Passive Single-Fiber CCWDM Module Application Case: Smart Park Backbone Network Upgrade

As a comprehensive science and technology park integrating R&D, office, and data center functions, the park’s original fiber backbone network adopted a traditional dual-fiber transmission mode. With the growth of enterprises settled in the park, the expansion of HD monitoring, IoT terminals, and data center services, the existing fiber resources gradually became saturated. New fiber laying was costly, time-consuming, and could not meet the business demands for bandwidth and latency.

• Increase backbone bandwidth without adding new fibers.
• Realize single-fiber bidirectional transmission to reduce network deployment costs.
• Ensure stable transmission of multiple services (data, video, IoT) and support future business expansion.

HJY’s technical team, in combination with the park’s existing network architecture, adopted a passive single-fiber CCWDM WDM solution by deploying 4-channel CCWDM modules (TX: 1470/1510/1550/1590nm, RX: 1490/1530/1570/1610nm). This enabled single-fiber bidirectional 8-wavelength transmission, quadrupling the original single-fiber bandwidth.

• Core Nodes: Deploy HJY 4CH CCWDM modules at the park’s data center and each building’s aggregation node to complete bidirectional data transmission over a single fiber.
• Service Bearer:
• 1470nm/1490nm: Bear park office data services
• 1510nm/1530nm: Bear HD video monitoring services
• 1550nm/1570nm: Bear IoT terminal data collection services
• 1590nm/1610nm: Reserved for data center interconnection services
• Passive Characteristics: The modules require no power supply and have no active components, reducing O&M costs and failure points while improving network reliability.

• Bandwidth Improvement: Single-fiber capacity increased from 1Gbps to 4Gbps, meeting business growth demands for the next 3–5 years.
• Cost Optimization: Avoided new fiber laying, saving approximately 60% of network expansion costs, and shortened the deployment cycle to 2 weeks.
• Service Stability: The passive design ensured 7*24-hour stable operation of multiple park services with no packet loss or latency fluctuations.
• Scalability: Reserved wavelength channels support subsequent new services without replacing core equipment.

• Provides customized WDM solutions to adapt to bandwidth and cost requirements in different scenarios.
• Passive CCWDM modules feature low loss, high reliability, and easy deployment, and are widely used in parks, data centers, radio and television, and other fields.
• Full-process technical support: Provides one-stop services from solution design and on-site deployment to O&M guarantee for customers.