Coupling method of multiplexed optical module optical receiving sub-module

Abstract

The present invention relates to a coupling method of optical receiving sub-module of multiplexing optical module, comprising the following steps: S1, fixing TIA, PD and DMUX on the shell; Power up the TIA and PD with the golden finger of the body; S3, connect an adapter with a collimator to the body and connect a light source to the adapter; S4, select one of the channels for coupling, first adjust the position of one of the first lenses, Then adjust the position of the adapter, and then adjust the position of the first lens, and adjust the position of the first lens and the adapter repeatedly until the responsivity of the PD no longer increases significantly; S5, remove the tape The adapter of the collimator, and then install the adapter on the housing; S6, then adjust and determine the positions of several other first lenses. The coupling efficiency of the present invention is less dependent on the placement accuracy of the PD, and even if the placement position of the PD deviates, the optimum point of the coupling efficiency can be found by adjusting the position of the first lens.

Description

technical field [0001] The invention relates to the field of coupling technology, in particular to a coupling method for an optical receiving sub-module of a multiplexing optical module. Background technique [0002] With the development of the optical communication industry, the data traffic that needs to be transmitted is increasing, so the requirements for the transmission rate of the optical module are also getting higher and higher. In recent years, the technology of multiplexing multiple wavelengths of light directly in the optical module and then transmitting it in the optical fiber has become more and more widely used. Typical products such as 4*10G and 4*25G have been shipped in large quantities. Single-mode products and 4*50G and 4*100G single-mode products whose shipments are currently growing rapidly. Compared with traditional coaxial products, multiplexed products are more complex in structure and optical path design, and the coupling process is more difficult....

AI Technical Summary

Problems solved by technology

This coupling method requires an external high-speed lens and prism, the equipment structure is complex, the cost is high, and the coupling is difficult

[0005] The position of the collimated light in the traditional coupling lens 2 depends on the calibration of the machine, to be precise, it depends on the fixed position of the high-speed lens. If there is a deviation in the fixed position of the high-speed lens, the coupled collimated light will also have deviations, so that Affects the coupling efficiency of light coupled into the PD by subsequent lens 1

[0006] The position of the collimated light in the traditional coupling lens 2 method also depends on the position of the shell assembly on the coupling table. If there is a deviation in the assembly of the shell on the coupling table, the final collimated light path will also have deviations, which will affect the subsequent lens. 1Coupling efficiency of light coupled into PD

[0007] After the traditional coupling method, lens 2 is coupled to lens 1. Since the position of PD has been fixed at this time, the position of PD relative to the collimated light has also been determined, so the relative position deviation between PD and collimated light directly affects the final coupling into PD. The light coupling efficiency of

[0008] Generally speaking, the traditional coupling method has very high requirements for equipment calibration, component placement accuracy and staff operation, and the process is relatively complicated and difficult to operate.

In addition, the coupling equipment is also more complicated, requiring two types of equipment for coupling collimated light (coupling lens 2) and coupling lens 1, and the cost is relatively high

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