;
fig. 2 is a side view of an integrated photovoltaic engine structure of the present disclosure;
FIG. 3 is a schematic view of the assembly of the base plate and the pressure plate of the present disclosure;
fig. 4 is an assembly schematic diagram of a base plate, optical fibers, and ball lenses disclosed in the present invention;
fig. 5 is a schematic structural diagram of the substrate disclosed in the present invention.
Wherein, 1, a substrate; 11. a recessed region; 21. a base plate; 22. pressing a plate; 23. an optical fiber; 231. a first positioning section; 232. a second positioning section; 24. a V-shaped groove; 25. an optical colloid; 31. a spherical lens; 41. a photodetector; 5. a TIA transimpedance amplifier; 6. and (5) routing a capacitor.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further improvements to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise. In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure. In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by a person skilled in the art and should not be construed as limiting the present disclosure.
The following is a preferred embodiment of the present invention for illustration purposes, but is not intended to limit the scope of the invention.
Example one
Referring to fig. 1 to 5, as shown in the drawings, an integrated optical engine structure includes a substrate 1 and a component disposed on the substrate 1, where the component includes:
an optical fiber array for outputting a light beam, the optical fiber array including a bottom plate 21, a pressing plate 22 and a plurality of optical fibers 23, the bottom plate 21 having a positioning groove array, the positioning groove array including a plurality of V-grooves 24 parallel to each other, the optical fibers 23 including first positioning segments 231 having light exit surfaces, the first positioning segments 231 of the optical fibers 23 being respectively embedded in the V-grooves 24, the pressing plate 22 pressing the first positioning segments 231 of the optical fibers 23 in the V-grooves 24;
a lens array for focusing a light beam, the lens array including a plurality of ball lenses 31, the ball lenses 31 having the same outer diameter as the positioning sections of the optical fibers 23, the plurality of ball lenses 31 being respectively provided in the plurality of V-grooves 24, and the plurality of ball lenses 31 being respectively positioned on light exit sides of the plurality of optical fibers 23;
a PD array for receiving the focused light beam and converting an optical signal into an electrical signal, wherein the PD array includes a plurality of photodetectors 41, and the photodetectors 41 are respectively disposed on the light emitting sides of the plurality of spherical lenses 31;
and the TIA transimpedance amplifier 5 is used for receiving the electric signal and amplifying the electric signal.
The V-shaped groove needs to use a special cutting process to realize accurate optical fiber positioning, the first positioning section of the optical fiber is arranged in the V-shaped groove, the optical fiber core needs to be accurately positioned in the V-shaped groove through an ultra-precision machining technology in the process so as to reduce connection loss, then the optical fiber core is pressed by the presser component and fixed by an adhesive, and the end face is optically ground to form an optical fiber array. The optical properties of the fiber array are affected by the material of the base plate and the pressing plate, and the fiber array is ensured to have no stress, high reliability and no fiber displacement at high temperature by using the material with a smaller expansion coefficient. Glass and silicon are commonly used materials, and in addition, ceramics, conductive substrates, and plastic substrates are also available. The positioning sections of the lens and the optical fiber are fixed in the V-shaped groove, the V-shaped groove and the pressing plate have limiting effects, the optical axis of the optical fiber can be ensured to be coincident with the center of the spherical lens, and light emitted by the optical fiber is focused on a photosensitive surface of the photoelectric detector through the spherical lens.
In a preferred embodiment of the present invention, the light-emitting surface of the optical fiber 23 is an inclined surface that is not perpendicular to the optical axis of the optical fiber 23, and the light-emitting surface of the optical fiber 23 and the ball lens 31 are coated with an antireflection film (not shown). Specifically, an included angle between the light emitting surface of the optical fiber and the optical axis is 84 to 86 degrees, for example, 84 degrees, 85 degrees or 86 degrees, light incident on the inclined surface is not reflected back according to the original direction, the effect of reflection resistance is achieved, insertion loss can be reduced, the insertion loss is further reduced by arranging an antireflection film, and the silicon lens is also plated with an antireflection film of a corresponding waveband to reduce the insertion loss.
In a preferred embodiment of the present invention, the ball lens 31 is a silicon lens, the outer diameters of the first positioning segment of the optical fiber 23 and the ball lens 31 are 125um, the distance between the ball lens 31 and the light emitting surface of the optical fiber 23 is 20-30um, and the distance between the ball lens 31 and the receiving surface of the photodetector 41 is 30-40um. Ordinary glass material does not do the ball lens of micron magnitude, silicon lens can realize the ball lens of micron magnitude through the mode of sculpture, the object distance and the image distance of the ball lens of special design of deuterogamy, it is specific, silicon lens and the play plain noodles interval of optic fibre are 20um, 21um, 22um, 23um, 24um, 25um, 26um, 27um, 28um, 29um or 30um etc., the interval of silicon lens and PD receiving surface is 30um, 31um, 32um, 33um, 34um, 35um, 36um, 37um, 38um, 39um or 40um etc., the ball lens structure imaging magnification that is designed is less than 1.1, the coupling insertion loss is less than 1dB. The single-mode laser mode field diameter 9um through fiber emergence, the photosensitive surface effective area of PD is about 14-20um, the receiving angle is about 0-14 degrees, the imaging multiplying power of the designed spherical lens structure is smaller than 1.1, the focusing light spot is smaller than 10um, and the tolerance of PD photosensitive surface and focusing light spot in the direction vertical to the optical axis is > +/-2 um.
In a preferred embodiment of the present invention, the groove wall of the V-shaped groove 24 is a flat surface. The V-shaped groove is tangent to the first positioning section of the optical fiber and the spherical lens, and the optical fiber and the spherical lens with different specifications and sizes can be positioned in a matched mode. In other embodiments it may also be: the groove wall of the V-shaped groove is an outward convex arc surface.
In a preferred embodiment of the present invention, the first positioning segment 231 of the optical fiber 23 is a bare fiber. The bare optical fiber after the coating of the optical fiber is removed serves as a first positioning section of the optical fiber. But may also be in other embodiments; the first positioning segment may not be coated.
In the preferred embodiment of the present invention, a routing capacitor 6 is disposed between the PD array and the TIA transimpedance amplifier 5, and the two adjacent PD arrays are bonded and communicated by gold wires (not shown in the figure). The PD photoelectric detector converts an optical signal into an electric signal, the TIA trans-impedance amplifier amplifies and analyzes the electric signal of the PD, the PD and the TIA trans-impedance amplifier are in gold wire bonding communication, the height difference between the PD and the TIA is about 0.4mm, the TIA thickness is about 0.15mm, the routing length can be shortened by adopting a routing capacitor, and in other embodiments, the method can also comprise the following steps: if there is no requirement for the length of the wire bonding, the wire bonding capacitor can be omitted.
In a preferred embodiment of the present invention, the optical fiber 23 further includes a second positioning section 232, the first positioning section 231 and the second positioning section 232 are located at different positions in the longitudinal direction of the optical fiber 23, and the second positioning section 232 and a portion of the first positioning section 231 connected thereto are embedded and positioned in the optical gel 25 on the base plate 21. The optical cement plays a role in fixing and protecting the optical fiber.
In a preferred embodiment of the present invention, the substrate 1 is provided with a recessed area 11 for embedding the bottom plate 21. Since the optical fiber and the ball lens are embedded in the V-groove and the V-groove is disposed on the base plate, if the base plate is directly mounted on the substrate, the optical axis positions of the optical fiber and the ball lens are high, and the PD array is also raised to realize the optical transmission therebetween. Through setting up the depressed area, the bottom plate inlays and establishes in the depressed area, and optic axis position of optic fibre and ball lens is lower, and the PD array does not need to carry out bed hedgehopping and handles and also can realize the light transmission between them.
In a preferred embodiment of the present embodiment, the base plate 21 and the pressing plate 22 are connected by UV glue, and the module is connected to the substrate 1 by silver glue and structural glue. Different parts of the light engine structure are connected through glue, passive connection is achieved, and the passive connection can be achieved without photoelectric monitoring.
The following describes a method for fabricating the integrated light engine structure, including the following steps:
s1, assembling the optical fiber array and the lens array together to obtain a first assembly;
s2, assembling the PD array and the TIA trans-impedance amplifier together to obtain a second assembly;
s3, carrying out passive mounting on the first assembly and the second assembly according to the mark points on the substrate 1;
wherein, step S1 and step S2 are not performed in sequence and are performed before step S3.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, and is provided in the accompanying drawings. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An integrated light engine structure comprising a substrate and an assembly disposed on the substrate, the assembly comprising:
the optical fiber array is used for outputting light beams, and comprises a bottom plate, a pressing plate and a plurality of optical fibers, wherein the bottom plate is provided with a positioning groove array, the positioning groove array comprises a plurality of V-shaped grooves which are parallel to each other, the optical fibers comprise first positioning sections forming light emitting surfaces, the first positioning sections of the optical fibers are respectively embedded in the V-shaped grooves, and the pressing plate tightly presses the first positioning sections of the optical fibers in the V-shaped grooves;
the lens array is used for focusing the light beams and comprises a plurality of lenses which are respectively arranged on the light emergent sides of the optical fibers;
the PD array is used for receiving the focused light beams and converting optical signals into electric signals, and comprises a plurality of photodetectors which are respectively arranged on the light emergent sides of the lenses;
the TIA transimpedance amplifier is used for receiving the electric signal and amplifying the electric signal;
the optical fiber positioning device is characterized in that the lens is a spherical lens with the same diameter as the first positioning section of the optical fiber, the lenses are respectively arranged in the V-shaped grooves, and the signal receiving surfaces of the photoelectric detectors are respectively opposite to the notches of the V-shaped grooves.
2. The integrated optical engine structure of claim 1, wherein the light-emitting surface of the optical fiber is an inclined surface that is not perpendicular to the optical axis of the optical fiber, and the light-emitting surface of the optical fiber and the ball lens are coated with antireflection films.
3. The integrated optical engine structure of claim 1, wherein the ball lens is a silicon lens, the outer diameter of the first positioning segment of the optical fiber and the ball lens is 125um, the distance between the ball lens and the light emitting surface of the optical fiber is 20-30um, and the distance between the ball lens and the receiving surface of the photodetector is 30-40um.
4. The integrated light engine structure of claim 1, wherein the walls of the V-shaped groove are planar or convex arcuate surfaces.
5. The integrated light engine architecture of claim 1, wherein the first positioning segment of the optical fiber is a bare optical fiber.
6. The integrated optical engine structure of claim 1, wherein a wire bond capacitor is disposed between the PD array and the TIA transimpedance amplifier and the adjacent PD array and TIA transimpedance amplifier communicate with each other via gold wire bonding.
7. The integrated light engine structure of claim 1, wherein the optical fiber further comprises a second alignment segment, the first alignment segment and the second alignment segment being located at different positions along the length of the optical fiber, the second alignment segment and a portion of the first alignment segment adjoining the second alignment segment being embedded in an optical gel located on the backplane.
8. The integrated light engine structure of claim 1, wherein the substrate has a recessed region for embedding the base plate.
9. The integrated light engine structure of claim 1, wherein the base plate and the pressure plate are attached by UV glue and the assembly is attached to the substrate by silver glue and structural glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220391481.3U CN217561783U (en) | 2022-02-24 | 2022-02-24 | Integrated optical engine structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220391481.3U CN217561783U (en) | 2022-02-24 | 2022-02-24 | Integrated optical engine structure |
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| Publication Number | Publication Date |
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| CN217561783U true CN217561783U (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220391481.3U Active CN217561783U (en) | 2022-02-24 | 2022-02-24 | Integrated optical engine structure |
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| CN (1) | CN217561783U (en) |
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- 2022-02-24 CN CN202220391481.3U patent/CN217561783U/en active Active
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Address after: No. 168 Jiaotong North Road, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou Zhuoyu Photon Technology Co.,Ltd. Address before: 215200 Hengdao 88, Wujiang Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee before: HENGTONG ROCKLEY TECHNOLOGY Co.,Ltd. |
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