Semiconductor laser butterfly packaging device

Abstract

A butterfly-shaped package of semiconductor laser is composed of a butterfly-shaped case, a semiconductor refrigerator, and a thermal silicon sink on which there are semiconductor laser device, optical fibre, back light detector and microwave microstrip circuit. Its advantages are high HF characteristics and temp stability, and low cost.

Description

technical field [0001] The invention belongs to the technical field of semiconductor and optical fiber communication, more specifically, it belongs to a butterfly package coupling device of a semiconductor laser and an optical fiber. Background technique [0002] In optical fiber communication technology, semiconductor lasers are usually used as signal sources for optical fiber communication. In order to guide the laser light generated by the semiconductor laser into the optical fiber, it is necessary to couple and package the semiconductor laser into a specific packaging form to achieve stable and reliable coupling of the optical signal generated by the semiconductor laser into the optical fiber, and DC bias, modulation The purpose of introducing electrical signals such as signals into semiconductor lasers. Common coupling package forms include coaxial package, butterfly package, dual in-line package, small dual in-line package and so on. Among them, the butterfly package...

AI Technical Summary

Problems solved by technology

In the common semiconductor laser butterfly packaging device, the optical fiber is usually fixed on the pedestal of the butterfly shell or in the tail pipe attached to the shell by laser welding or gluing. This coupling method has difficulties in coupling and alignment. It is necessary to precisely adjust the optical fiber to the light-emitting position of the semiconductor laser, resulting in low production efficiency, high requirements for skilled workers, and high production costs; and during the working process of the semiconductor laser butterfly packaging device, due to the heating of the semiconductor laser itself, The heat migration effect of the semiconductor refrigerator, the temperature change of the surrounding environment and other reasons will cause a certain temperature gradient between the position of the semiconductor laser and the position of the fixed optical fiber, so that the thermal expansion and contraction of the material are not consistent, which will eventually lead to the position of the semiconductor laser. The position relative to the optical fiber changes, which affects the light output stability of the device. In severe cases, there may even be no light output at all.

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