A passive wavelength division multiplexer / demultiplexer, a front transmission model and a 5G front transmission method

By employing a combination of a first-stage filter and a second-stage filter bank in a passive wavelength division multiplexer/demultiplexer, and utilizing the connection between dispersion-compensated optical fiber and ordinary optical fiber, efficient transmission of 12 25G optical signals was achieved. This solved the problem of excessive optical fiber requirements for multi-frequency 5G fronthaul, reduced costs, and simplified maintenance.

CN115882997BActive Publication Date: 2026-06-12CHINA MOBILE GROUP DESIGN INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA MOBILE GROUP DESIGN INST
Filing Date
2021-09-28
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing passive wavelength division multiplexing/demultiplexing devices cannot effectively support the fronthaul requirements of multiple 5G frequency points, resulting in the need for multiple sets of equipment and multiple optical cables, which increases costs and maintenance complexity.

⚗Method used

A combination structure of a primary filter and a secondary filter bank is adopted. The primary filter is connected to the first group of secondary filters through dispersion-compensated optical fiber, and the primary filter is connected to the second group of secondary filters through ordinary optical fiber, so as to realize the transmission of 12 channels of 25G optical signals and reduce the optical fiber requirement.

🎯Benefits of technology

It enables high-speed, high-capacity communication, reduces the demand for optical fibers, lowers costs, and facilitates maintenance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to a kind of passive wave division multiplexer / demultiplexer, front model and 5G front method, passive wave division multiplexer / demultiplexer includes primary filter and secondary filter group, the secondary filter group includes first group of secondary filter and second group of secondary filter, the primary filter is connected with the first group of secondary filter by dispersion compensation type optical fiber, and the primary filter is connected with the second group of secondary filter by optical fiber.The technical scheme provided by the present application is to solve that a set of passive wave division multiplexer / demultiplexer can transmit 12-way 25G optical signal, to reduce the demand amount of front optical fiber, to reduce cost.
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