Optical path glue-free miniaturized MUX and DEMUX optical assembly

Abstract

An optical path glue-free miniaturized MUX and DEMUX optical assembly, disclosed by the present invention, comprises an optical flat plate provided with a through groove penetrating through the two opposite side surfaces of the optical flat plate; N first WDM light filtering films which have different working wavelengths and are arranged on the through groove at one side of the optical flat plate in parallel in a spanning manner; and M optical diaphragms which are arranged on the through groove at the other side of the optical flat plate in a crossing manner and correspond to the N first WDM filter films, and are used for partially reflecting, partially transmitting or totally reflecting the optical signals reflected by the N first WDM filter films. The optical path glue-free miniaturized MUX and DEMUX optical assembly of the scheme has the characteristics of no glue in an optical path, low insertion loss, small coefficient of change of spectrum along with temperature, high reliability, miniaturization and the like, and has the advantages of capability of realizing automatic assembly, easiness in mass production, low cost and the like.

Description

technical field [0001] The invention relates to the technical fields of optical communication and 5G, in particular to a miniaturized MUX and DEMUX optical assembly without glue in the optical path. Background technique [0002] Wavelength Division Multiplexing (WDM, Wavelength Division Multiplexing) is to combine two or more optical carrier signals of different wavelengths (carrying various information) at the sending end through a multiplexer (also known as a multiplexer, Multiplexer, MUX for short) Together, and coupled to the same optical fiber of the optical line for transmission; at the receiving end, the optical carriers of various wavelengths are separated by a demultiplexer (also known as a demultiplexer, Demultiplexer, DEMUX for short), and then transmitted by The optical receiver does further processing to recover the original signal. This technology of simultaneously transmitting two or more optical signals of different wavelengths in the same optical fiber is c...

AI Technical Summary

Problems solved by technology

[0007] The existing Z-BLOCK products on the market, as mentioned above, because the optical filter is directly bonded to the front or rear of the solid glass plate with glue, the optical path needs to pass through the glue layer during transmission. The selection and reliability requirements of the optical path glue are very strict. If the glue is not selected properly or the quality of the glue layer is not well controlled during the assembly process, it may cause failure problems such as glue opening during the reliability process of the product. For devices with strict reliability requirements, there is a high risk; in addition, due to the high stress of the film layer of the WDM filter after coating, it will cause serious warping of the filter. During the bonding process of the substrates, the warping will lead to uneven thickness of the adhesive layer, and the warping and uneven thickness of the adhesive layer will cause the parallelism between the beams emitted from the Z-BLOCK to deteriorate, and the parallelism will vary with temperature. It will seriously affect the insertion loss of MUX and DEMUX devices, which greatly limits the application of existing Z-BLOCK products in some harsh conditions and high reliability requirements

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