Passive optical network equipment and method used for passive optical network equipment

Abstract

The embodiment of the invention provides passive optical network equipment and a method used for the passive optical network equipment. The passive optical network equipment can be configured to perform high rate communication through a component of narrow transmission bandwidth. The passive optical network equipment can comprise a preprocessing unit which is configured to preprocess communication signals to reduce distortion of the communication signals suffered in the communication process, wherein at least partial distortion is caused by the narrow transmission bandwidth of the component and long distance optical fiber transmission; and an electro-optic conversion unit which is configured to convert the preprocessed communication signals into optical signals to be transmitted through optical fibers. According to the passive optical network equipment and the method used for the passive optical network equipment, digital post-processing based on the high-cost ADC and DSP does not need to be performed in the optical network unit ONU of the user side.

Description

technical field [0001] Embodiments of the present disclosure relate generally to optical access networks, and more particularly to a passive optical network device and a method for a passive optical network device. Background technique [0002] As the time for the standardization of the Next Generation Ethernet Passive Optical Network (NG-EPON) approaches, the 4-wavelength×25Gb / s (12.5G baud rate) method based on the fourth-order level pulse amplitude modulation (PAM4) is the most promising one of the candidates. If existing components such as optical transceivers with 10GHz transmission bandwidth can somehow be adapted for NG-EPON's "overloaded" 12.5G baud rate PAM4 data, then this technology will be very promising and Competitiveness. [0003] People have been considering such a communication scheme in recent years, but there are still some technical difficulties in its implementation, which can be summarized in Table 1 below. [0004] Table 1 [0005] [0006] At p...

AI Technical Summary

Problems solved by technology

However, due to the nonlinear distortion caused by the limitation of transmission bandwidth, a high-cost ADC and DSP-based digital post-compensation / post-processing are required in the optical network unit ONU at the user end, which significantly increases the cost and complexity of the user end

[0008] In addition, these solutions also have some unsatisfactory performance, such as limited optical fiber transmission distance (less than 30km)

Typically, 25Gb / s PAM4 data is not suitable for transmission over 40km of single-mode fiber and cannot be received without using dispersion compensating fiber (DCF)

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