8-channel polarization combiner

Abstract

An 8-channel polarization combiner is used for combining 8 channels of parallel incident single-channel optical signals into one channel for output and comprises a first wave combining assembly, a second wave combining assembly, a third wave combining assembly and a fourth wave combining assembly, wherein the first wave combining assembly comprises a first reflection unit and a filter unit group;the second wave combining assembly comprises a first polarization adjusting unit, a second reflecting unit and a first polarization wave combining unit; the third wave combining assembly comprises a second polarization adjusting unit, a third reflecting unit and a second polarization wave combining unit; and the fourth wave combining assembly comprises a fourth reflecting unit and a third polarization wave combining unit. By the 8-channel polarization combiner, the problem of optical path stability of four-wavelength light beam wave combination in the prior art is solved, furthermore, opticalpath length is short, an optical path is convenient to stabilize, the size is small, small-size devices and modules are formed favorably, and moreover, the 8-channel polarization combiner is suitablefor 8 channel / wavelength, and can be applied to a 200G / 400G high-speed optical transceiving module.

Description

technical field [0001] The invention relates to optical communication technology, in particular to a high-speed optical transceiver module, in particular to an 8-channel polarization multiplexer for a 200G / 400G high-speed optical transceiver module. Background technique [0002] With the explosive growth of Internet data services and the continuous emergence of applications such as cloud computing, high-performance computers, data centers, and autonomous driving, optical fiber communication has higher and higher requirements for communication bandwidth, from megabit rates to gigabit to 10G, Extend to 40G / 100G, and future 200G / 400G requirements. [0003] Due to the speed bottleneck of electrical transmission, for optical fiber communication modules that require a transmission rate of 100G / 200Gbps, in order to ensure long-distance high-speed transmission of data, a large number of wavelength division multiplexing / demultiplexing technologies are used, that is, 4 optical signals...

AI Technical Summary

Problems solved by technology

The final multiplex is two polarized lights perpendicular to each other, which are respectively aligned with the transmission axis and reflection axis of the polarization multiplexing PBC sheet (for example, the polarization in the X direction is transmitted while the polarization in the Y direction is reflected, and the transmission direction is the Z direction), so the combination After the wave, there are two polarization directions (X direction and Y direction), so that the 5th and 6th channels in the back already contain two mutually perpendicular polarization directions, and it is no longer possible to combine waves according to this idea.

This solution has the problem of not being able to continue multiplexing, and it cannot be directly extended to the multiplexing scenario of 8 wavelengths, nor can it be directly extended to the application requirements of 200G / 400G

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