Thermal control system with passive thermostatic actuators for passive thermal management of pluggable optics in an optical telecom platform

Patent metadata

Field	Value
Publication number	US-11223885-B2
Application number	US-201916653104-A
Country	US
Kind code	B2
Filing date	Oct 15, 2019
Priority date	Oct 15, 2019
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A thermal control system for pluggable optics in an optical telecom platform. The thermal control system comprises a thermal interface and one or more actuators. The thermal interface is configured to dissipate heat from a pluggable optical module in the optical telecom platform. The one or more actuators configured to change a position of the pluggable optical module relative to the thermal interface such that a thermal resistance between the pluggable optical module and the thermal interface is different based on a position of the pluggable optical module relative to the thermal interface.

First claim

What is claimed is:

1. A thermal control system for pluggable optics in an optical telecom platform, the thermal control system comprising:
a thermal interface configured to dissipate heat from a pluggable optical module in the optical telecom platform; and
one or more actuators configured to change a position of the pluggable optical module relative to the thermal interface based on temperature such that a thermal resistance between the pluggable optical module and the thermal interface is different based on a position of the pluggable optical module relative to the thermal interface, wherein the optical telecom platform operates at a temperature range that requires both cooling and heating the pluggable optical module.

2. The thermal control system of claim 1 , wherein the one or more actuators is configured to cause the pluggable optical module to be pressed against the thermal interface when the temperature is above an activation temperature and to cause the pluggable optical module to move such that the pluggable optical module is separated from the thermal interface when the temperature is below the activation temperature.

3. The thermal control system of claim 1 , wherein the thermal interface comprises a thermal interface material configured to be in direct or indirect contact with an enclosure of the optical telecom platform, and comprises a contact layer to prevent adhesion between the thermal interface and the pluggable optical module.

4. The thermal control system of claim 1 , wherein the one or more actuators each comprises a thermostatic actuator configured to actuate at or about an activation temperature.

5. The thermal control system of claim 1 , wherein the one or more actuators each include a body and a control material held within the body, the body being embedded in an optic carrier that holds the pluggable optical module, and the control material being a material that expands and contracts at or about an activation temperature.

6. The thermal control system of claim 1 , further comprising
one or more contact springs configured to push the pluggable optical module towards the thermal interface; and
one or more return springs configured to push the pluggable optical module away from the thermal interface, wherein
when the temperature is above the activation temperature the one or more contact springs, the one or more return springs, and the one or more actuators are configured such that a spring force of the one or more contact springs is greater than a spring force of the one or more return springs, causing the pluggable optical module to be pressed onto the thermal interface, and
when the temperature reaches at or about an activation temperature the one or more actuators is actuated and the one or more contact springs, the one or more return springs, and the one or more actuators are configured such that the spring force of the one or more contact springs is less than the spring force of the one or more return springs, causing the pluggable optical module to be pushed away from the thermal interface until an equilibrium is reached between the spring forces of the one or more contact springs and the one or more return springs.

7. The thermal control system of claim 6 , further comprising
a gantry frame configured to attach to an enclosure of the optical telecom platform, wherein
the one or more contact springs are configured to connect the optic carrier, via the one or more actuators, to the gantry frame, and the one or more return springs are configured to connect the optic carrier to the enclosure.

8. A method for thermally controlling a pluggable optical module in an optical telecom platform, the method comprising:
providing a thermal interface configured to dissipate heat from a pluggable optical module in the optical telecom platform;
providing one or more actuators configured to change a position of the pluggable optical module relative to the thermal interface; and
actuating the one or more actuators based on temperature to change the position of the pluggable optical module such that a thermal resistance between the pluggable optical module and the thermal interface is different based on a position of the pluggable optical module relative to the thermal interface, wherein the optical telecom platform operates at a temperature range that requires both cooling and heating the pluggable optical module.

9. The method of claim 8 , wherein said actuating comprises:
pressing the pluggable optical module against the thermal interface when the temperature is above an activation temperature; and
causing the pluggable optical module to move such that the pluggable optical module is separated from the thermal interface when the temperature is below the activation temperature.

10. The method of claim 8 , further comprising providing a contact layer on the thermal interface to prevent adhesion between the thermal interface and the pluggable optical module.

11. The method of claim 8 , further comprising providing a control material held within a body of the each of the one or more actuators, the body being embedded in an optic carrier that holds the pluggable optical module, wherein the control material is a material that expands and contracts at or about the activation temperature.

12. The method of claim 8 , further comprising
providing one or more contact springs configured to push the pluggable optical module towards the thermal interface; and
providing one or more return springs configured to push the pluggable optical module away from the thermal interface, wherein
when the temperature is above the activation temperature the one or more contact springs, the one or more return springs, and the one or more actuators are configured such that a spring force of the one or more contact springs is greater than a spring force of the one or more return springs, causing the pluggable optical module to be pressed onto the thermal interface, and
when the temperature reaches at or about an activation temperature the one or more actuators is actuated and the one or more contact springs, the one or more return springs, and the one or more actuators are configured such that the spring force of the one or more contact springs is less than the spring force of the one or more return springs, causing the pluggable optical module to be pushed away from the thermal interface until an equilibrium is reached between the spring forces of the one or more contact springs and the one or more return springs.

13. The method of claim 12 , further comprising
providing a gantry frame configured to attach to the enclosure of the optical telecom platform, wherein
the one or more contact springs connect the optic carrier, via the one or more actuators, to the gantry frame, and the one or more return springs connect the optic carrier to the enclosure.

14. An optical telecom platform, comprising:
a module carrier configured to receive a pluggable optical module;
a thermal interface configured to dissipate heat from a pluggable optical module held by the module carrier;
one or more actuators configured to change a position based on temperature of the module carrier and the pluggable optical module relative to the thermal interface such that a thermal resistance between the pluggable optical module and the thermal interface is different based on a position of the pluggable optical module relative to the thermal interface; and
a housing enclosing the module carrier, wherein the housing covers the module carrier with the pluggable optical module, the thermal interface, and the one or more actuators, with respect to airflow,
wherein the op

Assignees

• Ciena Corp

Inventors

• Mays Russell P

Classifications

• G02B6/4441

  Boxes · CPC title

• G02B6/44528

  Patch-cords; Connector arrangements in the system or in the box (routing arrangements H04Q1/00) · CPC title

• H04Q2201/804

  in optical transmission systems · CPC title

• H04Q1/035 Primary

  Cooling of active equipments, e.g. air ducts · CPC title

• H05K7/2049

  Pressing means used to urge contact, e.g. springs · CPC title