Dual-wavelength optical signal receiving method of 50G ONU optical device

By employing reflective, tilt, and 0-degree filters arranged at specific angles in the 50G ONU optical device, the problem of high production cost in the prior art is solved, and flexible adaptation and high isolation for wavelengths of 1342±2nm and 1366±2nm are achieved, meeting the compatibility requirements of communication links.

CN122092980APending Publication Date: 2026-05-26CHENGDU RONGBO COMM TECH CO LTD
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Patent Information

Application Number
CN202610231687.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-27
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing 50G ONU optical devices have high production costs due to the use of 0-degree dual bandpass filters, which cannot meet the requirements for flexible adaptation and communication link compatibility between the ONU and OLT ends.

Method used

A dual-wavelength optical signal receiving method is adopted, consisting of a 37-degree reflective filter, an 8-degree tilted filter, and a horizontally arranged 0-degree filter, to replace the existing combination of a 45-degree filter and a 0-degree dual bandpass filter. The method achieves effective reception and filtering of optical signals through specific angle and pass/stopband design.

Benefits of technology

It reduces production costs while achieving flexible adaptation and high isolation for both 1342±2nm and 1366±2nm wavelengths, ensuring the compatibility and flexibility of the communication link.

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Abstract

The invention discloses a dual-wavelength optical signal receiving method of a 50G ONU (Optical Network Unit) optical device, which relates to the technical field of optical communication, and comprises the following steps of: sequentially arranging a 0-degree filter, an inclined filter and a reflection filter on a receiving optical path of an optical receiving module, so that a received optical signal is sequentially processed by the reflection filter, the inclined filter and the 0-degree filter; and optical signals with wavelength ranges of 1342 + / -2nm and 1366 + / -2nm are obtained and enter an optical receiving module. According to the invention, the reflection filter arranged at 37 degrees, the inclined filter arranged at 8 degrees and the horizontally arranged 0-degree filter are matched to form a dual-wavelength optical signal receiving optical path, so that a receiving optical path formed by combining a 45-degree filter and a 0-degree dual-band-pass filter in the prior art is replaced; therefore, the problem of high production cost caused by the adoption of the zero-degree double-band-pass filter in the existing single-transmitting double-receiving 50G ONU optical device is solved.
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