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CN-116299904-B - Optical coupling assembly and manufacturing method thereof

CN116299904BCN 116299904 BCN116299904 BCN 116299904BCN-116299904-B

Abstract

The invention relates to the technical field of optical communication, and provides an optical coupling assembly and a manufacturing method thereof. The optical coupling assembly comprises a plurality of laser chips, a plurality of first lenses, an AWG MUX chip, a second lens, an isolator and an optical fiber array assembly, wherein the laser chips emit a plurality of optical signals which are respectively coupled and converged through the corresponding first lenses and respectively enter the AWG MUX chip, the AWG MUX chip couples the plurality of optical signals into a composite wave signal, the composite wave signal is output through the AWG MUX chip, the second lens couples and converges the composite wave signal, and the composite wave signal enters one optical fiber in the optical fiber array assembly with the isolator. In the invention, the optical coupling assembly has a simpler structure, is easy to realize in an assembly process, and has obvious cost advantage.

Inventors

  • YANG SHI
  • LI PENG
  • ZHANG BO

Assignees

  • 武汉光迅科技股份有限公司
  • 湖北光谷实验室

Dates

Publication Date
20260508
Application Date
20230321

Claims (10)

  1. 1. An optical coupling assembly comprising a plurality of laser chips (1), a plurality of first lenses (2), an AWG MUX chip (3), a second lens (4), an isolator (5), and an optical fiber array assembly (6), wherein: each laser chip (1) is arranged on one side of the first lens (2), each laser chip (1) corresponds to one first lens (2), and the laser chips (1) are used for emitting optical signals; The first lens (2) is arranged on one side of the AWG MUX chip (3), the second lens (4) is arranged on the other side of the AWG MUX chip (3), the first lens (2) is used for transmitting the corresponding optical signals into the AWG MUX chip (3), and the AWG MUX chip (3) is used for coupling the multipath optical signals into a composite signal and transmitting the composite signal to the second lens (4); The isolator (5) is arranged between the second lens (4) and the optical fiber array assembly (6), the second lens (4) is used for sending the composite signal to the isolator (5), and the optical fiber array assembly (6) is used for transmitting the composite signal to the outside; The optical coupling assembly further comprises a monitoring chip (10), an optical power comparison table is stored in the monitoring chip (10), the optical power comparison table is internally stored with the whole optical power values of multiple paths of optical signals when different numbers of laser chips (1) work, the monitoring chip (10) judges whether the laser chips (1) have faults or not according to the optical power comparison table and the whole optical power values of the multiple paths of optical signals obtained in real time, and when the monitoring chip (10) detects N laser chips (1) are abnormal in working state, every N+1 laser chips (1) are divided into a group which is smaller than N+1, and each laser chip group is used for transmitting one path of optical signals so that the optical coupling assembly can be normally used.
  2. 2. The optical coupling assembly according to claim 1, further comprising a substrate (7), wherein the laser chip (1), the first lens (2), the AWG MUX chip (3), the second lens (4) and the fiber array assembly (6) are sequentially disposed on the substrate (7).
  3. 3. The optical coupling assembly according to claim 2, further comprising a plurality of spacers (8), the spacers (8) being arranged on the substrate (7), the spacers (8) being arranged below the first lens (2) and/or the second lens (4).
  4. 4. The optical coupling assembly according to claim 2, further comprising a substrate (9), the substrate (9) being arranged on the base plate (7), the laser chips (1) being arranged on the substrate (9) at predetermined intervals, the substrate (9) being adapted to dissipate heat from the laser chips (1).
  5. 5. The optical coupling assembly of claim 1, wherein the AWG MUX chip (3) includes a plurality of input waveguide ports (31), a combining region (32), and an output waveguide port (33), the plurality of input waveguide ports (31) being connected to the combining region (32), the combining region (32) being connected to the output waveguide port (33), wherein: the opposite surface of the input waveguide port (31) is provided with a corresponding first lens (2) so that the input waveguide port (31) can receive optical signals emitted by the laser chip (1); the wave combining region (32) is used for coupling multiple paths of optical signals into a wave combining signal; The opposite face of the output waveguide port (33) is provided with the second lens (4) to facilitate transmission of the combined signal into the optical fiber array assembly (6).
  6. 6. The optical coupling assembly of claim 5, further comprising a third lens (11), the AWG MUX chip (3) further comprising a plurality of back-light waveguide ports (34), wherein: each back light waveguide port (34) corresponds to each input waveguide port (31) to receive an optical signal emitted by a corresponding laser chip (1); the opposite surface of the backlight waveguide port (34) is provided with the monitoring chip (10), and the third lens (11) is arranged between the monitoring chip (10) and the backlight waveguide port (34); The monitoring chip (10) is used for receiving the optical signal output by the backlight waveguide port (34) so as to detect the working state of the laser chip (1).
  7. 7. A method of manufacturing an optical coupling assembly according to any one of claims 1 to 6, comprising: sequentially arranging a plurality of laser chips (1), an AWG MUX chip (3), an isolator (5) and an optical fiber array component (6) at corresponding positions on a substrate (7); Pre-coupling a plurality of second lenses (4) at predetermined positions, and adjusting the second lenses (4) on the optical path between the AWG MUX chip (3) and the isolator (5) until the optical fiber array component (6) can receive the combined signal; And sequentially adjusting the positions of the plurality of first lenses (2) on the light path between the laser chip (1) and the AWG MUX chip (3), and then adjusting the power of the laser chip (1) until the optical power of the combined wave signal received by the optical fiber array component (6) reaches a preset standard value.
  8. 8. The method of manufacturing an optical coupling assembly according to claim 7, wherein sequentially disposing the plurality of laser chips (1), AWG MUX chips (3), isolators (5), and optical fiber array assemblies (6) at respective positions on the substrate (7) comprises: The AWG MUX chip (3) is arranged on a base plate (7), a substrate (9) is arranged at corresponding positions of a plurality of input waveguide ports (31) of the AWG MUX chip (3), and a plurality of laser chips (1) are arranged on the substrate (9) so that light-emitting strips of the laser chips (1) are aligned with the corresponding input waveguide ports (31); A plurality of cushion blocks (8) are correspondingly arranged on the sides of a plurality of input waveguide ports (31) of the AWG MUX chip (3), a plurality of first lenses (2) are correspondingly arranged on the cushion blocks (8), the cushion blocks (8) are arranged on the sides of output waveguide ports (33) of the AWG MUX chip (3), and a second lens (4) is correspondingly arranged on the cushion blocks (8); The isolator (5) is arranged at the input end of the optical fiber array component (6), the optical fiber array component (6) is arranged on the substrate (7), and the isolator (5) is aligned to the output waveguide port (33) of the AWG MUX chip (3).
  9. 9. The method of manufacturing an optical coupling assembly according to claim 7, wherein pre-coupling the plurality of second lenses (4) at predetermined positions, adjusting the second lenses (4) on the optical path between the AWG MUX chip (3) and the isolator (5) until the optical fiber array assembly (6) can receive the combined signal comprises: powering up all the laser chips (1) simultaneously to enable all the laser chips (1) to emit multipath optical signals; Adjusting the positions of the second lens (4), the isolator (5) and the optical fiber array assembly (6) to ensure that the optical fiber array assembly (6) can receive a combined signal; and adjusting the power of all the laser chips (1) to ensure that the optical power of the optical signals emitted by all the laser chips (1) meets the pre-coupling standard value, so that after the multipath optical signals are coupled into the composite wave signals in the AWG MUX chip (3), the composite wave signals can be transmitted to the optical fiber array component (6).
  10. 10. The method for manufacturing an optical coupling assembly according to claim 7, wherein sequentially adjusting the positions of the plurality of first lenses (2) on the optical path between the laser chip (1) and the AWG MUX chip (3) and then adjusting the power of the laser chip (1) until the optical power of the composite signal received by the optical fiber array assembly (6) reaches a preset standard value comprises: powering up all the laser chips (1) simultaneously to enable all the laser chips (1) to emit multipath optical signals; The first lens (2) is arranged on a cushion block (8) between the AWG MUX chip (3) and the laser chip (1), the position of the first lens (2) is adjusted, and the light condensing effect of the first lens (2) is ensured; and adjusting the power of all the laser chips (1) based on the coupling standard value until the combined signal meets the preset standard value requirement.

Description

Optical coupling assembly and manufacturing method thereof Technical Field The present invention relates to the field of optical communications technologies, and in particular, to an optical coupling assembly and a manufacturing method thereof. Background The traditional four-channel FA (Fiber Array) optical coupling component is based on a four-channel emitting laser, four wavelength chips are adopted in many cases, the coupling mode is that light emitted by the four-channel laser chips is respectively coupled and converged through four LD Lens (lenses) and respectively enters four different input waveguide ports of an AWG MUX (Arrayed Waveguide GratingMultiplexer, array waveguide grating type dense wavelength division multiplexing) chip through a four-channel isolator Array, the AWG MUX chip synthesizes light with four wavelengths into one beam of light, the light is emitted by an output waveguide port of the AWG MUX chip and enters one optical Fiber of the FA, and the four-channel isolator Array is used, so that the optical coupling component has complex structure and high manufacturing cost. In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art. Disclosure of Invention The invention aims to provide an optical coupling assembly and a manufacturing method thereof, so as to solve the problems of complex structure and high manufacturing cost of the optical coupling assembly in the prior art. The invention adopts the following technical scheme: In a first aspect, an embodiment of the present invention provides an optical coupling assembly comprising a plurality of laser chips 1, a plurality of first lenses 2, an AWG MUX chip 3, a second lens 4, an isolator 5, and an optical fiber array assembly 6, wherein: each laser chip 1 is arranged on one side of the first lens 2, each laser chip 1 corresponds to one first lens 2, and the laser chip 1 is used for emitting optical signals; the first lens 2 is arranged on one side of the AWG MUX chip 3, the second lens 4 is arranged on the other side of the AWG MUX chip 3, the first lens 2 is used for transmitting the corresponding optical signals into the AWG MUX chip 3, the AWG MUX chip 3 is used for coupling the multipath optical signals into a composite wave signal, and transmitting the composite wave signal to the second lens 4; The isolator 5 is arranged between the second lens 4 and the optical fiber array assembly 6, the second lens 4 is used for sending the composite signal to the isolator 5, and the optical fiber array assembly 6 is used for transmitting the composite signal to the outside. Further, the optical coupling assembly further comprises a substrate 7, and the laser chip 1, the first lens 2, the AWG MUX chip 3, the second lens 4 and the optical fiber array assembly 6 are all disposed on the substrate 7. Further, the optical coupling assembly further comprises a plurality of spacers 8, the spacers 8 being arranged on the substrate 7, the spacers 8 being arranged below the first lens 2 and/or the second lens 4. Further, the optical coupling assembly further includes a substrate 9, the substrate 9 is disposed on the substrate 7, the laser chips 1 are disposed on the substrate 9 at predetermined intervals, and the substrate 9 is used for dissipating heat from the laser chips 1. Further, the AWG MUX chip 3 includes a plurality of input waveguide ports 31, a combining region 32, and an output waveguide port 33, wherein: the opposite surface of the input waveguide port 31 is provided with the corresponding first lens 2, so that the input waveguide port 31 receives multiple paths of optical signals emitted by the laser chip 1; the multiplexing section 32 is configured to couple multiple optical signals into a multiplexed signal; The opposite side of the output waveguide port 33 is provided with the second lens 4 to facilitate transmission of the combined signal into the fiber array assembly 6. Further, the optical coupling assembly further comprises a monitor chip 10 and a third lens 11, and the AWG MUX chip 3 further comprises a plurality of backlight waveguide ports 34, wherein: Each backlight waveguide port 34 corresponds to each input waveguide port 31 to receive an optical signal emitted from the corresponding laser chip 1; the monitoring chip 10 is arranged on the opposite surface of the backlight waveguide port 34, and the third lens 11 is arranged between the monitoring chip 10 and the backlight waveguide port 34; The monitoring chip 10 is configured to receive an optical signal output by the backlight waveguide port 34, so as to detect an operating state of the laser chip 1; When the monitoring chip 10 detects that the working state of one of the laser chips 1 is abnormal, each two of the laser chips 1 are used as a laser chip set, and each laser chip set is used for emitting one path of optical signal so that the optical coupling assembly can be normally used. In a second aspect, an embodiment of the present in