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CN-121978805-A - Multi-core optical fiber connecting device

CN121978805ACN 121978805 ACN121978805 ACN 121978805ACN-121978805-A

Abstract

The application discloses a multi-core optical fiber connecting device which comprises a first connector, a second connector, an adapter and a fifth connector, wherein the first connector is arranged to be connected with the second optical fiber, the second end of the first connector is integrated with a first super-structure lens group, the first super-structure lens group is arranged to convert a plurality of emergent lights of the first optical fiber from two-dimensional arrangement layout to one-dimensional arrangement layout and perform beam expansion treatment, the first optical fiber is arranged in a structure of a single multi-core optical fiber, the third end of the second connector is connected with the second optical fiber, the fourth end of the second connector is provided with a plurality of optical channels, the plurality of optical channels are arranged to couple the plurality of emergent lights of the first super-structure lens group to the second optical fiber in a one-to-one correspondence manner, the second optical fiber is arranged in a structure of a plurality of single-core optical fibers, and the fifth end of the adapter is arranged to be connected with the second end in a pluggable manner, and the sixth end of the adapter is arranged to be connected with the fourth end in a pluggable manner. According to the technical scheme, the multi-core collaborative alignment difficulty of the multi-core optical fiber connecting device can be reduced, and the coupling tolerance of the multi-core optical fiber connecting device is greatly expanded, so that the plugging and butting difficulty of the multi-core optical fiber connecting device is reduced.

Inventors

  • CHENG FENG

Assignees

  • 深圳菲微欣科技有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (10)

  1. 1. A multi-core optical fiber connecting device is characterized in that the multi-core optical fiber connecting device comprises a first connector, a second connector and an adapter, wherein, The first connector comprises a first end and a second end, wherein the first end is connected with a first optical fiber, the second end is integrated with a first super-structure lens group, the first super-structure lens group is used for converting a plurality of emergent lights of the first optical fiber from two-dimensional arrangement layout to one-dimensional arrangement layout and performing beam expansion treatment, and the first optical fiber is a structural arrangement of a single multi-core optical fiber; the second connector comprises a third end and a fourth end, the third end is connected with a second optical fiber, the fourth end is provided with a plurality of optical channels, the optical channels are used for coupling a plurality of emergent lights of the first super-structure lens group to the second optical fiber in a one-to-one correspondence manner, and the second optical fiber is arranged in a structure of a plurality of single-core optical fibers; The adapter comprises a fifth end and a sixth end, wherein the fifth end is arranged to be connected with the second end in a pluggable manner, and the sixth end is arranged to be connected with the fourth end in a pluggable manner.
  2. 2. The multi-core optical fiber connecting device according to claim 1, wherein the first super-structure lens group comprises a first glass substrate, a first super-structure lens chip and a second super-structure lens chip, the first glass substrate is fixedly arranged at the second end, the first super-structure lens chip is arranged on one side surface of the first glass substrate facing the first optical fiber, the first super-structure lens chip is arranged to convert a plurality of emergent lights of the first optical fiber from a two-dimensional arrangement layout to a one-dimensional arrangement layout, the second super-structure lens chip is arranged on one side surface of the first glass substrate facing away from the first optical fiber, and the second super-structure lens chip is arranged to perform one-to-one beam expansion processing on the plurality of emergent lights converted into the one-dimensional arrangement layout.
  3. 3. The multi-core optical fiber connection apparatus of claim 2, wherein the first super-structure lens chip comprises a single first super-structure lens unit, the first optical fiber comprises a plurality of first fiber cores, the plurality of first fiber cores are arranged in two dimensions, and light emitting ends of the plurality of first fiber cores face the first super-structure lens unit; The second super-structure lens chip comprises a plurality of second super-structure lens units, the second super-structure lens units are in one-dimensional arrangement layout, and the number of the second super-structure lens units is the same as that of the first fiber cores.
  4. 4. The multi-core optical fiber connection apparatus according to claim 3, wherein the first super-structured lens unit is provided with a first nanopillar array including a plurality of first nanopillars arranged in an array, the period of the first nanopillar array being 300nm to 700nm, the height of the first nanopillars being 300nm to 790 nm, the diameter of the first nanopillars being 100 nm to 500 nm, the first nanopillar array being further arranged to perform a phase modulation of 0 to 2π by a diameter variation of each of the first nanopillars to achieve a deflection process of a corresponding light beam, and/or, The second super-structure lens unit is provided with a second nano-pillar array, the second nano-pillar array comprises a plurality of second nano-pillars arranged in an array mode, the period of the second nano-pillar array is 300nm to 700nm, the height of the second nano-pillars is 300nm to 790 nm, the diameter of the second nano-pillars is 100 nm to 500 nm, and the second nano-pillar array is further arranged to perform 0-2 pi phase modulation through the diameter change of each second nano-pillar so as to realize beam expansion treatment of corresponding light beams.
  5. 5. The multi-core optical fiber connection device according to claim 1, wherein the second optical fiber is a single multi-core optical fiber, and the fourth end is further integrated with a second super-structure lens group, and the second super-structure lens group is configured to convert the multiple beams of outgoing light of the first super-structure lens group from the one-dimensional arrangement layout to the two-dimensional arrangement layout, and perform focusing processing so as to couple the multiple beams of outgoing light into the multiple optical channels in a one-to-one correspondence manner.
  6. 6. The multi-core optical fiber connection apparatus according to claim 5, wherein the second super-structure lens group comprises a second glass substrate, a third super-structure lens chip and a fourth super-structure lens chip, wherein the second glass substrate is fixedly arranged at the fourth end, the third super-structure lens chip is arranged on one side surface of the second glass substrate facing away from the plurality of optical channels, the third super-structure lens chip is arranged to convert the plurality of outgoing lights of the first super-structure lens group from the one-dimensional arrangement layout to the two-dimensional arrangement layout, the fourth super-structure lens chip is arranged on one side surface of the second glass substrate facing towards the plurality of optical channels, and the fourth super-structure lens chip is arranged to perform one-to-one focusing treatment on the plurality of outgoing lights converted to the two-dimensional arrangement layout.
  7. 7. The multi-core optical fiber connection apparatus according to claim 6, wherein the second optical fiber comprises a plurality of second fiber cores, the plurality of optical channels are arranged in the two-dimensional arrangement, and the plurality of optical channels are light-entering ends of the plurality of second fiber cores in one-to-one correspondence; The third super-structure lens chip comprises a plurality of third super-structure lens units which are in one-dimensional arrangement layout, and the number of the third super-structure lens units is the same as that of the second fiber cores; the fourth super-structure lens chip comprises a single fourth super-structure lens unit, and the fourth super-structure lens unit is arranged opposite to the plurality of light channels.
  8. 8. The multi-core optical fiber connection apparatus of claim 7, wherein the third super-structure lens unit is provided with a third nano-pillar array including a plurality of third nano-pillars arranged in an array, the period of the third nano-pillar array being 300nm to 700nm, the height of the third nano-pillar being 300nm to 790 nm, the diameter of the third nano-pillar being 100 nm to 500 nm, the third nano-pillar array being further arranged to perform a phase modulation of 0 to 2pi by a diameter variation of each of the third nano-pillars to achieve a deflection process of a corresponding light beam, and/or, The fourth super-structure lens unit is provided with a fourth nano-pillar array, the fourth nano-pillar array comprises a plurality of fourth nano-pillars arranged in an array, the period of the fourth nano-pillar array is 300nm to 700nm, the height of the fourth nano-pillar is 300nm to 790 nm, the diameter of the fourth nano-pillar is 100 nm to 500 nm, and the fourth nano-pillar array is further arranged to perform 0 to 2 pi phase modulation through the diameter change of each fourth nano-pillar so as to realize focusing treatment of corresponding light beams.
  9. 9. The multi-core optical fiber connection apparatus according to any one of claims 5-8, wherein the second end is removably connected to the fifth end, and the first and second super-configuration lens groups are disposed at opposite intervals when the fourth end is removably connected to the sixth end.
  10. 10. The multi-core optical fiber connection apparatus of claim 9, wherein a spacing between the first and second super-lenses is less than or equal to 5mm when the first and second super-lenses are disposed in opposing spaced relation.

Description

Multi-core optical fiber connecting device Technical Field The application relates to the technical field of optical connection, in particular to a multi-core optical fiber connecting device. Background With the upgrading of the bandwidth requirement of the data center from 100G to 800G/1.6T, the transmission density of the single-core optical fiber is close to the physical limit, and the multi-core optical fiber (such as space division multiplexing multi-core optical fiber and few-mode multi-core optical fiber) becomes a core technology for improving the transmission density due to the characteristic of single-fiber multi-channel. The multi-core optical fiber connection needs to cover two types of scenes, namely 1, multi-core to single-core, wherein the multi-core optical fiber connection is used for adapting the multi-core optical fiber to a traditional single-core optical module (such as the link connection between a data center core switch and an edge single-core optical module). 2. Multi-core to multi-core: for direct interconnection between multicore fibers (e.g., the interfacing of long-haul multicore trunks with data center multicore convergence links). At present, the mainstream multi-core optical fiber connection scheme in the industry generally adopts a physical contact type connector based on a traditional ceramic contact pin (such as an MPO optical fiber connector), and the core of the technology is that one connector is connected with a multi-core optical fiber, and after the other connector is connected with the multi-core optical fiber or a single-core optical fiber, the core inserting end faces of the two connectors are tightly butted through an adapter, so that low-loss transmission of optical signals is realized. However, this technique presents the bottleneck that, to achieve low insertion loss and low return loss, on the one hand, the connectors need to be aligned individually for each core when connected to the multicore fibers, resulting in an exponential increase in the difficulty of the multicore co-alignment, and on the other hand, the adaptor requires very stringent precision in the lateral (radial) alignment of the ferrules of the two connectors, typically to the submicron level. This ultra-high precision alignment requirement results in an inability to use efficient, low cost passive alignment processes during production assembly, and the necessity of relying on high precision active alignment equipment. In the active alignment process, the optical power needs to be monitored in real time, the fiber core position is dynamically adjusted to be in an optimal state and then fixed, the assembly working hours of a single device in the process are obviously prolonged, and the production efficiency is severely restricted. Disclosure of Invention The application aims to provide a multi-core optical fiber connecting device, which aims to solve the problems that the difficulty in multi-core collaborative alignment of the existing optical connecting scheme is high, the requirement on the transverse (radial) alignment precision of the ferrules of two connectors is strict, and the device is highly dependent on active alignment equipment. To this end, embodiments of the present application provide a multi-fiber optic connection device comprising a first connector, a second connector, and an adapter, wherein, The first connector comprises a first end and a second end, wherein the first end is connected with a first optical fiber, the second end is integrated with a first super-structure lens group, the first super-structure lens group is used for converting a plurality of emergent lights of the first optical fiber from two-dimensional arrangement layout to one-dimensional arrangement layout and performing beam expansion treatment, and the first optical fiber is a structural arrangement of a single multi-core optical fiber; the second connector comprises a third end and a fourth end, the third end is connected with a second optical fiber, the fourth end is provided with a plurality of optical channels, the optical channels are used for coupling a plurality of emergent lights of the first super-structure lens group to the second optical fiber in a one-to-one correspondence manner, and the second optical fiber is arranged in a structure of a plurality of single-core optical fibers; The adapter comprises a fifth end and a sixth end, wherein the fifth end is arranged to be connected with the second end in a pluggable manner, and the sixth end is arranged to be connected with the fourth end in a pluggable manner. Optionally, in some embodiments of the present application, the first super-structure lens group includes a first glass substrate, a first super-structure lens chip and a second super-structure lens chip, where the first glass substrate is fixedly disposed at the second end, the first super-structure lens chip is disposed on a surface of a side of the first glass substrate facing the first