Transmitter optical sub-assembly and optical transceiver assembly

Patent metadata

Field	Value
Publication number	US-11243357-B2
Application number	US-202016881602-A
Country	US
Kind code	B2
Filing date	May 22, 2020
Priority date	Nov 29, 2017
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A transmitter optical sub-assembly, includes a prism body, a first lens, and a plug-in. The prism body includes a light inlet end and a light outlet end, the first lens is disposed between the light outlet end and the plug-in, and the plug-in includes a contact end. The contact end is located on a surface that is of the plug-in and that is away from the first lens, a center of the contact end is located on a focus on an optical path of the first lens, and the contact end is arc-shaped for a purpose of a gapless interconnection with an optical fiber, to reduce end face reflection of the contact end. An optical transceiver assembly includes the transmitter optical sub-assembly, and has comparatively small reflection and a comparatively small return loss of an optical fiber end face.

First claim

What is claimed is:

1. A transmitter optical sub-assembly, comprising:
a prism body comprising an accommodation space, a light inlet end and a light outlet end;
a first lens; and
a plug-in;
wherein:
the first lens is disposed between the light outlet end and the plug-in;
the plug-in comprises a contact end on a surface thereof and that is away from the first lens, a center of the contact end is located on a focus on an optical path of the first lens, and the contact end is arc-shaped to provide a gapless interconnection with an optical fiber; and
a bottom of the accommodation space is the light outlet end of the prism body, the prism body comprises a first end and a second end that is away from the first end, an opening is formed in the accommodation space at the second end, the opening allowing the plug-in and the optical fiber to be inserted into the accommodation space, and the circumferential surface of the plug-in is in contact with a side wall of the accommodation space to fix the plug-in in place within the accommodation space.

2. The transmitter optical sub-assembly according to claim 1 , wherein the plug-in comprises a first end face, a second end face, and a circumferential surface that is connected between the first end face and the second end face, wherein the first end face faces the first lens, the second end face is away from the first lens, the second end face is arc-shaped and the contact end is formed in a central region of the second end face.

3. The transmitter optical sub-assembly according to claim 2 , wherein the prism body comprises a conductive part and an assembly part that are integrally formed, the accommodation space is disposed in the assembly part, and the assembly part comprises the first end that is connected to the conductive part and the second end that is away from the first end.

4. The transmitter optical sub-assembly according to claim 3 , wherein the first lens is integrally formed at the light outlet end of the prism body.

5. The transmitter optical sub-assembly according to claim 3 , wherein the side wall of the accommodation space comprises a limiting step, wherein the limiting step faces the opening, and the limiting step is configured to abut against the first end face of the plug-in.

6. The transmitter optical sub-assembly according to claim 3 , wherein the conductive part comprises:
a first surface;
a second surface; and
a reflective surface;
wherein the light inlet end is disposed on the first surface, the light outlet end is disposed on one side of the second surface, and the assembly part is connected to the second surface, and the reflective surface is configured to reflect light incident from the light inlet end to the light outlet end.

7. The transmitter optical sub-assembly according to claim 6 , wherein an extension direction of the first surface is perpendicular to an extension direction of the second surface.

8. The transmitter optical sub-assembly according to claim 6 , further comprising a second lens disposed on the first surface, and the second lens is integrally formed at the light inlet end of the prism body.

9. The transmitter optical sub-assembly according to claim 8 , wherein the prism body further comprises a support part, the support part is connected to the first surface of the conductive part, and the support part surrounds the second lens and is configured to support the conductive part on a substrate.

10. The transmitter optical sub-assembly according to claim 1 , wherein a dielectric optical constant of the plug-in is close to or the same as a dielectric optical constant of the optical fiber.

11. An optical transceiver assembly, comprising:
a substrate;
a laser disposed on the substrate; and
a transmitter optical sub-assembly comprising:
a prism body comprising an accommodation end, a light inlet end and a light outlet end;
a first lens; and
a plug-in;
wherein:
the first lens is disposed between the light outlet end and the plug-in;
the plug-in comprises a contact end located on a surface thereof and that is away from the first lens, a center of the contact end is located on a focus on an optical path of the first lens, and the contact end is arc-shaped to provide a gapless interconnection with an optical fiber;

a light inlet end of the prism body faces the laser to receive light emitted by the laser, and the light enters the optical fiber after passing through the light outlet end and the plug-in; and

a bottom of the accommodation space is the light outlet end of the prism body, the prism body comprises a first end and a second end that is away from the first end, an opening is formed in the accommodation space at the second end, the opening allowing the plug-in and the optical fiber to be inserted into the accommodation space, and the circumferential surface of the plug-in is in contact with a side wall of the accommodation space to fix the plug-in in place within the accommodation space.

12. The optical transceiver assembly according to claim 11 , wherein the plug-in comprises a first end face, a second end face, and a circumferential surface that is connected between the first end face and the second end face, wherein the first end face faces the first lens, the second end face is away from the first lens, the second end face is arc-shaped, and the contact end is formed in a central region of the second end face.

13. The optical transceiver assembly according to claim 12 , wherein the prism body comprises a conductive part and an assembly part that are integrally formed, the accommodation space is disposed in the assembly part, and the assembly part comprises a first end that is connected to the conductive part and a second end that is away from the first end.

14. The optical transceiver assembly according to claim 13 , wherein the first lens is integrally formed at the light outlet end of the prism body.

15. The optical transceiver assembly according to claim 13 , wherein the side wall of the accommodation space comprises a limiting step, wherein the limiting step faces the opening, and the limiting step is configured to abut against the first end face of the plug-in.

16. The optical transceiver assembly according to claim 13 , wherein the conductive part comprises:
a first surface;
a second surface; and
a reflective surface;
wherein the light inlet end is disposed on the first surface, the light outlet end is disposed on one side of the second surface, and the assembly part is connected to the second surface, and the reflective surface is configured to reflect light incident from the light inlet end to the light outlet end.

17. The optical transceiver assembly according to claim 16 , wherein an extension direction of the first surface is perpendicular to an extension direction of the second surface.

18. The optical transceiver assembly according to claim 16 , further comprising a second lens disposed on the first surface, and the second lens is integrally formed at the light inlet end of the prism body.

19. The optical transceiver assembly according to claim 18 , wherein the prism body further comprises a support part, the support part is connected to the first surface of the conductive part, and the support part surrounds the second lens and is configured to support the conductive part on the substrate.

20. The optical transceiver assembly according to claim 11 , wherein a dielectric optical constant of the plug-in is close to or the same as a dielectric optical constant of the optical fiber.

Assignees

• Huawei Tech Co Ltd

Inventors

• Hu Chihao
• Zhou Chuang
• Zeng Xiaojun
• Wen Ye

Classifications

• G02B7/18

  for prisms; for mirrors · CPC title

• G02B6/38

  having fibre to fibre mating means · CPC title

• G02B6/32 Primary

  having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)} · CPC title

• G02B6/43

  Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections · CPC title

• G02B6/4204

  the coupling comprising intermediate optical elements, e.g. lenses, holograms (encapsulated active devices H01S5/02208) · CPC title