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Optical modules in 2019

2019 marked significant advancements in optical modules, with the introduction of 200G QSFP solutions, rising demand for high-speed data center interconnects, and innovations in photonics and analog chipsets.Key Technological Developments

In 2019, MACOM Technology Solutions and Cambridge Industries Group (CIG) demonstrated a complete 200G QSFP optical module solution, leveraging a high-performance analog chipset optimized for cloud data center deployment. This module used 4 x 50Gbps PAM-4 channels, featuring MACOM's MAOM-38053 four-channel transmit CDR with integrated EML driver, BSP56B photodetectors, MATA-03819 quad TIA, and MASC-38040 four-channel receive CDR, providing low power, low latency, and high throughput for dense interconnects in hyperscale environments . The industry was also preparing for 100G and 400G transceiver modules, driven by the need for faster data rates in anticipation of 5G network rollouts. Designers focused on current sensing, power efficiency, and thermal management to maintain reliable high-bandwidth communication while keeping module sizes compact .

Components and Functionality

Optical modules in 2019 typically included:

  • TOSA (Transmitter Optical Sub-Assembly): Converts electrical signals to optical signals using laser diodes (LDs) or LEDs, with integrated automatic power control for consistent output .
  • ROSA (Receiver Optical Sub-Assembly): Converts optical signals back to electrical signals using PIN or avalanche photodiodes (APDs), often paired with trans-impedance amplifiers (TIAs) and post-amplifiers for sensitivity enhancement .
  • Digital Diagnostic Monitoring (DDM): Enabled real-time monitoring of voltage, temperature, optical power, and laser bias current, ensuring interoperability and reliability .
Market Trends

The optical module market in 2019 was expanding rapidly due to data center proliferation and 5G deployment. The shift from 100GbE to 400GbE and beyond was driven by denser component integration, higher-order modulation schemes, and silicon photonics innovations, which increased throughput per module and raised average selling prices . Hyperscale data centers were upgrading optical interconnects to handle exascale data traffic, with capital expenditures on optical modules growing by 15-20% annually in top-tier facilities .

Summary

2019 was a pivotal year for optical modules, characterized by:

  • Introduction of 200G QSFP modules for cloud data centers
  • Preparation for 100G/400G transceivers to support 5G and high-speed networks
  • Advances in laser diode technology, photodetectors, and analog/digital chipsets
  • Market growth driven by hyperscale data centers, 5G infrastructure, and photonics innovations These developments laid the foundation for subsequent 400G and 800G optical modules, enabling higher bandwidth, lower latency, and more energy-efficient data transmission in modern networks .
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