Optical module and optical transmission equipment

Patent metadata

Field	Value
Publication number	US-11169337-B2
Application number	US-202016834817-A
Country	US
Kind code	B2
Filing date	Mar 30, 2020
Priority date	Apr 12, 2019
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

An optical module includes at least one optical sub-assembly; at least one control circuit configured to control the at least one optical sub-assembly; and a housing including a first case and a second case, wherein the optical module is configured to be plugged in and unplugged from an optical transmission equipment including a heat sink provided at a joining portion with the first case, wherein, through fitting of the first case and the second case, the housing accommodates the at least one optical sub-assembly and the at least one control circuit inside the housing, and wherein a material of the first case has a thermal conductivity higher than a material of the second case.

First claim

What is claimed is:

1. An optical module comprising:
a housing including a first case and a second case, wherein
the first case is configured to physically contact a heat sink of an optical transmission equipment,
the first case is made of a first material that has a first thermal conductivity, and
the second case is made of a second material that has a second thermal conductivity,
wherein the first thermal conductivity is higher than the second thermal conductivity;

an optical sub-assembly arranged within the housing and configured for connection to an optical fiber;
a control circuit arranged within the housing and configured to control the optical sub-assembly;
a first heat-radiation material arranged between the optical sub-assembly and the first case; and
a second heat-radiation material arranged between the control circuit and the first case.

2. The optical module of claim 1 , wherein the first material is copper.

3. The optical module of claim 1 , wherein the second material is one of a zinc alloy, an aluminum alloy, or a magnesium alloy.

4. The optical module of claim 1 , wherein
the first heat-radiation material physically contacts the optical sub-assembly and the first case; and
the second heat-radiation material physically contacts the control circuit and the first case.

5. The optical module of claim 1 , wherein a portion of an upper surface of the first case has a first surface roughness that is lower than a second surface roughness of an outer surface of the second case.

6. The optical module of claim 1 , wherein a portion of an upper surface of the first case has a first flatness that is lower than a second flatness of an outer surface of the second case.

7. The optical module of claim 1 , wherein
the optical sub-assembly is a first optical sub-assembly and the optical fiber is a first optical fiber; and
the optical module further comprises:
a second optical sub-assembly arranged within the housing and configured for connection to a second optical fiber.

8. The optical module of claim 7 , further comprising:
a third heat-radiation material arranged between the second optical sub-assembly and the first case.

9. The optical module of claim 7 , wherein
the control circuit is a first control circuit; and
the optical module further comprises:
a second control circuit arranged within the housing and configured to control the second optical sub-assembly.

10. The optical module of claim 9 , further comprising:
a fourth heat-radiation material arranged between the second control circuit and the first case.

11. An optical transmission assembly comprising:
an optical transmission equipment that includes a heat sink; and
an optical module that is configured to be plugged in and unplugged from the optical transmission equipment, the optical module comprising:
a housing including a first case and a second case, wherein
the first case is configured to physically contact the heat sink when the optical module is plugged in the optical transmission equipment,
the first case is made of a first material that has a first thermal conductivity, and
the second case is made of a second material that has a second thermal conductivity,
wherein the first thermal conductivity is higher than the second thermal conductivity;

an optical sub-assembly arranged within the housing and configured for connection to an optical fiber;
a control circuit arranged within the housing and configured to control the optical sub-assembly;
a first heat-radiation material arranged between the optical sub-assembly and the first case; and
a second heat-radiation material arranged between the control circuit and the first case.

12. The optical transmission assembly of claim 11 , wherein the first material is copper.

13. The optical transmission assembly of claim 11 , wherein the second material is one of a zinc alloy, an aluminum alloy, or a magnesium alloy.

14. The optical transmission assembly of claim 11 , wherein
the first heat-radiation material physically contacts the optical sub-assembly and the first case; and
the second heat-radiation material physically contacts the control circuit and the first case.

15. The optical transmission assembly of claim 11 , wherein a portion of an upper surface of the first case has a first surface roughness that is lower than a second surface roughness of an outer surface of the second case.

16. The optical transmission assembly of claim 11 , wherein a portion of an upper surface of the first case has a first flatness that is lower than a second flatness of an outer surface of the second case.

17. The optical transmission assembly of claim 11 , wherein
the optical sub-assembly is a first optical sub-assembly and the optical fiber is a first optical fiber; and
the optical module further comprises:
a second optical sub-assembly arranged within the housing and configured for connection to a second optical fiber.

18. The optical transmission assembly of claim 17 , wherein the optical module further comprises:
a third heat-radiation material arranged between the second optical sub-assembly and the first case.

19. The optical transmission assembly of claim 17 , wherein
the control circuit is a first control circuit; and
the optical module further comprises:
a second control circuit arranged within the housing and configured to control the second optical sub-assembly.

20. The optical transmission assembly of claim 19 , wherein the optical module further comprises:
a fourth heat-radiation material arranged between the second control circuit and the first case.

Assignees

• Lumentum Japan Inc

Inventors

• Ishii Hiroyoshi
• Aoki Tetsuya
• Takahashi Koichi

Classifications

• H05K7/2039

  characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00) · CPC title

• G02B6/4246

  Bidirectionally operating package structures · CPC title

• G02B6/4261

  Packages with mounting structures to be pluggable or detachable, e.g. having latches or rails · CPC title

• H04B10/40

  Transceivers · CPC title

• H05K7/14

  Mounting supporting structure in casing or on frame or rack · CPC title