Coaxial positioning method of sealing cap of coaxial packaged edge-emitting laser

Abstract

In view of the technical problem that the coaxiality of a light-emitting strip and a converging lens cannot be ensured through an indirect relative position method in the prior art, the invention provides a sealing cap coaxiality positioning method for a coaxial packaging type edge emitting laser. According to the method, based on the phenomena of eccentricity and dislocation of a light-emitting strip relative to the center of a tube socket due to differences among tube socket sizes, heat sink thicknesses and chip thicknesses of different product batches, by calculating the coordinate averagevalue of the positions of the light-emitting strips of a certain number of products and adjusting the distance between the positioning pieces of a cap sealing machine with the average value as a benchmark, the purpose that the centers of the light-emitting strip and the center of the tube cap can be directly aligned is achieved. According to the method, the precision deviation between product batches can be effectively compensated, and the coaxiality of the light-emitting strip and a lens can be effectively ensured, therefore, the precision of the coaxiality of the centers of the light-emitting strip and the tube cap is improved, the coaxiality of the light-emitting strip of the laser and the converging lens is effectively ensured, the subsequent coupling process is facilitated, and the percent of pass and the production efficiency of products are improved.

Description

technical field [0001] The invention belongs to the optical communication industry, in particular to a method for positioning the coaxiality of a sealing cap of a coaxial package type edge-emitting laser. Background technique [0002] In the optical fiber communication network, we often use edge-emitting lasers as signal light sources. Most of the edge-emitting lasers are packaged in TO-CAN (ie, coaxial transistor) packaging, which we call "coaxial packaged edge-emitting lasers." ". Its shape structure is as figure 1 As shown, for the coaxial package type edge-emitting laser, we generally require the light-emitting strip 6 (light-emitting ridge or optical waveguide) of the edge-emitting laser and the converging lens 4 (installed on the tube cap 3, the cap shell of the tube cap 3 and the lens 4 coaxial) the central axis is on the same axis (such as figure 2 shown). At present, the conventional practice in the industry is: first, use the tube base as a reference, align an...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a method for positioning the coaxiality of the sealing cap of a coaxially packaged side-emitting laser, which can directly align the light-emitting strip of the side-emitting laser with the center of the tube cap, so as to Make up for the accuracy deviation between product batches, solve the problem that the center of the light-emitting laser strip and the tube cap of the edge-emitting laser may not be on the same axis in the existing method, and improve production efficiency

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