Goilips Metro and Backbone Coherent WDM Optical Transport Solution

Overview

With the broad adoption of 5G/5.5G, the continued rollout of national compute-network projects, and high-speed cross-regional data movement driven by large AI models, national backbone and metro core networks require much higher capacity, reach, and tolerance for challenging optical paths.

Traditional intensity-modulation direct-detection (IM-DD) technology is heavily limited by chromatic dispersion (CD) and polarization mode dispersion (PMD) once transmission distance exceeds 100km.

This solution is based on Goilips 100G/400G/800G CFP2-DCO digital coherent optical modules. By integrating coherent optical transmission, reception, and signal processing into standardized modules with high-performance coherent DSP, it enables reliable WDM optical transport architectures from multi-Tbps to tens-of-Tbps capacity across hundreds to thousands of kilometers.

Applications

National and Inter-Provincial Backbone Transport

For ultra-high-capacity transmission across hundreds to thousands of kilometers between national compute hubs and major regions.

Metro Core and Inter-City Connectivity

For high-density 400G/800G WDM rings and mesh networks between core central offices in provincial capitals and metropolitan clusters.

Research, Private, Power, and Transportation Backbones

For cross-province government, enterprise, research, power, and transportation networks that require high reliability and must operate over aged, high-dispersion fiber routes.

Deployment & Architecture

In backbone and metro core WDM/OTN equipment or core routers, Goilips CFP2-DCO coherent modules are directly deployed and connected to passive or active ROADM systems for flexible wavelength routing and long-haul transmission.

Goilips Metro/Backbone Coherent WDM Optical Transport Network Solution

100G Coherent Long-Haul

Core Deployment：DP-QPSK modulation with 50GHz channel spacing, supporting 2,000km - 3,000km+ transmission without electrical regeneration.

Advantage：Ideal for complex ultra-long-haul national backbone and aged fiber links with severe dispersion.

400G Coherent Metro and Provincial Backbone

Core Deployment：DP-16QAM or derated DP-QPSK modulation over 75GHz / 100GHz spectrum spacing.

Advantage：Supports 1,000km - 1,500km spans for metro core and provincial backbone main routes.

800G Coherent High-Capacity Channels

Core Deployment：DP-64QAM or DP-16QAM modulation over 100GHz / 150GHz flexible-grid channels.

Advantage：Delivers 300km - 800km high-density interconnect for metro core and intra-province ultra-large-capacity transport.

ROADM and Flex-Grid Wavelength Scheduling

Core Deployment：Supports C-band and extended L-band tunability with flexible grid technologies.

Advantage：Increases single-fiber capacity to 30Tbps - 48Tbps+ and enables wavelength-level non-blocking optical-layer scheduling.

Key Benefits

1

Ultra-Long Reach Without Electrical Regeneration

Strong CD/PMD tolerance removes the need for frequent intermediate regenerators, reducing optical transport sites and OTN equipment investment.

2

Maximized Fiber Asset Utilization

400G/800G higher-order modulation with C+L band expansion multiplies capacity on existing fiber without laying new optical cables.

3

Flattened Architecture and Elastic Scheduling

Together with ROADM systems, the solution supports all-optical wavelength-level non-blocking cross-connects, reducing service turn-up from weeks to minutes.