Preparation method of pipe cap used for 5G communication high-speed laser TO packaging

Abstract

The invention discloses a preparation method of a pipe cap used for 5G communication high-speed laser TO packaging. The preparation method comprises the following steps: assembling a metal pipe shell, C-Lens and a glass-ceramic welding ring onto a fixture, putting the fixture in an atmosphere sintering furnace, and carrying out AR film coating on the inner and outer side parts of C-Lens to obtain the finished product. By designing a special laser packaging pipe cap, a laser collimator C-Lens is welded through air impermeability, the preparation method of the pipe cap serving as a special structure for laser TO56 packaging by replacing an aspherical lens is used for double-chip laser TO packaging, and the bandwidth of 40 GHz can be reached, so that the cost is greatly reduced, the purpose of miniaturization is realized, compatibility with existing optical device standard is realized, and the popularization speed of 5G network of high-speed optical devices is effectively increased. Without changing current packaging technology and equipment, the output of 40 GHz optical signals is realized through single TO packaging.

Description

technical field [0001] The invention belongs to the field of packaging components of semiconductor lasers, in particular to a method for preparing a TO packaging tube cap for 5G communication high-speed lasers. Background technique [0002] With the continuous development of optical fiber communication technology and the advent of the era of big data, the communication capacity and bandwidth continue to expand, and Gigabit networks will gradually enter thousands of households. However, due to the limitation of high-speed lasers (20GHz and above) in coaxial TO packages Due to the limitation of the lens tube cap, the spherical aberration problem of the ball lens tube cap makes the laser coupling efficiency lower than 25%, and the beam quality cannot meet the performance requirements for high-speed transmission of optical signals. All of them are currently packaged in butterfly (BTF) Add an aspherical lens, or directly use an aspheric lens tube cap TO package to achieve a coupl...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of optical fiber communication technology and the advent of the era of big data, the communication capacity and bandwidth continue to expand, and Gigabit networks will gradually enter thousands of households. However, due to the limitation of high-speed lasers (20GHz and above) in coaxial TO packaging Due to the limitation of the lens tube cap, the spherical aberration problem of the ball lens tube cap makes the laser coupling efficiency lower than 25%, and the beam quality cannot meet the performance requirements for high-speed transmission of optical signals. All of them are currently packaged in butterfly (BTF) Add an aspherical lens, or directly use an aspheric lens tube cap TO package to achieve a coupling efficiency of about 50%

[0003] However, the cost of this butterfly package is very high. Although the aspheric lens can achieve high coupling efficiency, due to the structural characteristics of this lens, it is necessary to require the laser beam to coincide with the optical axis of the lens as much as possible. Therefore, the structure of the The lens tube cap cannot adopt a double-chip packaging structure, and it is impossible to achieve a single laser TO output up to 40GHz

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