Wavelength division multiplexer/de-multiplexer and optical transmitter module

Abstract

The embodiment of the invention discloses a wavelength division multiplexer / de-multiplexer and an optical transmitter module and relates to the communication technology field. The wavelength division multiplexer / de-multiplexer is used for reducing the reflection number of light signals and improving the combination of light paths. At least four paths of light signals are multiplexed into one path of light signals by the wavelength division multiplexer / de-multiplexer, different light signals are reflected or transmitted through a light path changing element, a first filtering light combination element, a second filtering light combination element and a third filtering light combination element, so that the light signals with different wavelengths can be multiplexed into one path of light signals.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a wavelength division multiplexer / demultiplexer and an optical emission component. Background technique [0002] With the continuous development of optical fiber communication technology, people have higher and higher requirements for the transmission rate and transmission quantity of optical fiber, and wavelength division multiplexing technology has also emerged as the times require. Wavelength division multiplexing technology is a technology that combines two or more different optical carrier signals through a multiplexer at the sending end and couples them to the same optical fiber for transmission. A technology for separating optical signals of different wavelengths. Therefore, for an optical fiber communication network with a transmission rate of 40 / 100Gbps, the currently commonly used solution is to multiplex 4 optical signals of different wavelengths into a ...

AI Technical Summary

Problems solved by technology

[0005] Although the above prior art realizes combining four channels of light with different wavelengths into one channel of light, there are six light reflection points in the combiner, and the incident light λ 1 After six reflections, the incident light λ 2 After four reflections, the incident light λ 3 After two reflections, the four-way light has a total of twelve reflections, and the light has more reflections in the combiner

[0006] At the same time, due to the existence of errors, the incident angle of the high-reflection film will shift, and the angle difference between the incident light and the normal will be reflected between the reflected light and the normal, that is, how much the incident angle shifts, the reflection The angle is also offset by how much, resulting in the angular offset value of the incident light and the reflected light being twice the angle difference. Then, after multiple reflections, the cumulative offset of this angle difference will be very large, and the incident position after reflection will be A large offset occurs, which is not conducive to the merging of subsequent optical paths

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