100G of stock optical receivers

100G optical receivers are high-speed fiber optic modules designed to detect and convert 100-gigabit signals using coherent or direct-detect technologies, supporting DP-QPSK and 16-QAM modulation formats.

Overview

100G optical receivers are essential components in modern data center, enterprise, and telecom networks, enabling high-bandwidth connectivity over fiber optic links. They convert optical signals into electrical signals for further processing, supporting 100 Gb/s Ethernet and beyond. These receivers are available in coherent and direct-detect architectures, with coherent receivers offering superior performance for long-haul and metro networks due to advanced DSP and polarization management .

Key Technologies

• Coherent Receivers: Use Dual Polarization QPSK (DP-QPSK) or 16-QAM modulation to maximize spectral efficiency. Integrated designs often include optical hybrids, balanced photodetectors, and TIAs in a compact package, simplifying fiber routing and skew management .
• QSFP28 Form Factor: The 100G QSFP28 transceiver is the industry standard for 100G Ethernet, using four 25G lanes aggregated to 100G. Variants include SR4, LR4, CWDM4, and ZR4, optimized for different distances and fiber types .
• Direct-Detect Receivers: Typically used for short-reach applications, offering simpler design and lower cost but limited reach compared to coherent solutions .

Applications

• Data Center Interconnects: Short-reach QSFP28 modules (SR4) for intra-rack or inter-rack connections.
• Metro and Long-Haul Networks: Coherent receivers with LR4 or ZR4 modules for distances up to hundreds of kilometers.
• Enterprise Core Networks: High-density QSFP28 modules for backbone connectivity.

Selection Considerations

When choosing a 100G optical receiver, consider:

1. Reach Requirements: SR4 for short distances, LR4 for long-reach metro, ZR4 for extended long-haul.
2. Fiber Type: Single-mode vs multimode compatibility.
3. Modulation Format: DP-QPSK or 16-QAM for coherent receivers.
4. Integration Level: Fully integrated receivers reduce fiber routing complexity and improve reliability .
5. Form Factor Compatibility: Ensure QSFP28 or other module types match your switch or router ports .

Purchasing Options

100G optical receivers are available from distributors like Mouser Electronics, EPS Global, and manufacturers such as Discovery Semi and Optoplex, offering datasheets, pricing, and technical support for both coherent and direct-detect modules . By understanding these specifications and deployment requirements, network engineers can select the appropriate 100G optical receiver to ensure high-performance, reliable, and scalable network connectivity.