Optical module

Patent metadata

Field	Value
Publication number	US-12074642-B2
Application number	US-202217956084-A
Country	US
Kind code	B2
Filing date	Sep 29, 2022
Priority date	Jun 24, 2022
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

An optical module includes a circuit board, a light emitting device and a data processor. The data processor is disposed on the circuit board. The data processor includes a reverse gearbox and a gearbox. The reverse gearbox is connected to the light emitting device, and is configured to receive a high-speed electrical signal from the circuit board, and decode the high-speed electrical signal into a plurality of channels of low-speed electrical signals. The plurality of channels of low-speed electrical signals drive the light emitting device to emit the plurality of channels of optical signals. The gearbox is connected to the light receiving device, and is configured to receive a plurality of channels of low-speed electrical signals output by the light receiving device, encode the plurality of channels of low-speed electrical signals into a high-speed electrical signal, and transmit the high-speed electrical signal to the circuit board.

First claim

What is claimed is:

1. An optical module, comprising:
a circuit board;
a light emitting device disposed on the circuit board, and the light emitting device being configured to emit a plurality of channels of first optical signals;
a light receiving device disposed on the circuit board, and the light receiving device being configured to receive a plurality of channels of second optical signals from an outside of the optical module, and convert the plurality of channels of second optical signals into a plurality of channels of electrical signals; and
a data processor disposed on the circuit board, wherein the data processor includes:
a reverse gearbox connected to the light emitting device, and the reverse gearbox being configured to receive a first high-speed electrical signal from the circuit board, and decode the first high-speed electrical signal into a plurality of channels of first low-speed electrical signals, and the plurality of channels of first low-speed electrical signals driving the light emitting device to emit the plurality of channels of first optical signals; and
a gearbox connected to the light receiving device, and the gearbox being configured to receive a plurality of channels of second low-speed electrical signals output by the light receiving device, encode the plurality of channels of second low-speed electrical signals into a second high-speed electrical signal, and transmit the second high-speed electrical signal to the circuit board;
wherein the light emitting device includes:
a first laser array disposed on the circuit board and configured to emit the plurality of channels of first optical signals driven by the plurality of channels of first low-speed electrical signals; and
a first lens assembly covering the first laser array and configured to change a propagation direction of the first optical signals emitted by the first laser array, wherein the first lens assembly includes a first optical port groove disposed on a surface of the first lens assembly away from the circuit board, and an inclined sidewall of the first optical port groove is provided as a first reflective surface configured to reflect the first optical signals emitted by the first laser array;
the optical module further comprising:
an optical fiber adapter;
a transmitting optical fiber array, one end of the transmitting optical fiber array being connected to the first lens assembly, and another end of the transmitting optical fiber array being connected to the optical fiber adapter, and the transmitting optical fiber array being configured to transmit the first optical signals emitted by the first laser array; and
a transmitting optical fiber bracket, the end of the transmitting optical fiber array connected to the first lens assembly being inserted into the transmitting optical fiber bracket and protruding from the transmitting optical fiber bracket, and the transmitting optical fiber bracket being directly connected to the first lens assembly to achieve the connection between the transmitting optical fiber array and the first lens assembly.

2. The optical module according to claim 1 , wherein channels of electrical signals output by the reverse gearbox are twice channels of electrical signals input to the reverse gearbox, and channels of electrical signals output by the gearbox are half of channels of electrical signals input to the gearbox.

3. The optical module according to claim 1 , wherein each of the first and second high-speed electrical signals is an electrical signal of 200 Gb/s, and each of the first and second low-speed electrical signals is an electrical signal of 100 Gb/s.

4. The optical module according to claim 1 , wherein the first laser array includes a vertical cavity surface emitting laser (VCSEL) array.

5. The optical module according to claim 1 , wherein the light emitting device further includes a plurality of laser driving chips disposed on the circuit board, and the laser driving chips are configured to drive corresponding lasers in the first laser array to emit the first optical signals.

6. The optical module according to claim 1 , wherein the first lens assembly further includes:
a first groove disposed on a surface of the first lens assembly proximate to the circuit board, and the first laser array being located in a sealed cavity formed by the first groove and the circuit board; and
a first collimating lens array disposed in the first groove and corresponding to a position of the first laser array, and the first collimating lens array being configured to collimate the first optical signals emitted by the first laser array.

7. The optical module according to claim 1 , wherein the first lens assembly further includes:
a second groove disposed on a surface of the first lens assembly proximate to the optical fiber adapter and configured to be plugged with the transmitting optical fiber bracket; and
a plurality of first optical fiber sockets disposed in the second groove and configured to be plugged with the transmitting optical fiber array.

8. The optical module according to claim 7 , wherein a first optical fiber socket includes a first connection portion and a second connection portion, the first connection portion communicates with the second connection portion, and the first connection portion is closer to the second groove than the second connection portion; and
an inner diameter of the first connection portion is larger than an inner diameter of the second connection portion, and a dimension of the second groove along a direction perpendicular to the circuit board is larger than the inner diameter of the first connection portion.

9. The optical module according to claim 7 , wherein the first lens assembly further includes a plurality of first convergent lenses, and the plurality of first convergent lenses are disposed at an end of corresponding first optical fiber sockets away from the second groove, and are configured to converge the first optical signals emitted by the first laser array.

10. The optical module according to claim 1 , wherein the light receiving device includes:
a first detector array disposed on the circuit board, and the first detector array being configured to receive the plurality of channels of second optical signals from the outside of the optical module and convert the plurality of channels of second optical signals into the plurality of channels of electrical signals; and
a second lens assembly covering the first detector array, and the second lens assembly being configured to change a propagation direction of the second optical signals from the outside the optical module.

11. The optical module according to claim 10 , wherein the light receiving device further includes a plurality of trans-impedance amplifiers disposed on the circuit board, and a trans-impedance amplifier is configured to amplify an electrical signal converted by a corresponding detector in the first detector array.

12. The optical module according to claim 10 , wherein the second lens assembly includes a second optical port groove disposed on a surface of the second lens assembly away from the circuit board, and an inclined sidewall of the second optical port groove is provided as a second reflective surface configured to reflect the second optical signals from the outside of the optical module.

13. The optical module according to claim 12 , wherein the second lens assembly further includes:
a third groove disposed on a surface of the second lens assembly proximate to the circuit board, and the first detector array being located in a sealed cavity formed by the third groove and the circuit board; and
a convergent lens array di

Assignees

• Hisense Broadband Multimedia Technology Co Ltd

Inventors

• Mu Jianwei
• Wu Tao
• Yang Sigeng
• He Peng

Classifications

• H04B10/801

  using optical interconnects, e.g. light coupled isolators, circuit board interconnections · CPC title

• H04B10/67

  Optical arrangements in the receiver · CPC title

• H04B10/503

  Laser transmitters · CPC title

• G02B6/4274

  Electrical aspects (G02B6/4263 and G02B6/4265 take precedence) · CPC title

• G02B6/425

  Optical features (semiconductor laser arrays H01S5/40; hybrid LED arrays H10W90/00) · CPC title