On March 12, 2026, Keysight Technologies, Inc. (NYSE: KEYS) announced the launch of its innovative N4378A Lightwave Component Analyzer (LCA), designed to address the increasing test challenges associated with next-generation optical components. With a remarkable capacity for calibrated S-parameter measurements up to 220 GHz, the new LCA aims to enhance the performance and validation processes for optical transceivers used in artificial intelligence (AI) and data center applications.

2. Meeting the Demands of Modern Data Centers

As the demand for higher data rates continues to surge, driven largely by AI and machine learning workloads, data centers are undergoing a significant transformation. This evolution requires precise characterization of electro-optical (E-O) and opto-electronic (O-E) components at unprecedented frequencies. The N4378A LCA is engineered to integrate seamlessly with Keysight’s PNA-X Vector Network Analyzer and frequency extenders, offering a scalable platform for single-sweep, broadband measurements at both 1310 nm and 1550 nm wavelengths.

3. Key Features and Benefits of the N4378A LCA

The N4378A Lightwave Component Analyzer boasts several key features that enhance its appeal to engineers and developers:

Single-Sweep Characterization: With the capability to perform single-sweep characterization up to 220 GHz, the LCA provides deeper insights into critical components like photodetectors and optical modulators.

Versatile Application Support: The analyzer supports O-band data center interconnects along with C/L-band terrestrial and submarine applications, consolidating the functionality of multiple instruments into one.

Dual-Drive Optical Modulator Validation: The device is equipped with differential measurement capability, facilitating the validation of next-generation dual-drive optical modulators.

User-Friendly Design: It offers a quick-release mechanical fixture that protects sensitive 0.5 mm coaxial connections, allowing engineers to reposition between calibration and measurement with ease.

4. Accelerating Innovation in Optical Interconnects

Dr. Joachim Peerlings, Vice President of Network and Data Center Solutions at Keysight, remarked on the significance of the N4378A LCA, stating, “With the introduction of Keysight’s 220 GHz Lightwave Component Analyzer, we are enabling the industry to validate transceiver component designs for next-generation optical interconnects.” He emphasized that the combination of optical bandwidth with wideband wavelength coverage and a robust 0.5 mm coaxial ecosystem allows engineers to correlate simulations with real-world measurements, thereby accelerating time-to-market for new technologies.

5. A Demonstration at OFC 2026

Keysight Technologies is set to showcase the N4378A Lightwave Component Analyzer for the first time at the Optical Fiber Communication Conference (OFC) 2026, which will take place from March 17 to March 19, 2026, in Los Angeles. This event will provide an excellent platform for industry professionals to experience firsthand the capabilities of the latest advancements in photonics test solutions.

6. Conclusion

As the landscape of data centers becomes increasingly complex and bandwidth-hungry, Keysight Technologies continues to drive innovation in optical testing. The N4378A Lightwave Component Analyzer represents a significant step forward in validating next-generation optical transceiver technology, empowering engineers to push the boundaries of design and deliver high-performance optical interconnects that will shape the future of data center operations.

For more information about the N4378A Lightwave Component Analyzer and its specifications, visit Keysight's product pages and technical resources.

Original press release