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Project Quotation 400G Coherent Optical Module

The cost of a 400G optical module varies widely, ranging from approximately $1,400 for short-reach SR8 modules to over $130,000 for long-haul coherent ZR+ modules, depending on type, transmission distance, and vendor.Pricing Overview
  • Short-Reach Modules (SR8): Typically used for in-rack or cross-row data center connections, priced between $1,400 and $1,800 from reputable third-party vendors .
  • Medium-Reach Modules (DR4, FR4): Suitable for data center rows or campus links, prices are moderately higher, reflecting longer transmission distances and higher performance requirements .
  • Long-Haul Modules (LR4, ZR, ZR+): Designed for data center interconnects (DCI) and long-distance telecom links, OEM LR4 modules can exceed $10,000, while ZR+ coherent modules may reach $130,000 .
Module Types and Form Factors
  • QSFP-DD and OSFP: Common form factors for 400G deployment, enabling high-density, high-bandwidth interconnects .
  • Transmission Technologies: Modules may use EML-based optics or silicon photonics, with EML dominating the market at over 50% share in 2025 .
  • Transmission Distance: DR4 and DR4 Plus modules captured the largest market share at 34.2% in 2025, reflecting their widespread use in cloud and telecom networks .
Market Trends and Considerations
  • The global 400G optical module market is growing rapidly, projected to expand from $5.8 billion in 2025 to $36.2 billion by 2034, driven by cloud computing, hyperscale data centers, and 5G network expansion .
  • Cost drivers include module type, transmission distance, vendor (OEM vs third-party), and volume discounts. Third-party vendors often provide significant cost savings for standard short-reach modules .
  • Adoption Factors: Enterprises and telecom operators are transitioning from 100G to 400G to maximize fiber utilization and reduce per-bit transmission costs, with silicon photonics and miniaturization lowering module costs over time .
Quotation Guidance

For a project quotation, consider the following:

  1. Define the required module type (SR8, DR4, FR4, LR4, ZR+) based on transmission distance and network topology.
  2. Select the form factor (QSFP-DD or OSFP) compatible with existing switches and routers.
  3. Determine vendor preference: OEM modules offer guaranteed performance and support, while third-party modules provide cost-effective alternatives for standard deployments.
  4. Estimate volume: Bulk purchases may qualify for tiered discounts, reducing the total cost of ownership.
  5. Include TCO considerations: Factor in power consumption, cooling, and replacement cycles for a comprehensive project budget . By aligning module selection with network requirements and budget constraints, a precise project quotation can be prepared, ranging from $1,400 per short-reach module to over $130,000 for high-end long-haul modules, with intermediate options available for medium-distance deployments.
Project Quotation 400G Coherent Optical Module

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Technical note

This reference is intended for preliminary fiber optic patch cord research. Compatibility, link budgets, connector types, polish, installation methods, test limits and applicable standards must be verified for the specific project.

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