Coherent Demonstrates Industry's First 400G Differential Electro-Absorption Modulated Laser

Core Insights - Coherent Corp. has introduced the first 400 Gb/s Differential Electro-absorption Modulated Laser (D-EML), marking a significant advancement in high-speed optical networking technology for data centers [1][2]. Group 1: Product Innovation - The new 400G D-EML builds on the success of the previously recognized 200G D-EML, addressing challenges in optical transceiver designs for 1.6T and future 3.2T connectivity, driven by the rapid growth of AI infrastructure [2]. - The differential design of the D-EML effectively doubles the signal amplitude, which significantly reduces overall power consumption and minimizes crosstalk, leading to superior Optical Modulation Amplitude (OMA) and Extinction Ratio (ER) performance [2]. - An integrated on-chip termination network optimizes electrical performance, reducing the need for extensive signal pre-conditioning and enhancing signal integrity [2]. Group 2: Market Position and Future Plans - Coherent emphasizes its commitment to innovation and technology leadership, leveraging vertical integration capabilities to support the evolution of the data center market [3]. - The 400G D-EML will be demonstrated at OFC 2025 and will be available under controlled conditions upon request, while general availability of the 200G D-EML is expected in 2026 [3].