CWDM wavelength division multiplexer and manufacturing process thereof

Abstract

The invention belongs to the field of optical fiber communication and provides a CWDM wavelength division multiplexer. The CWDM wavelength division multiplexer comprises a lens, a light filter and optical cement. A groove matched with the light filter is formed in the lens, the optical cement is arranged in the groove, the light filter is attached to the lens through the optical cement, the width of the groove is smaller than that of the light filter, and the surface, adhering to the light filter, of the lens is parallel to the surface of the cohesive light filter. The light filter and the lens achieve parallel adhesion, no angle deviation exists between the light filter and the lens, insertion loss can be greatly reduced even under the multi-channel condition, through the structural improvement, the debugging step is omitted, the production progress is accelerated, and miniaturization and integration of CWDM wavelength division multiplexer modules are achieved.

Description

technical field [0001] The invention belongs to the field of optical fiber communication, and in particular relates to a CWDM wavelength division multiplexer and a manufacturing process thereof. Background technique [0002] Wavelength division multiplexing technology is to make full use of the huge bandwidth resources brought by the low loss of single-mode fiber. According to the wavelength of each channel's light wave, the low-loss area of ​​the fiber can be divided into several channels. The light wave is used as the carrier of the signal. The multiplexer of the wavelength division multiplexer combines the signal optical carriers of different wavelengths and sends them into one optical fiber for transmission. At the receiving end, the demultiplexer of the wavelength division multiplexer separates these optical carriers carrying different signals at different wavelengths for multiplexing. Since the optical carrier signals of different wavelengths can be regarded as indepe...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a CWDM wavelength division multiplexer, which aims to solve the problem that the CWDM filter mounting process in the prior art cannot guarantee the parallelism between the filter and the lens. With the increase of the number of channels, it will lead to The angle deviation of the incident light causes optical power loss, which limits the increase in the number of optical channels; and the output optical path deflection due to the angle deviation needs to be coupled and debugged with the collimator, which limits the mass production efficiency, and thus makes it impossible to further modularize the structural components of CWDM. miniaturization problem

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