NL2031954A - Photoelectric coupling device - Google Patents

Photoelectric coupling device Download PDF

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Publication number
NL2031954A
NL2031954A NL2031954A NL2031954A NL2031954A NL 2031954 A NL2031954 A NL 2031954A NL 2031954 A NL2031954 A NL 2031954A NL 2031954 A NL2031954 A NL 2031954A NL 2031954 A NL2031954 A NL 2031954A
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NL
Netherlands
Prior art keywords
array
glass substrate
coupling device
photoelectric coupling
cover plate
Prior art date
Application number
NL2031954A
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Dutch (nl)
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NL2031954B1 (en
Inventor
Gan Fei
Li Liang
Ding Xiaoliang
Wang Jun
Liang Wei
Tian Guixia
Original Assignee
Suzhou Surinno Photonics Tech Co Ltd
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Publication of NL2031954A publication Critical patent/NL2031954A/en
Application granted granted Critical
Publication of NL2031954B1 publication Critical patent/NL2031954B1/en

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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
    • 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
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4206—Optical features
    • 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
    • G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections

Abstract

The present application discloses a photoelectric coupling device, which includes a Fiber Array (FA) or a Planar Lightwave Circuit (PLC) array, a glass substrate, a glass cover plate, a dioptric focusing lens, a Photoelectric Diode (PD) array, and a heat sink. The glass substrate is arranged on the glass cover plate. The FA or the PLC array is arranged between the glass substrate and the glass cover plate. A front end of each of the glass substrate and the glass cover plate is provided with a first abutting surface, and a rear end of the dioptric focusing lens is provided with a second abutting surface which abuts against the first abutting surface. A total reflection surface is arranged on the dioptric focusing lens, and a spherical array is arranged at the bottom of the dioptric focusing lens. The PD array is mounted on the heat sink. PDs in the PD array are arranged in one-to-one correspondence with focusing spheres in the spherical array. The light output from the FA or the PLC array enters the dioptric focusing lens from the second abutting surface. The light entering the dioptric focusing lens is reflected to the focusing spheres through the total reflection surface. The focusing spheres focus the light to photosensitive surfaces of the PDs, so as to realize the coupling with the PDs. The present application has the advantages of simple structure, convenience in operation, high coupling efficiency, and low loss.

Description

PHOTOELECTRIC COUPLING DEVICE
FIELD OF THE INVENTION
The present application relates to the technical field of optical communication, and in particular, to a photoelectric coupling device.
DESCRIPTION OF THE RELATED ART
With the emergence of intelligent devices, cloud computing, and Internet of Things, the network demand is increasing. It is urgent to improve the transmission rate of a system, and transmission systems with 100G and higher rate are gradually being applied. For a high-speed optical module, the transmission rate of a device is generally improved in a form of multi-channel chip integration at present. A photosensitive surface of a high-rate Photoelectric Diode (PD) is smaller. In order to improve the coupling efficiency of a PD array, one method is to use the PD array etched with a silicon lens. The coupling efficiency and the actual assembly operation are simple, but this manufacturing is complex and high-cost. The other method is to mount a lens array on the front of the PD array to converge an incident beam to improve the coupling efficiency. However, the optical path has a complex structure and needs a plurality of assembly steps, and thus is time-consuming and difficult to operate. In Patent Application No. 201310433022.2, a reflecting mirror and a focusing lens array are fixed together through a structural part, and the emergent light of a Planar Lightwave Circuit (PLC) is coupled into a photosensitive surface of the PD, which adopt more structural parts for fixing and alignment, the structural parts are numerous and complex, and thus need multiple assembly steps ‚and the operation is very cumbersome.
SUMMARY OF THE INVENTION
A technical problem to be solved by the present application is to provide a photoelectric coupling device which has a simple structure, high coupling efficiency aswell as low loss.
In order to solve the abovementioned problem, the present application provides a photoelectric coupling device, including: a Fiber Array (FA) or a Planar Lightwave Circuit (PLC) array; a glass substrate and a glass cover plate, wherein the glass substrate is arranged onthe glass cover plate, the FA or the PLC array is arranged between the glass substrate and the glass cover plate, and a front end of each of the glass substrate and the glass cover plate is provided with a first abutting surface; a dioptric focusing lens, wherein a rear end of the dioptric focusing lens is provided with a second abutting surface which abuts against the first abutting surface, a total reflection surface is arranged on the dioptric focusing lens, and a spherical array is arranged at the bottom of the dioptric focusing lens; a Photoelectric Diode (PD) array and a heat sink, the PD array is mounted on the heat sink, and PDs in the PD array are arranged in one-to-one correspondence with focusing spheres in the spherical array.
The light output from the FA or the PLC array enters the dioptric focusing lens through the second abutting surface; the light entering the dioptric focusing lens is reflected to the focusing spheres by the total reflection surface; and the focusing spheres focus the light to photosensitive surfaces of the PDs, so as to realize the coupling with the PDs.
Preferably , each of the first abutting surface and the second abutting surface has an angle for anti-reflection.
More preferably, the angle for anti-reflection is 4-6°.
Preferably, the imaging ratio of the dioptric focusing lens is 1:1.
Preferably, the single-mode laser mode field output by the FA or the PLC array has a diameter of 9 um. The photosensitive surface of the PD has a diameter of 14-20 um. A receiving angle is 0-14°, and the diameter of a focusing spot is 9 um.
A V-shaped groove is formed on the glass substrate for accommodating the FA.
PLC is formed by etching and fixed on the glass substrate by an optical clear adhesive. The glass substrate and the glass cover plate are bonded by an optical clear adhesive, to fix the FA or the PLC array.
Preferably, a rear end of the glass substrate protrudes from the glass substrate to form an extension part; and the FA or the PLC array are bonded to the bottom of the extension part by the optical clear adhesive.
Preferably, the first abutting surface and the second abutting surface are bonded by the optical clear adhesive.
Preferably a refraction angle of the total reflection surface is greater than a total reflection angle of a material thereof by +8°, so as to realize total reflection.
Preferably, the dioptric focusing lens is obtained by molding glass with a high refractive index, performing silicon-based etching, or performing hot-processing on a Polycarbonate (PC) material.
The present application has the following beneficial effects.
In the photoelectric coupling device of the present application, a dioptric focusing lens is arranged, and the total reflection surface and the focusing spheres are provided on the dioptric focusing lens, so that the light output from the FA or the
PLC array directly enter the dioptric focusing lens and is reflected to the focusing spheres through the total reflection surface, and the light is focused to the photosensitive surfaces of the PDs through the focusing spheres, so as to realize the coupling with the PDs. The photoelectric coupling device has the advantages of simple structure, convenience in operation, high coupling efficiency, and low loss.
Meanwhile, the total reflection angle is used, and a high-reflection film does not need to be plated, so that the cost is reduced.
The abovementioned description is only an overview of the technical solutions of the present application. In order to understand the technical means of the present application more clearly and implement the technical means according to the specification, and in order to make the abovementioned and other objectives, features, and advantages of the present application more apparent and easy to understand, the preferred embodiments are particularly provided below and are described in detail with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates an axonometric view of a photoelectric coupling device in a preferred embodiment of the present application;
FIG. 2 shows a side view of the photoelectric coupling device in a preferred embodiment of the present application;
FIG. 3 shows a schematic structural diagram of a dioptric focusing lens in a preferred embodiment of the present application; and
FIG. 4 illustrates an optical path of the dioptric focusing lens and PDs in a preferred embodiment of the present disclosure.
Reference numerals: 1, optical clear adhesive; 10, FA or PLC array; 20, glass substrate; 21, extension part; 30, glass cover plate; 40, dioptric focusing lens, 41, second abutting surface; 42, total reflection surface; 43, focusing sphere; 50, PD; and 60, heat sink.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present disclosure is further described in detail below with reference to accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present disclosure, but the illustrated embodiments are not regarded as a limitation of the present disclosure.
As shown in FIGs. 1 to 3, the photoelectric coupling device in a preferred embodiment of the present application includes an FA or PLC array 10, a glass substrate 20, a glass cover plate 30, a dioptric focusing lens 40, PDs 50, and a heat sink 60.
The glass substrate 20 is arranged on the glass cover plate 30. The FA or the PLC array 10 is arranged between the glass substrate 20 and the glass cover plate 30.
A front end of each of the glass substrate 20 and the glass cover plate 30 is provided with a first abutting surface, and a rear end of the dioptric focusing lens 40 is provided with a second abutting surface 41 which abuts against the first abutting surface. The dioptric focusing lens 40 is provided with a total reflection surface 42 , and a spherical array is arranged at the bottom of the dioptric focusing lens 40. The
PD array is mounted on the heat sink 60. The PDs 50 in the PD array are arranged in one-to-one correspondence with focusing spheres 43 in the spherical array.
As shown in FIG. 4, the light output from the FA or the PLC array 10 enters the dioptric focusing lens 40 through the second abutting surface 41; the light entering the dioptric focusing lens 40 is reflected to the focusing spheres 43 by the total reflection surface 42; and the focusing spheres 43 focus the light to photosensitive surfaces of the PDs 50, to realize the coupling with the PDs 50.
According to the photoelectric coupling device of the present disclosure, the dioptric focusing lens is provided, and the total reflection surface and the focusing spheres are formed on the dioptric focusing lens, so that the light output from the FA or the
PLC array directly enter the dioptric focusing lens and is reflected to the focusing spheres by the total reflection surface, and the light is focused to the photosensitive surfaces of the PDs through the focusing spheres, so as to realize the coupling with the PDs. The photoelectric coupling device has the advantages of simple structure, convenience in operation, high coupling efficiency, and low loss. Meanwhile, the total reflection angle is used, and a high-reflection film does not need to be plated, so that the cost is reduced.
In some embodiments, the first abutting surface and the second abutting surface 41 are provided with angles for anti-reflection to achieve an anti-reflection effect.
Optionally, the angle for anti-reflection is 4-6°. The angle for anti-reflection is formed between a abutting surface and a vertical direction of an optical path.
In some embodiments, the imaging ratio of the dioptric focusing lens 40 is 1:1, and an image focal length is about 200 um, which can ensure high tolerance of a 5 relative position between the focusing spheres 43 and the photosensitive surfaces of the PDs 50 during mounting, thereby facilitating the operation of mounting.
Optionally, the diameter of a single-mode laser mode field output by the FA or the
PLC array 10 is 9 um; the photosensitive surface of the PD 50 has a diameter of 14-20; a receiving angle is 0-14°; the diameter of a focusing spot is 9 um; and the
PD mounting has a large tolerance of about +2 .5 um.
Optionally, a V-shaped groove is formed on the glass substrate 20 for accommodating the FA ; and the glass substrate 20 and the glass cover plate 30 are bonded by an optical clear adhesive 1, so as to fix the FA or the PLC array 10.
Further, a rear end of the glass substrate 20 protrudes from the glass substrate 20 to form an extension part 21, and the FA or the PLC array 10 are bonded to the bottom of the extension part 21 by the optical clear adhesive 1, so as to ensure the structure stability of the FA or the PLC array 10.
Optionally, the first abutting surface and the second abutting surface 41 are bonded by the optical clear adhesive 1, which achieves the effects of anti-reflecting and curing.
In some embodiments, a refraction angle of the total reflection surface 42 is greater than a total reflection angle of a material thereof by +8°, to realize the total reflection function.
Optionally, the dioptric focusing lens 40 is obtained by molding glass with a high refractive index, performing silicon-based etching, or performing hot-processing on a PC material. The photoelectric coupling device has the advantages of simple preparation, high integration level, and high size precision.
During assembling, firstly the FA or the PLC array 10 is clamped by the glass substrate 20 and the glass cover plate 30, and is bonded and fixed using an optical clear adhesive, to obtain a first structure; then, the first structure and the dioptric focusing lens 40 are mounted together, and then the first abutting surface and the second abutting surface 41 are bonded through the optical clear adhesive 1, so as to form a second structure; and then, the PD array is mounted on the heat sink 60, the second structure and the PDs 50 are subjected to active coupling, and the glass substrate 20 and the heat sink 60 are bonded by the optical clear adhesive 1, so as to complete assembling.
The above embodiments are only preferred embodiments for fully describing the present application, and the scope of protection of the present application is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present application all fall within the scope of protection of the present application. The scope of protection of the present application is determined by the appended claims.

Claims (10)

Conclusies:Conclusions: 1. Een foto-elektrische koppelingsinrichting, omvattende: een vezelserie (FA) of een planaire lichtgolfschakeling (PLC) serie; een glassubstraat en een glasdekplaat, waarbij het glassubstraat aangebracht is op de glasdekplaat, de FA of de PLC serie gerangschikt is tussen het glassubstraat en de glasdekplaat, en een voorzijde van elk van het glassubstraat en de glasdekplaat is voorzien van een eerste aangrenzend opperviak; een dioptrisch focuslens, waarbij een achterzijde van de dioptrisch gefocusseerde lens is voorzien van een tweede aangrenzend oppervlak dat grenst aan het eerste aangrenzende oppervlak, een totaal reflectie-opperviak gerangschikt is op de dioptrisch gefocusseerde lens, en een sferische serie gerangschikt is aan de onderzijde van de dioptrisch gefocusseerde lens; een foto-elektrische diode (PD) serie en een koellichaam, waarbij de PD serie gemonteerd is op het koellichaam, en de PDs in de PD serie één op één zijn gerangschikt overeenkomstig met de gefocusseerde sferen in de sferische serie; de lichtopbrengst van de FA of de PLC serie de dioptrisch gefocusseerde lens betreedt door het tweede aangrenzende oppervlak; het licht dat de dioptrisch gefocusseerde lens betreedt is gereflecteerd naar de gefocusseerde sferen door het totaal reflectie-opperviak; en de gefocusseerde sferen focusseren het licht op fotogevoelige oppervlakten van de PDs, om de koppeling met de PDs te bewerkstelligen.A photoelectric coupling device comprising: a fiber array (FA) or a planar light wave circuit (PLC) array; a glass substrate and a glass cover plate, the glass substrate being mounted on the glass cover plate, the FA or the PLC series being arranged between the glass substrate and the glass cover plate, and a front side of each of the glass substrate and the glass cover plate having a first adjacent surface; a dioptrically focused lens, wherein a back side of the dioptrically focused lens has a second adjacent surface adjacent to the first adjacent surface, a total reflection surface is arranged on the dioptrically focused lens, and a spherical array is arranged on the underside of the dioptrically focused lens; a photoelectric diode (PD) array and a heat sink, wherein the PD array is mounted on the heat sink, and the PDs in the PD array are arranged one-to-one corresponding to the focused spheres in the spherical array; the light output from the FA or the PLC series enters the dioptrically focused lens through the second adjacent surface; the light entering the dioptrically focused lens is reflected to the focused spheres by the total reflection surface; and the focused spheres focus the light onto photosensitive surfaces of the PDs to effect coupling with the PDs. 2. De foto-elektrische koppelingsinrichting volgens conclusie 1, waarbij elk van het eerste aangrenzende oppervlak en het tweede aangrenzende oppervlak een hoek voor antireflectie heeft.The photoelectric coupling device according to claim 1, wherein each of the first adjacent surface and the second adjacent surface has an anti-reflection angle. 3. De foto-elektrische koppelingsinrichting volgens conclusie 2, waarbij de hoek voor antireflectie 4-6° is.The photoelectric coupling device according to claim 2, wherein the anti-reflection angle is 4-6°. 4. De foto-elektrische koppelingsinrichting volgens conclusie 1, waarbij de beeldverhouding van de dioptrisch gefocusseerde lens 1:1 is.The photoelectric coupling device according to claim 1, wherein the aspect ratio of the dioptrically focused lens is 1:1. 5. De foto-elektrische koppelingsinrichting volgens conclusie 4, waarbij een monomodus laser veldmodus opbrengst door de FA of de PLC serie een diameter van 9 um heeft; het fotogevoelige oppervlak van de PD een diameter van 14-20 um heeft; een ontvangende hoek 0-14° is; en de diameter van een gefocusseerd punt 9 um is.The photoelectric coupling device according to claim 4, wherein a single mode laser field mode output by the FA or the PLC series has a diameter of 9 µm; the photosensitive surface of the PD has a diameter of 14-20 µm; a receiving angle is 0-14°; and the diameter of a focused point is 9 µm. 6. De foto-elektrische koppelingsinrichting volgens conclusie 1, waarbij een V- vormige groef op het glassubstraat is gevormd voor het accommoderen van de FA; en het glassubstraat en de glasdekplaat zijn verbonden door een optisch doorzichtige lijm, om de FA of de PLC serie te fixeren.The photoelectric coupling device according to claim 1, wherein a V-shaped groove is formed on the glass substrate to accommodate the FA; and the glass substrate and the glass cover plate are bonded by an optically transparent adhesive, to fix the FA or the PLC series. 7. De foto-elektrische koppelingsinrichting volgens conclusie 6, waarbij een achterzijde van het glassubstraat uitsteekt van het glassubstraat om een verlengd deel te vormen; en de FA of de PLC serie zijn verbonden aan de onderzijde van het verlengde deel door de optisch doorzichtige lijm.The photoelectric coupling device according to claim 6, wherein a rear side of the glass substrate protrudes from the glass substrate to form an elongated portion; and the FA or the PLC series are bonded to the bottom of the extended part by the optically clear adhesive. 8. De foto-elektrische koppelingsinrichting volgens conclusie 1, waarbij het eerste aangrenzende oppervlak en het tweede aangrenzende oppervlak zijn verbonden door een optisch doorzichtige lijm.The photoelectric coupling device of claim 1, wherein the first adjacent surface and the second adjacent surface are bonded by an optically transparent adhesive. 9. De foto-elektrische koppelingsinrichting volgens conclusie 1, waarbij een refractiehoek van het totaal reflectie-oppervlak groter is dan een totaal reflectiehoek van een materiaal daarvan door +8°, om totale reflectie te bewerkstelligen.The photoelectric coupling device according to claim 1, wherein a refraction angle of the total reflection surface is greater than a total reflection angle of a material thereof by +8° to achieve total reflection. 10. De foto-elektrische koppelingsinrichting volgens conclusie 1, waarbij de dioptrisch gefocusseerde lens is verkregen door glasgieten met een hoge brekingsindex, het uitvoeren van silicone-gebaseerd etsen, of het uitvoeren van heet bewerken op een polycarbonaat (PC) materiaal.The photoelectric coupling device according to claim 1, wherein the dioptrically focused lens is obtained by high-refractive-index glass molding, silicone-based etching, or hot-working on a polycarbonate (PC) material.
NL2031954A 2021-07-26 2022-05-20 Photoelectric coupling device NL2031954B1 (en)

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NL2031954B1 (en) 2024-01-08

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