An optical module that can adopt liquid immersion refrigeration and its manufacturing method

Abstract

The invention relates to the technical field of optical communication, in particular to an optical module capable of adopting liquid immersion refrigeration and a manufacturing method thereof, wherein the optical module includes a PCB board, an optoelectronic device, an optical lens and an optical connector; the optoelectronic device is installed on the PCB board , the optical lens is fixed above the optoelectronic device; one end of the optical connector is connected to the optical lens, and the other end is extended by an optical cable with a pigtail; the outside of the optical module is encapsulated by low-pressure injection molding materials, and the low-pressure injection molding materials meet: injection pressure 1.5 ~40bar, injection molding temperature lower than 110℃, adhesion with PCB board greater than 3000mpa.s, impedance performance matching with high-speed signal line of optical module. The optical module of the present invention is fully plastic-sealed with low-pressure injection molding materials, has low cost, high integration, and simple assembly, and can be used for a long time in a liquid immersion environment, effectively preventing the cooling liquid from polluting the optical path and interfering with the optical path.

Description

【Technical field】 [0001] The invention relates to the technical field of optical communication, in particular to an optical module capable of adopting liquid immersion refrigeration and a manufacturing method thereof. 【Background technique】 [0002] At present, most of the optical modules used in data center communication are metal-packaged air-cooled optical modules, that is, the cooling system is all air-cooled, and the cooling medium is air. However, as the power consumption of optical modules increases, air cooling has become more and more difficult to meet the heat dissipation requirements of modules with greater power consumption; at the same time, in order to save energy and protect the environment, companies such as Google, Facebook, and Ali are vigorously developing liquid cooling For the optical module, it is hoped to use cooling liquid instead of air cooling. [0003] The use of liquid immersion cooling technology in data centers and high-performance computing ha...

AI Technical Summary

Problems solved by technology

Conventional optical modules generally use alloy shells, optical components are non-hermetically sealed, and optical connectors are directly exposed; when this type of optical module is directly placed in a liquid-cooled environment, due to the strong penetration of the refrigerant liquid, the cooling The liquid will easily penetrate into the optical path of the optical element immediately, affecting the optical path, resulting in unpredictable optical reflection, refraction, etc.

Therefore, it is difficult for conventional optical modules to work normally in a liquid-cooled environment. How to effectively protect the optical path of the optical module is a problem that must be solved for optical modules used in liquid-cooled environments.

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