WO2021088181A1 - 一种透镜系统 - Google Patents

一种透镜系统 Download PDF

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Publication number
WO2021088181A1
WO2021088181A1 PCT/CN2019/123612 CN2019123612W WO2021088181A1 WO 2021088181 A1 WO2021088181 A1 WO 2021088181A1 CN 2019123612 W CN2019123612 W CN 2019123612W WO 2021088181 A1 WO2021088181 A1 WO 2021088181A1
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WIPO (PCT)
Prior art keywords
lens
sub
incident
light beam
lens system
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PCT/CN2019/123612
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English (en)
French (fr)
Inventor
罗超
何明阳
张尔康
付永安
Original Assignee
武汉光迅科技股份有限公司
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Publication of WO2021088181A1 publication Critical patent/WO2021088181A1/zh

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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
    • G02B6/4206—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
    • G02B6/4201—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

Definitions

  • This application relates to the field of optical technology, and in particular to a lens system.
  • the bandwidth provided by high-speed and short-distance transmission optical modules has also increased.
  • two sets of output chips that can provide 100Gbps bandwidth are packaged together, so that the high-speed short-distance transmission optical module can provide 200Gbps bandwidth.
  • How to couple the optical paths of two or more sets of output chips is a problem that needs to be solved.
  • an embodiment of the present application provides a lens system capable of coupling the optical paths of two or more sets of output chips.
  • An embodiment of the present application provides a lens system, the lens system at least comprising: a first card slot and a second card slot;
  • the lower surface of the lens system is provided with a first sub-lens and a second sub-lens along the horizontal direction;
  • the first side surface of the lens system is provided with a third sub-lens and a fourth sub-lens along a vertical direction;
  • the light beam emitted from the first light source outside the lens system After the light beam emitted from the first light source outside the lens system is collimated by the first sub-lens, it is incident on the first reflecting surface of the first slot at a first angle; and incident on the first reflecting surface
  • the light beam reflected by the first reflecting surface enters the third sub-lens in a direction perpendicular to the incident on the first reflecting surface; the light beam incident to the third sub-lens passes through the third sub-lens Output after focusing;
  • the light beam emitted from the second light source outside the lens system After the light beam emitted from the second light source outside the lens system is collimated by the second sub-lens, it is incident on the second reflecting surface of the second slot at the first angle; The light beam on the reflective surface is reflected by the second reflective surface and enters the fourth sub-lens in a direction perpendicular to the incident on the second reflective surface; the light beam incident on the fourth sub-lens passes through the fourth sub-lens The sub-lens is focused and output.
  • the distance between the first sub-lens and the first side surface is smaller than the distance between the second sub-lens and the first side surface
  • the third sub-lens is located below the fourth sub-lens.
  • the third sub-lens includes at least one convex lens; and/or, the fourth sub-lens includes at least one convex lens.
  • the second side surface and the third side surface of the first card slot are respectively provided with a first fixing member and a second fixing member, and the first fixing member and the second fixing member are located on the same horizontal plane.
  • the first fixing member and the second fixing member are configured to limit the position of the glass slide inserted into the first card slot
  • the glass slide is configured to make the refractive index inside the first slot coincide with the refractive index of the lens system.
  • the refractive index of the glue is the same as the refractive index of the lens system.
  • the material of the glass slide is the same as the material of the lens system.
  • the lower surface of the lens system is provided with a fifth sub-lens and a sixth sub-lens along a horizontal direction;
  • the light beam emitted from the third light source outside the lens system is collimated by the fifth sub-lens, it is incident on the first reflecting surface at the first angle; the light beam incident on the first reflecting surface passes through The reflection of the first reflective surface is incident on the third sub-lens in a direction perpendicular to the incident on the first reflective surface; the light beam incident on the third sub-lens is focused by the third sub-lens and then output ;
  • the light beam emitted from the fourth light source outside the lens system is collimated by the sixth sub-lens, it is incident on the second reflecting surface at the first angle; the light beam incident on the second reflecting surface passes through The reflection of the second reflective surface is incident on the fourth sub-lens in a direction perpendicular to the incident on the second reflective surface; the light beam incident on the fourth sub-lens is focused by the fourth sub-lens and then output .
  • the distance between the fifth sub-lens and the first side surface is equal to the distance between the first sub-lens and the first side surface
  • the distance between the sixth sub-lens and the first side surface is equal to the distance between the second sub-lens and the first side surface.
  • the lens system further includes: a third card slot
  • the lower surface of the lens system is provided with a seventh sub-lens and a ninth sub-lens along the horizontal direction;
  • the first side surface of the lens system is provided with an eighth sub-lens along a vertical direction;
  • the seventh sub-lens is located between the first sub-lens and the second sub-lens in the horizontal direction; the ninth sub-lens is located between the fifth sub-lens and the sixth sub-lens in the horizontal direction;
  • the eighth sub-lens is located between the third sub-lens and the fourth sub-lens in the vertical direction;
  • the third card slot is located between the first card slot and the second card slot;
  • the light beam emitted by the fifth light source outside the lens system After the light beam emitted by the fifth light source outside the lens system is collimated by the seventh sub-lens, it is incident on the third reflection surface of the third slot at the first angle; and incident on the third reflection
  • the light beam on the surface is reflected by the third reflective surface and enters the eighth sub-lens in a direction perpendicular to the incident on the third reflective surface; the light beam incident on the eighth sub-lens passes through the eighth sub-lens Output after the lens is focused;
  • the light beam emitted by the sixth light source outside the lens system is collimated by the eighth sub-lens, it is incident on the third reflective surface at the first angle; the light beam incident on the third reflective surface passes through the The reflection of the third reflective surface is incident on the ninth sub-lens in a direction perpendicular to the incident on the third reflective surface; the light beam incident on the ninth sub-lens is focused by the ninth sub-lens and then output.
  • the present application provides a lens system, the lens system includes: a first card slot and a second card slot; the lower surface of the lens system is provided with a first sub-lens and a second sub-lens along a horizontal direction; the lens system The first side surface is provided with a third sub-lens and a fourth sub-lens along the vertical direction; after the light beam emitted from the first light source outside the lens system is collimated by the first sub-lens, it is incident at a first angle to the The first reflective surface of the first card slot; the light beam incident on the first reflective surface is reflected by the first reflective surface and enters the third sub in a direction perpendicular to the incident on the first reflective surface Lens; the light beam incident on the third sub-lens is output after being focused by the third sub-lens; the light beam emitted from the second light source outside the lens system is collimated by the second sub-lens, and then the first Angle incident on the second reflective surface of the second slot; the light beam
  • the embodiment of the present application shortens the multiple coupling of the lens of the high-speed short-distance transmission optical module in the prior art to a single coupling, which improves production efficiency and reduces production complexity.
  • the use of the lens system provided by the present application for high-speed short-distance transmission optical module for optical path coupling can also effectively avoid performance degradation and damage caused by the connection of the optical fiber array connecting the lens system and the optical fiber connector.
  • the embodiment of the present application also provides a lens system. By adding a first fixing part and a second fixing part in the first slot of the lens system, the first slot can be fitted with a glass slide.
  • An embodiment of the present application also provides a lens system.
  • the lens system at least includes: a first card slot, a second card slot, and a third card slot.
  • a single coupling is realized. Compared with the existing solution, the coupling times are reduced, the production efficiency is improved, and the production complexity is reduced.
  • the lens system provided in the embodiments of the present application can effectively avoid the performance degradation and damage problems caused by the optical fiber array when connecting the lens system and the optical fiber connector.
  • FIG. 1 is a schematic diagram of the structure of realizing the coupling of two sets of chips through two lenses in the prior art
  • FIG. 2 is a schematic diagram 1 of an optional structure of a lens system provided by an embodiment of the application;
  • FIG. 3 is a bottom view of schematic diagram 1 of an optional structure of a lens system provided by an embodiment of the application;
  • FIG. 4 is a cross-sectional view of schematic diagram 1 of an optional structure of a lens system provided by an embodiment of the application;
  • FIG. 5 is a schematic diagram of the application of the lens system provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of an optional structure of the first slot of the lens system provided by an embodiment of the application.
  • FIG. 7 is a second schematic diagram of an optional structure of a lens system provided by an embodiment of the application.
  • FIG. 8 is a bottom view of a second schematic diagram of an optional structure of a lens system provided by an embodiment of the application.
  • FIG. 9 is a cross-sectional view of a second schematic diagram of an optional structure of a lens system provided by an embodiment of the application.
  • the high-speed short-distance transmission optical module that can provide 200Gbps or 400Gbps bandwidth can be regarded as an upgrade of the Quad Small Form-factor Pluggable (QSFP) package as a whole. Accordingly, the high-speed short-distance transmission optical module The number of chips inside the module has also increased exponentially. For example, by packaging two sets of 100G input chips together, the high-speed short-distance transmission optical module can achieve 200Gbps bandwidth. Therefore, when the optical path of the input chip is coupled, two independent lenses need to be coupled twice.
  • Figure 1 shows a schematic diagram of two couplings using two independent lenses:
  • the first chip After the first chip is coupled to the optical path through the lens 101, it is transmitted to the optical fiber connector 105 through the optical fiber array 103; the second chip is coupled to the optical path through the lens 102 and transmits to the optical fiber connector 105 through the optical fiber array 104; the optical fiber array 103, the optical fiber array 104 and The optical fiber connector 105 constitutes a two-in-one optical fiber connector. Through the two-in-one optical fiber connector, two optical paths passing through the optical fiber array 103 and the optical fiber array 105 can be integrated and output in an array.
  • the above solution can use the QSFP optical module packaging process and lens, the difference is that in the QSFP optical module packaging process, one optical path coupling is increased to two optical path couplings.
  • the two optical path couplings increase the time cost.
  • the two-in-one optical fiber connector needs to take into account the connection of the lens 101 and the lens 102 at the same time, and as shown in FIG. 1, the distance between the lens 101 and the optical fiber connector 105 is the same as the distance between the lens 102 and the optical fiber connector 105.
  • the length of the optical fiber array 103 is too long, the length of the optical fiber array 103 needs to be accurate; if the length of the optical fiber array 103 is too short, the stress of the optical fiber connector 105 will be increased, which will easily damage the optical fiber or cause optical path displacement; if the length of the optical fiber array 103 is If it is too long, the optical fiber array 103 will be arched, and will be pressed against the optical fiber array during subsequent packaging, causing damage.
  • this application proposes a lens system that can solve the technical problems and shortcomings that cannot be solved in the prior art solutions.
  • FIG. 2 shows a schematic diagram of an optional structure of a lens system provided by an embodiment of the present application
  • FIG. 3 shows a bottom view of a lens system provided by an embodiment of the present application corresponding to FIG. 2;
  • 'I a cross-sectional view of the lens system cut through the boundary, and the description will be based on each part.
  • An embodiment of the present application provides a lens system 200.
  • the lens system 200 at least includes a first slot 204 and a second slot 202.
  • the lower surface of the lens system 200 is provided with a first sub-lens 210 and a second sub-lens 211 along the horizontal direction.
  • the first side surface 201 of the lens system 200 is provided with a third sub-lens 203 and a fourth sub-lens 209 along the vertical direction.
  • the distance between the first sub-lens 210 and the first side surface 201 is smaller than the distance between the second sub-lens 211 and the first side surface 201; along the vertical direction of the first side surface 201,
  • the third sub-lens 203 is located below the fourth sub-lens 209.
  • the first reflective surface 207 of the first slot 204 is parallel to the second reflective surface 208 of the second slot 202, and the included angle with the horizontal plane is 45 degrees. In this way, it can be ensured from the first sub-lens
  • the incident light beam 210 enters the first reflecting surface 207 at an incident angle of 45 degrees, is reflected by the first reflecting surface 207, and exits the third sub-lens 203 at a reflection angle of 45 degrees; it can also be ensured from the second sub-lens 211
  • the incident light beam enters the second reflecting surface 208 at an incident angle of 45 degrees, is reflected by the second reflecting surface 208, and exits the fourth sub-lens 209 at a reflection angle of 45 degrees.
  • the lower surface of the lens system 200 is provided with a fifth sub-lens 212 and a sixth sub-lens 213 along the horizontal direction.
  • the distance between the fifth sub-lens 212 and the first side surface 201 is equal to the distance between the first sub-lens 210 and the first side surface 201;
  • the distance between the lens 213 and the first side surface 201 is equal to the distance between the second sub-lens 211 and the first side surface 201.
  • the first sub-lens 210 includes at least one convex lens; and/or, the second sub-lens 211 includes at least one convex lens.
  • the third sub-lens 203 includes at least one convex lens; and/or, the fourth sub-lens 209 includes at least one convex lens.
  • the third sub-lens 203 includes a first convex lens 2031 and a second convex lens 2032.
  • One of the light beams emitted from the first light source 301 outside the lens system 200 passes through the first sub-lens After 210 is collimated, it is reflected by the first reflecting surface 207 and enters the first convex lens 2031; one of the light beams emitted from the third light source outside the lens system 200 is collimated by the second convex lens 2032 , Reflected by the first reflecting surface 207, and incident into the fifth sub-lens 212.
  • the first convex lens 2031 and the second convex lens 2032 respectively focus the received light beam, and send the focused light beam to the light array 304 outside the lens system.
  • the lower surface of the lens system is provided with a first groove 216
  • the first groove 216 is provided with a second groove 217
  • the first sub-lens, the second sub-lens, and the second sub-lens The five sub-lens and the sixth sub-lens are disposed in the second groove 217.
  • the first side surface 201 of the lens system is provided with a third groove 214
  • the third groove 214 is provided with a fourth groove 215
  • the third sub-lens 203 and the first The quadruple lens 209 is arranged in the fourth groove 215.
  • FIGS. 2, 3, and 4 The working principle of the lens system described in the embodiment of the present application will be described in conjunction with the above-mentioned FIGS. 2, 3, and 4 and the schematic diagrams of the lens system application provided in the embodiments of the present application.
  • the light beam emitted from the first light source 301 outside the lens system 200 is collimated by the first sub-lens 210, and then enters the first reflection of the first slot 204 at a first angle.
  • Surface 207; the light beam incident on the first reflective surface 207 is reflected by the first reflective surface 207 and enters the third sub-lens 203 in a direction perpendicular to the incident on the first reflective surface 207;
  • the light beam of the third sub-lens 203 is focused by the third sub-lens 203 and then output to the optical fiber array 304 outside the lens system.
  • the first light source is a first chip outside the lens system 200, and the light beam emitted by the first light source 301 is a light beam emitted by the first chip 301.
  • the first external chip of the lens system 200 is a Vertical-Cavity Surface-Emitting Laser (VCSEL) chip.
  • VCSEL Vertical-Cavity Surface-Emitting Laser
  • the first angle is 45 degrees
  • the included angle between the first reflective surface 207 and the horizontal plane is 135 degrees.
  • the light beam is incident on the first reflective surface 207 at an incident angle of 45 degrees, and passes through the first reflective surface 207. After being reflected by the reflective surface 207, the light beam is output from the first reflective surface 207 at a reflection angle of 45 degrees, and then enters the third sub-lens 203.
  • the light beam emitted from the second light source 302 outside the lens system 200 is collimated by the second sub-lens 211, and then enters the second reflection of the second slot 202 at a first angle.
  • Surface 208; the light beam incident on the second reflective surface 208 is reflected by the second reflective surface 208 and enters the fourth sub-lens 209 in a direction perpendicular to the incident on the second reflective surface 208;
  • the light beam of the fourth sub-lens 209 is focused by the fourth sub-lens 209 and then output to the optical fiber array 303 outside the lens system.
  • the second light source is a second chip external to the lens system 200, and the light beam emitted by the second light source 302 is a light beam emitted by the second chip.
  • the second external chip of the lens system 200 is a VCSEL chip.
  • the angle between the second reflective surface 208 and the horizontal plane is 135 degrees.
  • the light beam is incident on the second reflective surface 208 at an incident angle of 45 degrees.
  • the light beam After being reflected by the second reflective surface 208, the light beam After being output from the second reflecting surface 208 at a reflection angle of 45 degrees, it is incident on the fourth sub-lens 209.
  • the light beam emitted from the third light source outside the lens system 200 is collimated by the third sub-lens 203, and then enters the first reflecting surface of the first slot 204 at a first angle. 207; the light beam incident on the first reflective surface 207 is reflected by the first reflective surface 207 and enters the fifth sub-lens 212 in a direction perpendicular to the incident on the first reflective surface 207; The light beam of the fifth sub-lens 212 is focused by the fifth sub-lens 212 and then output to the receiving chip corresponding to the fifth sub-lens 212 outside the lens system 200.
  • the third light source is the external optical fiber array 304 of the lens system 200, and the light beam emitted by the third light source is the light beam emitted by the optical fiber array 304.
  • the receiving chip corresponding to the fifth sub-lens 212 is a photoelectric detector (PD) chip.
  • PD photoelectric detector
  • the light beam emitted from the fourth light source outside the lens system 200 is collimated by the fourth sub-lens 209, and then enters the second reflective surface of the second slot 202 at a first angle. 208;
  • the light beam incident on the second reflective surface 208 is reflected by the second reflective surface 208 and enters the sixth sub-lens 213 in a direction perpendicular to the incident on the second reflective surface 208;
  • the light beam of the sixth sub-lens 213 is focused by the sixth sub-lens 213 and then output to the receiving chip corresponding to the sixth sub-lens 213 outside the lens system 200.
  • the fourth light source is the external optical fiber array 303 of the lens system 200, and the light beam emitted by the fourth light source is the light beam emitted by the optical fiber array 303.
  • the receiving chip corresponding to the fifth sub-lens 212 is a PD chip.
  • the lens system provided by the embodiment of the application can realize the single coupling of two sets of chips in the high-speed and short-distance transmission optical device solution.
  • the lens system provided by the embodiment of the application is optimized through structure.
  • the beam transmission of multiple channels and different spatial levels is realized.
  • the transmission bandwidth of the optical module is improved, and the structure of the lens system and the process of device manufacturing are simplified.
  • the lens system provided by the embodiments of the present application can reduce the number of couplings, improve production efficiency, and reduce production complexity, and can effectively avoid performance degradation and damage problems caused by the optical fiber array when connecting the lens system and the optical fiber connector.
  • FIG. 6 shows a schematic diagram of an optional structure of the first slot of the lens system provided by the present application, which will be described according to various parts.
  • the second side surface 206 and the third side surface 205 of the first card slot 204 are respectively provided with a first fixing member 218 and a second fixing member 219, the first fixing member 218 and the second fixing member 218
  • the fixing member 219 is located on the same horizontal plane.
  • first fixing member 218 and the second fixing member 219 are configured to define the position of the glass slide 218 inserted into the first slot 204.
  • the first fixing member and the second fixing member may be cylinders, for example: a cylinder with a circular cross section, a cylinder with a semicircular cross section, or a cylinder with a rectangular cross section. , A column with a square cross-section, or a column with a triangular cross-section.
  • the glass slide 218 and the second side surface 206 and the glass slide 218 and the third side surface 205 are fixed by glue.
  • the refractive index of the glue is the same as the refractive index of the lens system.
  • the material of the glass slide 218 is the same as the material of the lens system 200.
  • the light beam emitted from the light source outside the lens system 200 is collimated by the second sub-lens 211, and then enters the second reflective surface 208 of the second slot 202 at a first angle;
  • the light beam incident on the second reflective surface 208 is reflected by the second reflective surface 208 and enters the optical path of the fourth sub-lens 209 in a direction perpendicular to the incident on the second reflective surface 208.
  • the refractive index inside the first slot will be inconsistent with the refractive index of the lens system due to the air inside the first slot, and further Causes the optical power loss of the beam.
  • the light beam emitted from the light source outside the lens system 200 is collimated by the fourth sub-lens 209, passes through the first slot, and enters the second reflective surface 208 of the majority of the second slot 202 at a first angle;
  • the light beam incident on the second reflective surface 208 is reflected by the second reflective surface 208 and enters the optical path of the sixth sub-lens 213 in a direction perpendicular to the incident on the second reflective surface 208.
  • the refractive index inside the first slot will be inconsistent with the refractive index of the lens system due to the air inside the first slot, and further Causes the optical power loss of the beam.
  • a glass slide made of the same material as the refractive index of the lens system is inserted into the first card slot, so that the refractive index inside the first card slot is consistent with the refractive index of the lens system, and the light beam is reduced.
  • glue is used to fix the glass slide and the second side surface of the first slot, and between the glass slide and the third side surface of the first slot. In this way, under the joint action of the first fixing member and the second fixing member, the position of the glass slide in the first slot can be defined; Glue is applied between the side surface and the third side surface of the first card slot to fix the glass slide.
  • the refractive index of the glue is the same as the refractive index of the lens system.
  • the light beam emitted from the light source outside the lens system 200 is reflected by the second reflecting surface and enters the fourth sub In the optical path of the lens, when passing through the first card slot, a glass slide with the same refractive index as the lens system is inserted into the first card slot, and the glass slide is connected to the second side surface of the first card slot and Glue with the same refractive index as that of the lens system is smeared between the third sides of the first card slot, and the optical power loss of the light beam is compared with the optical power loss caused by the light beam passing through the first card slot where only air exists. Lower.
  • the lens system can be adjusted by adding convex lenses on the lower surface of the lens system and the first side surface, and adding a slot for the lens system. Expand to meet the beam coupling of three or more sets of input chips.
  • the coupling of three sets of input chips is taken as an example, and the expansion of the lens system will be described according to each part.
  • FIG. 7 shows a schematic diagram of an optional structure of a lens system provided by an embodiment of the present application
  • FIG. 8 shows a bottom view of a lens system provided by an embodiment of the present application corresponding to FIG. 7
  • 'I a cross-sectional view of the lens system cut through the boundary, and the description will be based on each part.
  • An embodiment of the present application provides a lens system 400.
  • the lens system 400 includes at least: a first slot 401, a second slot 402, and a third slot 403.
  • the lower surface of the lens system 400 is provided with a first sub-lens 417, a seventh sub-lens 418, and a second sub-lens 419 along the horizontal direction.
  • the first side surface of the lens system 400 is provided with a third sub-lens 411, an eighth sub-lens 413, and a fourth sub-lens 415 along a vertical direction.
  • the length of the distance from the first sub-lens 417, the seventh sub-lens 418 and the second sub-lens 419 to the first side surface in descending order is: the distance between the first sub-lens 417 and the first side surface The distance, the distance between the seventh sub-lens 418 and the first side surface, and the distance between the third sub-lens 418 and the first side surface.
  • the third sub-lens 411 includes at least one convex lens; and/or, the eighth sub-lens 413 includes at least one convex lens; and/or, the fourth sub-lens 415 includes at least one convex lens.
  • the first sub-lens 417 includes at least one convex lens; and/or, the seventh sub-lens 418 includes at least one convex lens; and/or, the second sub-lens 419 includes at least one convex lens.
  • the lower surface of the lens system 400 is provided with a fifth sub-lens 412, a ninth sub-lens 414, and a sixth sub-lens 416 along the horizontal direction.
  • the distance between the fifth sub-lens 412 and the first side surface is equal to the distance between the first sub-lens 417 and the first side surface; the ninth sub-lens 414 The distance from the first side surface is equal to the distance between the seventh sub-lens 418 and the first side surface; the distance between the sixth sub-lens 416 and the first side surface is equal to the distance between the sixth sub-lens 416 and the first side surface. The distance between the two sub-lens 419 and the first side surface.
  • the fifth sub-lens 412 includes at least one convex lens; and/or, the ninth sub-lens 414 includes at least one convex lens; and/or, the sixth sub-lens 416 includes at least one convex lens.
  • the light beam emitted from the first light source 501 outside the lens system 400 is collimated by the first sub-lens 417, and enters the first reflection of the first slot 401 at a first angle.
  • Surface 404; the light beam incident on the first reflective surface 404 is reflected by the first reflective surface 404, and enters the third sub-lens 411 in a direction perpendicular to the incident on the first reflective surface 404;
  • the light beam of the third sub-lens 411 is focused by the third sub-lens 411 and output to the optical fiber 506 outside the lens system.
  • the first light source 501 is a first chip external to the lens system 400, and the light beam emitted by the fifth light source is a light beam emitted by the first chip 501.
  • the second external chip of the lens system 200 is a VCSEL chip.
  • the first angle is 45 degrees
  • the angle between the first reflective surface 404 and the horizontal plane is 135 degrees.
  • the light beam is incident perpendicularly to the first reflective surface at 45 degrees with respect to the first reflective surface 404.
  • the surface 404 after being reflected by the first reflecting surface 404, the light beam is incident on the third sub-lens 411 at 135 degrees with respect to the first reflecting surface 404.
  • the light beam emitted from the fourth light source outside the lens system 400 is collimated by the third sub-lens 411, and then enters the first reflecting surface of the first slot 401 at a first angle. 404; the light beam incident on the first reflective surface 404 is reflected by the first reflective surface 404 and enters the fifth sub-lens 412 in a direction perpendicular to the incident on the first reflective surface 404; The light beam of the fifth sub-lens 412 is focused by the fifth sub-lens 412 and then output to the receiving chip corresponding to the fifth sub-lens 412 outside the lens system.
  • the fourth light source is the external optical fiber array 506 of the lens system 400, and the light beam emitted by the fourth light source is the light beam emitted by the optical fiber array 506.
  • the receiving chip corresponding to the fifth sub-lens 412 is a PD chip.
  • the light beam emitted from the second light source 502 outside the lens system 400 is collimated by the seventh sub-lens 418, and then enters the second reflection of the second slot 402 at a first angle.
  • Surface 405; the light beam incident on the second reflective surface 405 is reflected by the second reflective surface 405 and enters the eighth sub-lens 413 in a direction perpendicular to the incident on the second reflective surface 405;
  • the light beam of the eighth sub-lens 413 is focused by the eighth sub-lens 413 and then output to the optical fiber 505 outside the lens system.
  • the second light source 502 is a second chip external to the lens system 400, and the light beam emitted by the second light source 502 is a light beam emitted by the second chip.
  • the second external chip of the lens system 400 is a VCSEL chip.
  • the angle between the second reflective surface 405 and the horizontal plane is 135 degrees. In this way, the light beam is incident on the second reflective surface 405 perpendicularly at 45 degrees relative to the second reflective surface 405, and passes through the second reflective surface 405. After reflection, the light beam enters the eighth sub-lens 413 at 135 degrees with respect to the second reflection surface 405.
  • the light beam emitted from the fifth light source outside the lens system 400 is collimated by the eighth sub-lens 413, and then enters the second reflective surface of the second slot 402 at a first angle. 405;
  • the light beam incident on the second reflective surface 405 is reflected by the second reflective surface 405 and enters the ninth sub-lens 414 in a direction perpendicular to the incident on the second reflective surface 405;
  • the light beam of the ninth sub-lens 414 is focused by the ninth sub-lens 414 and then output to the receiving chip corresponding to the ninth sub-lens 414 outside the lens system.
  • the fifth light source is the external optical fiber array 505 of the lens system 400, and the light beam emitted by the fifth light source is the light beam emitted by the optical fiber array 505.
  • the receiving chip corresponding to the ninth sub-lens 414 is a PD chip.
  • the light beam emitted from the third light source 503 outside the lens system 400 is collimated by the second sub-lens 419, and enters the third reflection of the third slot 403 at a first angle.
  • the light beam incident on the third reflective surface 406 is reflected by the third reflective surface 406 and enters the fourth sub-lens 415 in a direction perpendicular to the incident on the third reflective surface 406;
  • the light beam of the fourth sub-lens 415 is focused by the fourth sub-lens 415 and then output to the optical fiber 504 outside the lens system 500.
  • the light beam emitted from the sixth light source outside the lens system 400 is collimated by the fourth sub-lens 415, and then enters the third reflecting surface of the third slot 403 at a first angle. 406; the light beam incident on the third reflective surface 406 is reflected by the third reflective surface 406 and enters the sixth sub-lens 416 in a direction perpendicular to the incident on the third reflective surface 406; The light beam of the sixth sub-lens 416 is focused by the sixth sub-lens 416 and then output to the receiving chip corresponding to the sixth sub-lens 416 outside the lens system.
  • the sixth light source is the external optical fiber array 504 of the lens system 400, and the light beam emitted by the sixth light source is the light beam emitted by the optical fiber array 504.
  • the receiving chip corresponding to the ninth sub-lens 414 is a PD chip.
  • the lens system provided by the embodiments of the present application in the high-speed short-distance transmission optical device solution, when more than three sets of input chips need to be coupled, a single coupling can be realized. Compared with the existing solution, the coupling times are reduced and the production is improved. Efficiency, reduce production complexity. At the same time, the lens system provided by the embodiment of the present application can effectively avoid the performance degradation and damage problems caused by the optical fiber array when connecting the lens system and the optical fiber connector.
  • fixing posts can be set on the two side surfaces of the card slot respectively, and the fixed posts can be inserted into the card slot.
  • a glass slide matching the refractive index of the lens system, and applying glue matching the refractive index of the lens system between the glass slide and the two side surfaces of the card slot. The optical power loss generated when the light beam passes through the card slot is reduced.
  • the lens system when the high-speed short-distance transmission optical module needs to be coupled with four sets of input chips, the lens system further includes: a fourth card slot.
  • the lens system is expanded by means of the fourth card slot, the lower surface of the lens system and the convex lens on the first side surface, so as to satisfy the beam coupling of the four sets of input chips.
  • the number of input chips can also be more than four; when multiple input chips are coupled, the card slot, the lower surface of the lens system and the convex lens on the first side can be expanded according to the number of input chips.

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Abstract

一种透镜系统（200，400），包括：第一卡槽（204，401）和第二卡槽（202，402）；透镜系统（200，400）的下表面沿水平方向设置有第一子透镜（210，417）和第二子透镜（211，419）；透镜系统（200，400）的第一侧面沿垂直方向设置有第三子透镜（203，411）和第四子透镜（209，415）；透镜系统（200，400）外部的光束经第一子透镜（210，417）准直后，以第一角度入射至第一卡槽（204，401）的第一反射面（207，404）；经第一反射面（207，404）的反射后，以垂直于入射第一反射面（207，404）的方向入射至第三子透镜（203，411），经第三子透镜（203，411）聚焦后输出；透镜系统（200，400）外部的光束经第二子透镜（211，419）准直后，以第一角度入射至第二卡槽（202，402）的第二反射面（208，405）；经第二反射面（208，405）的反射，以垂直于入射第二反射面（208，405）的方向入射至第四子透镜（209，415），经第四子透镜（209，415）聚焦后输出。

Description

一种透镜系统
相关申请的交叉引用
本申请基于申请号为201911088308.5、申请日为2019年11月08日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及光学技术领域，尤其涉及一种透镜系统。
背景技术
为了迎合第五代移动通信系统(5th Generation Wireless Systems，5G)对带宽的需求，高速短距传输光模块提供的带宽也随之增长。例如，将两套能够提供100Gbps带宽的输出芯片封装在一起，使高速短距传输光模块能够提供200Gbps带宽。如何将两套或多套输出芯片的光路进行耦合是需要解决的问题。
发明内容
有鉴于此，本申请实施例提供一种透镜系统，能够将两套或多套输出芯片的光路进行耦合。
本申请实施例提供一种透镜系统，所述透镜系统至少包括：第一卡槽和第二卡槽；
所述透镜系统的下表面沿水平方向设置有第一子透镜和第二子透镜；
所述透镜系统的第一侧面沿垂直方向设置有第三子透镜和第四子透镜；
从所述透镜系统外部的第一光源发出的光束经所述第一子透镜准直后，以第一角度入射至所述第一卡槽的第一反射面；入射至所述第一反射面的 光束经所述第一反射面的反射，以垂直于入射所述第一反射面的方向入射至所述第三子透镜；入射至所述第三子透镜的光束经所述第三子透镜聚焦后输出；
从所述透镜系统外部的第二光源发出的光束经所述第二子透镜准直后，以所述第一角度入射至所述第二卡槽的第二反射面；入射至所述第二反射面的光束经所述第二反射面的反射，以垂直于入射所述第二反射面的方向入射至所述第四子透镜；入射至所述第四子透镜的光束经所述第四子透镜聚焦后输出。
上述方案中，所述第一子透镜与所述第一侧面之间的距离小于所述第二子透镜与所述第一侧面之间的距离；
沿所述第一侧面的垂直方向，所述第三子透镜位于所述第四子透镜的下方。
上述方案中，所述第三子透镜包括至少一个凸透镜；和/或，所述第四子透镜包括至少一个凸透镜。
上述方案中，所述第一卡槽的第二侧面和第三侧面分别设置有第一固定件和第二固定件，所述第一固定件和所述第二固定件位于同一水平面上。
上述方案中，所述第一固定件和所述第二固定件，配置为限定插入至所述第一卡槽中的玻片的位置；
所述玻片，配置为使第一卡槽内部的折射率与所述透镜系统的折射率一致。
上述方案中，所述玻片与所述第二侧面之间，以及所述玻片与所述第三侧面之间利用胶水固定；
所述胶水的折射率与所述透镜系统的折射率相同。
上述方案中，所述玻片的材质与所述透镜系统的材质相同。
上述方案中，所述透镜系统的下表面沿水平方向设置有第五子透镜和第六子透镜；
从所述透镜系统外部的第三光源发出的光束经所述第五子透镜准直后，以所述第一角度入射至所述第一反射面；入射至所述第一反射面的光束经所述第一反射面的反射，以垂直于入射所述第一反射面的方向入射至所述第三子透镜；入射至所述第三子透镜的光束经所述第三子透镜聚焦后输出；
从所述透镜系统外部的第四光源发出的光束经所述第六子透镜准直后，以所述第一角度入射至所述第二反射面；入射至所述第二反射面的光束经所述第二反射面的反射，以垂直于入射所述第二反射面的方向入射至所述第四子透镜；入射至所述第四子透镜的光束经所述第四子透镜聚焦后输出。
上述方案中，所述第五子透镜与所述第一侧面之间的距离，等于所述第一子透镜与所述第一侧面之间的距离；
所述第六子透镜与所述第一侧面之间的距离，等于所述第二子透镜与所述第一侧面之间的距离。
上述方案中，所述透镜系统还包括：第三卡槽；
所述透镜系统的下表面沿水平方向设置有第七子透镜和第九子透镜；
所述透镜系统的第一侧面沿垂直方向设置有第八子透镜；
所述第七子透镜在水平方向上位于第一子透镜和第二子透镜之间；所述第九子透镜在水平方向上位于所述第五子透镜和第六子透镜之间；
所述第八子透镜在垂直方向上位于所述第三子透镜和第四子透镜之间；
所述第三卡槽位于第一卡槽和第二卡槽之间；
所述透镜系统外部的第五光源发出的光束经所述第七子透镜准直后，以所述第一角度入射至所述第三卡槽的第三反射面；入射至所述第三反射面的光束经所述第三反射面的反射，以垂直于入射所述第三反射面的方向入射至所述第八子透镜；入射至所述第八子透镜的光束经所述第八子透镜聚焦后输出；
所述透镜系统外部的第六光源发出的光束经所述第八子透镜准直后，以所述第一角度入射至所述第三反射面；入射至所述第三反射面的光束经 所述第三反射面的反射，以垂直于入射所述第三反射面的方向入射至所述第九子透镜；入射至所述第九子透镜的光束经所述第九子透镜聚焦后输出。
本申请提供一种透镜系统，所述透镜系统包括：第一卡槽和第二卡槽；所述透镜系统的下表面沿水平方向设置有第一子透镜和第二子透镜；所述透镜系统的第一侧面沿垂直方向设置有第三子透镜和第四子透镜；从所述透镜系统外部的第一光源发出的光束经所述第一子透镜准直后，以第一角度入射至所述第一卡槽的第一反射面；入射至所述第一反射面的光束经所述第一反射面的反射，以垂直于入射所述第一反射面的方向入射至所述第三子透镜；入射至所述第三子透镜的光束经所述第三子透镜聚焦后输出；从所述透镜系统外部的第二光源发出的光束经所述第二子透镜准直后，以第一角度入射至所述第二卡槽的第二反射面；入射至所述第二反射面的光束经所述第二反射面的反射，以垂直于入射所述第二反射面的方向入射至所述第四子透镜；入射至所述第四子透镜的光束经所述第四子透镜聚焦后输出。本申请实施例将现有技术中高速短距传输光模块的透镜的多次耦合缩短为单次耦合，提高了生产效率，同时降低生产复杂度。同时，使用本申请提供的透镜系统进行高速短距传输光模块进行光路耦合，还能有效避免连接所述透镜系统和光纤连接器的光纤阵列在连接时带来的性能劣化、损伤。本申请实施例还提供一种透镜系统，通过在所述透镜系统的第一卡槽内增加第一固定件和第二固定件，使第一卡槽内可以装配玻片，在玻片与第一卡槽之间涂抹折射率与透镜系统一致的胶水，减少经过第一卡槽的光束的光功率损失，以及杂光、散光串扰，进一步减少在高速短距传输光模块的透镜系统进行光路耦合时光束的光功率损失。本申请实施例还提供一种透镜系统，所述透镜系统至少包括：第一卡槽、第二卡槽和第三卡槽，能够在高速短距离传输光器件方案中，需要耦合三套以上输入芯片时，实现单次耦合，相比于现有方案，降低耦合次数，提高生产效率，降低生产复杂度。同时，本申请实施例提供的透镜系统可以有效避免光纤阵列在连 接所述透镜系统和光纤连接器时带来的性能劣化、损伤问题。
附图说明
图1为现有技术中实现两套芯片通过两个透镜实现耦合的结构示意图；
图2为本申请实施例提供的透镜系统的可选结构示意图一；
图3为本申请实施例提供的透镜系统的可选结构示意图一的仰视图；
图4为本申请实施例提供的透镜系统的可选结构示意图一的剖视图；
图5为本申请实施例提供的透镜系统的应用示意图；
图6为本申请实施例提供的透镜系统第一卡槽的可选结构示意图；
图7为本申请实施例提供的透镜系统的可选结构示意图二；
图8为本申请实施例提供的透镜系统的可选结构示意图二的仰视图；
图9为本申请实施例提供的透镜系统的可选结构示意图二的剖视图。
具体实施方式
随着5G网络的应用，通信市场再一次成为人们关注的中心。对数据信息需求的极速增长，促使着数据中心的带宽快速发展。带宽从过去的每秒1000兆位(1 Giga Bits Per Second，1Gbps)、10Gbps到广泛铺设使用的40Gbps和100Gbps；如今，为了迎合5G的需求，高速短距传输光模块的带宽可以达到200Gbps或400Gbps，围绕数据中心的高速短距传输光模块相关技术也成为行业热点。
能够提供200Gbps或400Gbps带宽的高速短距传输光模块，整体上可认为是四通道小型可插拔(Quad Small Form-factor Pluggable，QSFP)封装的一次升级，相应的，所述高速短距传输光模块内部的芯片数量也成倍的增加。例如，通过将两套100G的输入芯片一起封装，可以使高速短距传输光模块实现200Gbps带宽。因此，在输入芯片的光路耦合时，需要使用两个独立的透镜进行两次耦合。图1示出了使用两个独立透镜进行两次耦合 的示意图：
第一芯片通过透镜101耦合光路后，通过光纤阵列103传输至光纤连接器105；第二芯片通过透镜102耦合光路后，通过光纤阵列104传输至光纤连接器105；光纤阵列103、光纤阵列104与光纤连接器105组成二合一光纤连接器，通过所述二合一光纤连接器，可以将通过光纤阵列103和光纤阵列105的两束光路整合并阵列输出。
上述方案可以沿用QSFP光模块封装的工艺及透镜，不同的是，将QSFP光模块封装过程中，一次光路耦合增加为两次光路耦合。但两次光路耦合增加了时间成本。所述二合一光纤连接器需要同时兼顾透镜101和透镜102的连接，且如图1所述，透镜101与光纤连接器105之间的距离与透镜102与光纤连接器105之间的距离相比更长，光纤阵列103的长度需要精确；若所述光纤阵列103的长度过短，则增大了光纤连接器105的应力，容易损伤光纤或造成光路位移；若所述光纤阵列103的长度过长，所述光纤阵列103会拱起，在后续封装时，会压到所述光纤阵列，造成损伤。
针对上述现有多套芯片封装时，光路耦合的缺点，本申请提出一种透镜系统，能够解决现有技术方案中无法解决的技术难题和缺点。
下面结合附图对本发明实施例作进一步的详细描述。
图2示出了本申请实施例提供的一种透镜系统的可选结构示意图；图3示出了对应于图2的本申请实施例提供的一种透镜系统的仰视图；图4为以AA’为分界切开所述透镜系统的剖视图，将根据各个部分进行说明。
本申请实施例提供一种透镜系统200，所述透镜系统200至少包括：第一卡槽204和第二卡槽202。
在一些实施例中，所述透镜系统200的下表面沿水平方向设置有第一子透镜210和第二子透镜211。所述透镜系统200的第一侧面201沿垂直方向设置有第三子透镜203和第四子透镜209。所述第一子透镜210与所述第一侧面201之间的距离小于所述第二子透镜211与所述第一侧面201之间 的距离；沿所述第一侧面201的垂直方向，所述第三子透镜203位于所述第四子透镜209的下方。
如此，能够保证经第一子透镜210入射，第三子透镜203射出的光束，与经所述第二子透镜211入射，第四子透镜209射出的光束之间没有重叠。
在一些实施例中，所述第一卡槽204的第一反射面207与第二卡槽202的第二反射面208平行，与水平面夹角为45度，如此，可以保证从第一子透镜210入射的光束，以45度入射角入射至所述第一反射面207，经第一反射面207反射，以45度反射角从第三子透镜203射出；还可以保证从第二子透镜211入射的光束，以45度入射角入射至所述第二反射面208，经过第二反射面208反射，以45度反射角从第四子透镜209射出。
在一些实施例中，所述透镜系统200的下表面沿水平方向设置有第五子透镜212和第六子透镜213。
在一些实施例中，所述第五子透镜212与所述第一侧面201之间的距离，等于所述第一子透镜210与所述第一侧面201之间的距离；所述第六子透镜213与所述第一侧面201之间的距离，等于所述第二子透镜211与所述第一侧面201之间的距离。
在一些实施例中，所述第一子透镜210包括至少一个凸透镜；和/或，所述第二子透镜211包括至少一个凸透镜。
在一些实施例中，所述第三子透镜203包括至少一个凸透镜；和/或，所述第四子透镜209包括至少一个凸透镜。
以图3为例，所述第三子透镜203中包括第一凸透镜2031和第二凸透镜2032，从所述透镜系统200外部的第一光源301发出的其中一束光束经所述第一子透镜210准直后，经第一反射面207反射，入射至所述第一凸透镜2031中；从所述透镜系统200外部的第三光源发出的其中一束光束经所述第二凸透镜2032准直后，经第一反射面207反射，入射至所述第五子透镜212中。
所述第一凸透镜2031和所述第二凸透镜2032分别对所述接收光束聚焦，将聚焦后的光束发送至所述透镜系统外部的光线阵列304中。
在一些实施例中，所述透镜系统的下表面设置有第一凹槽216，所述第一凹槽216内设置有第二凹槽217，所述第一子透镜、第二子透镜、第五子透镜和第六子透镜设置在第二凹槽217内。
在一些实施例中，所述透镜系统的第一侧面201设置有第三凹槽214，所述第三凹槽214内设置有第四凹槽215，所述第三子透镜203和所述第四子透镜209设置在所述第四凹槽215内。
结合上述图2、3、4，以及本申请实施例提供的透镜系统应用示意图，对本申请实施例所述透镜系统的工作原理进行阐述。
在一些实施例中，从所述透镜系统200外部的第一光源301发出的光束经所述第一子透镜210准直后，以第一角度入射至所述第一卡槽204的第一反射面207；入射至所述第一反射面207的光束经所述第一反射面207的反射，以垂直于入射所述第一反射面207的方向入射至所述第三子透镜203；入射至所述第三子透镜203的光束经所述第三子透镜203聚焦后输出至所述透镜系统外部的光纤阵列304。
在一些实施例中，所述第一光源为所述透镜系统200外部第一芯片，所述第一光源301发出的光束为所述第一芯片301发出的光束。
在一些实施例中，所述透镜系统200外部第一芯片为垂直腔面发射激光器(Vertical-Cavity Surface-Emitting Laser，VCSEL)芯片。
在一些实施例中，所述第一角度为45度，所述第一反射面207与水平面的夹角为135度，如此，光束以45度入射角入射至第一反射面207，经第一反射面207反射后，所述光束以45度反射角从第一反射面207输出后，入射至所述第三子透镜203。
在一些实施例中，从所述透镜系统200外部的第二光源302发出的光束经所述第二子透镜211准直后，以第一角度入射至所述第二卡槽202的 第二反射面208；入射至所述第二反射面208的光束经所述第二反射面208的反射，以垂直于入射所述第二反射面208的方向入射至所述第四子透镜209；入射至所述第四子透镜209的光束经所述第四子透镜209聚焦后输出至所述透镜系统外部的光纤阵列303。
在一些实施例中，所述第二光源为所述透镜系统200外部第二芯片，所述第二光源302发出的光束为所述第二芯片发出的光束。
在一些实施例中，所述透镜系统200外部第二芯片为VCSEL芯片。
在一些实施例中，所述第二反射面208与水平面的夹角为135度，如此，光束以45度入射角入射至第二反射面208，经第二反射面208反射后，所述光束以45度反射角从第二反射面208输出后，入射至所述第四子透镜209。
在一些实施例中，从所述透镜系统200外部的第三光源发出的光束经所述第三子透镜203准直后，以第一角度入射至所述第一卡槽204的第一反射面207；入射至所述第一反射面207的光束经所述第一反射面207的反射，以垂直于入射所述第一反射面207的方向入射至所述第五子透镜212；入射至所述第五子透镜212的光束经所述第五子透镜212聚焦后输出至透镜系统200外部的对应于第五子透镜212的接收芯片。
在一些实施例中，所述第三光源为所述透镜系统200外部光纤阵列304，所述第三光源发出的光束为所述光纤阵列304发出的光束。
在一些实施例中，对应于第五子透镜212的接收芯片为光电探测器(Photoelectric Detector，PD)芯片。
在一些实施例中，从所述透镜系统200外部的第四光源发出的光束经所述第四子透镜209准直后，以第一角度入射至所述第二卡槽202的第二反射面208；入射至所述第二反射面208的光束经所述第二反射面208的反射，以垂直于入射所述第二反射面208的方向入射至所述第六子透镜213；入射至所述第六子透镜213的光束，经所述第六子透镜213聚焦后输出至 所述透镜系统200外部的对应于第六子透镜213的接收芯片。
在一些实施例中，所述第四光源为所述透镜系统200外部光纤阵列303，所述第四光源发出的光束为所述光纤阵列303发出的光束。
在一些实施例中，对应于第五子透镜212的接收芯片为PD芯片。
如此，通过本申请实施例提供的透镜系统，能够在高速短距离传输光器件方案中实现两套芯片的单次耦合，相比于现有方案，本申请实施例提供的透镜系统通过结构优化，实现了多个通道不同空间层次的光束传输，通过光路的整合及空间的复用，提升了光模块的传输带宽，简化了透镜系统的结构及器件制作的流程。同时，本申请实施例提供的透镜系统，能够降低耦合次数、提高生产效率、降低生产复杂度，可以有效避免光纤阵列在连接所述透镜系统和光纤连接器时带来的性能劣化、损伤问题。
图6示出了本申请提供的透镜系统的第一卡槽的可选结构示意图，将根据各个部分进行说明。
在一些实施例中，所述第一卡槽204的第二侧面206和第三侧面205分别设置有第一固定件218和第二固定件219，所述第一固定件218和所述第二固定件219位于同一水平面上。
在一些实施例中，所述第一固定件218和所述第二固定件219，配置为限定插入至所述第一卡槽204的玻片218的位置。
在一些实施例中，所述第一固定件和第二固定件可以为柱体，例如：横截面为圆形的柱体、横截面为半圆形的柱体、横截面为长方形的柱体、横截面为正方形的柱体、或横截面为三角形的柱体。
在一些实施例中，所述玻片218与所述第二侧面206之间，以及所述玻片218与所述第三侧面205之间利用胶水固定。
在一些实施例中，所述胶水的折射率与所述透镜系统的折射率相同。
在一些实施例中，所述玻片218的材质与所述透镜系统200的材质相同。
在一些实施例中，从所述透镜系统200外部的光源发出的光束经所述第二子透镜211准直后，以第一角度入射至所述第二卡槽202的第二反射面208；入射至所述第二反射面208的光束经所述第二反射面208的反射，以垂直于入射所述第二反射面208的方向入射至所述第四子透镜209的光路中，在没有玻片218的情况下，所述光束经过第一卡槽时，会因所述第一卡槽的内部空气导致所述第一卡槽内部的折射率与所述透镜系统的折射率不一致，进一步造成所述光束的光功率损耗。或者，从所述透镜系统200外部的光源发出的光束经所述第四子透镜209准之后，经过第一卡槽，以第一角度入射至多数第二卡槽202的第二反射面208；入射至所述第二反射面208的光束经所述第二反射面208的反射，以垂直于入射所述第二反射面208的方向入射至所述第六子透镜213的光路中，在没有玻片218的情况下，所述光束经过第一卡槽时，会因所述第一卡槽的内部空气导致所述第一卡槽内部的折射率与所述透镜系统的折射率不一致，进一步造成所述光束的光功率损耗。
因此，在所述第一卡槽内插入与所述透镜系统折射率相同材质的玻片，使所述第一卡槽内部的折射率与所述透镜系统的折射率一致，降低所述光束的光功率损耗。进一步，在所述玻片与所述第一卡槽的第二侧面，以及所述玻片与所述第一卡槽的第三侧面之间利用胶水固定。如此，在第一固定件和第二固定件的共同作用下，可以限定所述玻片在所述第一卡槽内的位置；通过在所述玻片与所述第一卡槽的第二侧面，以及所述第一卡槽的第三侧面之间涂抹胶水，固定所述玻片。
在一些实施例中，所述胶水的折射率与所述透镜系统的折射率相同，如此，从透镜系统200外部的光源发出的光束，在经过第二反射面反射，入射至所述第四子透镜的光路中，经过所述第一卡槽时，由于第一卡槽内插入有与所述透镜系统的折射率相同的玻片，且所述玻片与第一卡槽的第二侧面以及所述第一卡槽的第三侧面之间涂抹有与所述透镜系统的折射率 相同的胶水，所述光束的光功率损耗相比光束通过仅存在空气的第一卡槽导致的光功率损耗更低。
综上所述，通过所述玻片与第一卡槽的第二侧面以及所述第一卡槽的第三侧面之间涂抹与所述透镜系统的折射率相同的胶水，一方面能够起到固定所述玻片在所述第一卡槽内位置的作用；另一方面，能够降低第一卡槽内部所述透镜系统与玻片之间的折射率差异，减少激光光功率损耗。
在一些实施例中，所述高速短距传输光模块需要耦合三套以上输入芯片时，可以通过增加透镜系统下表面和第一侧面凸透镜和增加所述透镜系统卡槽的方式对所述透镜系统进行扩展，以满足三套及三套以上输入芯片的光束耦合。本申请实施例中，以耦合三套输入芯片为例，对所述透镜系统扩展，将根据各个部分进行说明。
图7示出了本申请实施例提供的一种透镜系统的可选结构示意图；图8示出了对应于图7的本申请实施例提供的一种透镜系统的仰视图；图9为以AA’为分界切开所述透镜系统的剖视图，将根据各个部分进行说明。
本申请实施例提供一种透镜系统400，所述透镜系统400至少包括：第一卡槽401、第二卡槽402和第三卡槽403。
在一些实施例中，所述透镜系统400的下表面沿水平方向设置有第一子透镜417、第七子透镜418和第二子透镜419。所述透镜系统400的第一侧面沿垂直方向设置有第三子透镜411、第八子透镜413和第四子透镜415。所述第一子透镜417、第七子透镜418和第二子透镜419到所述第一侧面的距离的长度由小到大依次为：第一子透镜417与所述第一侧面之间的距离、第七子透镜418与所述第一侧面之间的距离、第三子透镜418与所述第一侧面之间的距离。沿所述第一侧面的垂直方向，由上至下依次为：第四子透镜415、第八子透镜413、第三子透镜411。
在一些实施例中，所述第三子透镜411包括至少一个凸透镜；和/或，所述第八子透镜413包括至少一个凸透镜；和/或，所述第四子透镜415包 括至少一个凸透镜。
在一些实施例中，所述第一子透镜417包括至少一个凸透镜；和/或，所述第七子透镜418包括至少一个凸透镜；和/或，所述第二子透镜419包括至少一个凸透镜。
在一些实施例中，所述透镜系统400的下表面沿水平方向设置有第五子透镜412、第九子透镜414和第六子透镜416。
在一些实施例中，所述第五子透镜412与所述第一侧面之间的距离，等于所述第一子透镜417与所述第一侧面之间的距离；所述第九子透镜414与所述第一侧面之间的距离，等于所述第七子透镜418与所述第一侧面之间的距离；所述第六子透镜416与所述第一侧面之间的距离，等于第二子透镜419与所述第一侧面之间的距离。
在一些实施例中，所述第五子透镜412包括至少一个凸透镜；和/或，所述第九子透镜414包括至少一个凸透镜；和/或，所述第六子透镜416包括至少一个凸透镜。
结合图7、8、9，对本申请实施例所述透镜系统的工作原理进行阐述。
在一些实施例中，从所述透镜系统400外部的第一光源501发出的光束经所述第一子透镜417准直后，以第一角度入射至所述第一卡槽401的第一反射面404；入射至所述第一反射面404的光束经所述第一反射面404的反射，以垂直于入射所述第一反射面404的方向入射至所述第三子透镜411；入射至所述第三子透镜411的光束经所述第三子透镜411聚焦后输出至所述透镜系统外部的光纤506。
在一些实施例中，所述第一光源501为所述透镜系统400外部第一芯片，所述第五光源发出的光束为所述第一芯片501发出的光束。
在一些实施例中，所述透镜系统200外部第二芯片为VCSEL芯片。
在一些实施例中，所述第一角度为45度，所述第一反射面404与水平面的夹角为135度，如此，光束以相对于第一反射面404 45度垂直入射至 第一反射面404，经第一反射面404反射后，所述光束以相对于所述第一反射面404 135度入射至所述第三子透镜411。
在一些实施例中，从所述透镜系统400外部的第四光源发出的光束经所述第三子透镜411准直后，以第一角度入射至所述第一卡槽401的第一反射面404；入射至所述第一反射面404的光束经所述第一反射面404的反射，以垂直于入射所述第一反射面404的方向入射至所述第五子透镜412；入射至所述第五子透镜412的光束经所述第五子透镜412聚焦后输出至所述透镜系统外部的对应于所述第五子透镜412的接收芯片。
在一些实施例中，所述第四光源为所述透镜系统400外部光纤阵列506，所述第四光源发出的光束为所述光纤阵列506发出的光束。
在一些实施例中，对应于第五子透镜412的接收芯片为PD芯片。
在一些实施例中，从所述透镜系统400外部的第二光源502发出的光束经所述第七子透镜418准直后，以第一角度入射至所述第二卡槽402的第二反射面405；入射至所述第二反射面405的光束经所述第二反射面405的反射，以垂直于入射所述第二反射面405的方向入射至所述第八子透镜413；入射至所述第八子透镜413的光束经所述第八子透镜413聚焦后输出至所述透镜系统外部的光纤505。
在一些实施例中，所述第二光源502为所述透镜系统400外部第二芯片，所述第二光源502发出的光束为所述第二芯片发出的光束。
在一些实施例中，所述透镜系统400外部第二芯片为VCSEL芯片。
在一些实施例中，所述第二反射面405与水平面的夹角为135度，如此，光束以相对于第二反射面405 45度垂直入射至第二反射面405，经第二反射面405反射后，所述光束以相对于所述第二反射面405 135度入射至所述第八子透镜413。
在一些实施例中，从所述透镜系统400外部的第五光源发出的光束经所述第八子透镜413准直后，以第一角度入射至所述第二卡槽402的第二 反射面405；入射至所述第二反射面405的光束经所述第二反射面405的反射，以垂直于入射所述第二反射面405的方向入射至所述第九子透镜414；入射至所述第九子透镜414的光束经所述第九子透镜414聚焦后输出至所述透镜系统外部的对应于所述第九子透镜414的接收芯片。
在一些实施例中，所述第五光源为所述透镜系统400外部光纤阵列505，所述第五光源发出的光束为所述光纤阵列505发出的光束。
在一些实施例中，对应于第九子透镜414的接收芯片为PD芯片。
在一些实施例中，从所述透镜系统400外部的第三光源503发出的光束经所述第二子透镜419准直后，以第一角度入射至所述第三卡槽403的第三反射面406；入射至所述第三反射面406的光束经所述第三反射面406的反射，以垂直于入射所述第三反射面406的方向入射至所述第四子透镜415；入射至所述第四子透镜415的光束经所述第四子透镜415聚焦后输出至透镜系统500外部的光纤504。
在一些实施例中，从所述透镜系统400外部的第六光源发出的光束经所述第四子透镜415准直后，以第一角度入射至所述第三卡槽403的第三反射面406；入射至所述第三反射面406的光束经所述第三反射面406的反射，以垂直于入射所述第三反射面406的方向入射至所述第六子透镜416；入射至所述第六子透镜416的光束经所述第六子透镜416聚焦后输出至所述透镜系统外部的对应于所述第六子透镜416的接收芯片。
在一些实施例中，所述第六光源为所述透镜系统400外部光纤阵列504，所述第六光源发出的光束为所述光纤阵列504发出的光束。
在一些实施例中，对应于第九子透镜414的接收芯片为PD芯片。
如此，通过本申请实施例提供的透镜系统，能够在高速短距离传输光器件方案中，需要耦合三套以上输入芯片时，实现单次耦合，相比于现有方案，降低耦合次数，提高生产效率，降低生产复杂度。同时，本申请实施例提供的透镜系统可以有效避免光纤阵列在连接所述透镜系统和光纤连 接器时带来的性能劣化、损伤问题。
在一些实施例中，为避免光束经过卡槽时，由于卡槽内的空气导致的光束的光功率损耗，可以采取在卡槽的两个侧表面分别设置固定柱，在卡槽内插入与所述透镜系统的折射率匹配的玻片，并在所述玻片与卡槽的两个侧表面之间涂抹与所述透镜系统的折射率匹配的胶水。降低所述光束经过所述卡槽时产生的光功率损耗。
在一些实施例中，所述高速短距离传输光模块需要耦合四套输入芯片时，所述透镜系统还包括：第四卡槽。通过所述第四卡槽和所述透镜系统下表面和第一侧面凸透镜的方式对所述透镜系统进行扩展，以满足四套输入芯片的光束耦合。在具体实施时，所述入射芯片的套数也可以多于四套；在多套输入芯片耦合时，可以根据输入芯片的套数，相应扩展卡槽、所述透镜系统下表面和第一侧面的凸透镜的数目，以满足多套入射芯片光束耦合的需求，实现降低耦合次数，提高生产效率，降低生产复杂度的目的。
以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。

Claims (10)

  1. 一种透镜系统，所述透镜系统至少包括：第一卡槽和第二卡槽；
    所述透镜系统的下表面沿水平方向设置有第一子透镜和第二子透镜；
    所述透镜系统的第一侧面沿垂直方向设置有第三子透镜和第四子透镜；
    从所述透镜系统外部的第一光源发出的光束经所述第一子透镜准直后，以第一角度入射至所述第一卡槽的第一反射面；入射至所述第一反射面的光束经所述第一反射面的反射，以垂直于入射所述第一反射面的方向入射至所述第三子透镜；入射至所述第三子透镜的光束经所述第三子透镜聚焦后输出；
    从所述透镜系统外部的第二光源发出的光束经所述第二子透镜准直后，以所述第一角度入射至所述第二卡槽的第二反射面；入射至所述第二反射面的光束经所述第二反射面的反射，以垂直于入射所述第二反射面的方向入射至所述第四子透镜；入射至所述第四子透镜的光束经所述第四子透镜聚焦后输出。
  2. 根据权利要求1所述的透镜系统，其中，
    所述第一子透镜与所述第一侧面之间的距离小于所述第二子透镜与所述第一侧面之间的距离；
    沿所述第一侧面的垂直方向，所述第三子透镜位于所述第四子透镜的下方。
  3. 根据权利要求1所述的透镜系统，其中，所述第三子透镜包括至少一个凸透镜；
    和/或，所述第四子透镜包括至少一个凸透镜。
  4. 根据权利要求1所述的透镜系统，其中，
    所述第一卡槽的第二侧面和第三侧面分别设置有第一固定件和第二固定件，所述第一固定件和所述第二固定件位于同一水平面上。
  5. 根据权利要求4所述的透镜系统，其中，所述第一固定件和所述第二固定件，配置为限定插入至所述第一卡槽中的玻片的位置；
    所述玻片，配置为使第一卡槽内部的折射率与所述透镜系统的折射率一致。
  6. 根据权利要求5所述的透镜系统，其中，所述玻片与所述第二侧面之间，以及所述玻片与所述第三侧面之间利用胶水固定；
    所述胶水的折射率与所述透镜系统的折射率相同。
  7. 根据权利要求5所述的透镜系统，其中，所述玻片的材质与所述透镜系统的材质相同。
  8. 根据权利要求1至7任一项所述的透镜系统，其中，
    所述透镜系统的下表面沿水平方向设置有第五子透镜和第六子透镜；
    从所述透镜系统外部的第三光源发出的光束经所述第五子透镜准直后，以所述第一角度入射至所述第一反射面；入射至所述第一反射面的光束经所述第一反射面的反射，以垂直于入射所述第一反射面的方向入射至所述第三子透镜；入射至所述第三子透镜的光束经所述第三子透镜聚焦后输出；
    从所述透镜系统外部的第四光源发出的光束经所述第六子透镜准直后，以所述第一角度入射至所述第二反射面；入射至所述第二反射面的光束经所述第二反射面的反射，以垂直于入射所述第二反射面的方向入射至所述第四子透镜；入射至所述第四子透镜的光束经所述第四子透镜聚焦后输出。
  9. 根据权利要求8所述的透镜系统，其中，
    所述第五子透镜与所述第一侧面之间的距离，等于所述第一子透镜与所述第一侧面之间的距离；
    所述第六子透镜与所述第一侧面之间的距离，等于所述第二子透镜与所述第一侧面之间的距离。
  10. 根据权利要求1所述的透镜系统，其中，所述透镜系统还包括：第三卡槽；
    所述透镜系统的下表面沿水平方向设置有第七子透镜和第九子透镜；
    所述透镜系统的第一侧面沿垂直方向设置有第八子透镜；
    所述第七子透镜在水平方向上位于第一子透镜和第二子透镜之间；所述第九子透镜在水平方向上位于所述第五子透镜和第六子透镜之间；
    所述第八子透镜在垂直方向上位于所述第三子透镜和第四子透镜之间；
    所述第三卡槽位于第一卡槽和第二卡槽之间；
    所述透镜系统外部的第五光源发出的光束经所述第七子透镜准直后，以所述第一角度入射至所述第三卡槽的第三反射面；入射至所述第三反射面的光束经所述第三反射面的反射，以垂直于入射所述第三反射面的方向入射至所述第八子透镜；入射至所述第八子透镜的光束经所述第八子透镜聚焦后输出；
    所述透镜系统外部的第六光源发出的光束经所述第八子透镜准直后，以所述第一角度入射至所述第三反射面；入射至所述第三反射面的光束经所述第三反射面的反射，以垂直于入射所述第三反射面的方向入射至所述第九子透镜；入射至所述第九子透镜的光束经所述第九子透镜聚焦后输出。
PCT/CN2019/123612 2019-11-08 2019-12-06 一种透镜系统 WO2021088181A1 (zh)

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