Coherent Optical Communications Test Challenges

This application note describes the troubleshooting needs of coherent optical communication and how to use Keysight products to improve coherent optical system testing.

Test and Measurement for Coherent Optical Transceivers

Coherent technology was traditionally used for long-haul and metro networks. However, over the years, this technology has been increasingly adopted for shorter reach applications, such as Data-Center Interconnect (DCI) and 5G/6G front/backhaul, to overcome physical limitations of Intensity-Modulation/Direct-Detect (IM/DD) as those applications demand higher throughput.

Characterizing Coherent Optical Transmission Systems

Learn how to use Keysight’s latest AWG technology in the M8195A as a digital modulation source for electrical components used in coherent transmission systems.

Essentials of Coherent Optical Data Transmission

The Application Note explains how complex modulated optical signals can maximize bit transfer efficiency in fiber optical data transmission.

Coherent Optical Solutions Using AWGs

To maximize the throughput of your existing optical networks, you must use modulation and multiplexing schemes. There are always limitations due to your system’s signal-to-noise-ratio and fiber lengths. But knowing the benefits of each technique equips you with the information you need to design and test your system. To provide the NRZ and other signals to your transmitter, you need an arbitrary waveform generator (AWG). Keysight has the AWG to fit your needs.

High-Speed Coherent Optical Transmission Characterization

Generate clean signals for high speed coherent optical transmission, at the input of your Device Under Test with Keysight’s M8195A using in-situ calibration.

Coherent Optical Modulation for Terabit Research Demo

Discover how to use the 110 GHz optical modulation analyzer system and the industry's fastest arbitrary waveform generator to achieve testing speeds exceeding 100 Gbaud.

Testing 400G Coherent Optical Components and Transceivers

Selecting the right test equipment saves valuable time and reduces costs for the development and qualification of coherent optical devices.

Everything You Need to Know About Coherent Optical Modulation

This is an introduction to the fundamentals of coherent optical modulation techniques.

Coherent Optical Component Test Enables 1.2 Terabit Applications - Case Study

Using Keysight’s state-of-the-art test equipment, NeoPhotonics successfully validated the performance of its 64 GBaud components, including its new 400ZR COSA, almost one year before the availability of DSP silicon for the transceivers. Without Keysight equipment, NeoPhotonics had no way of testing and assessing the performance of their components.

Keysight Optical Modulation Analyzers

Keysight Optical Modulation Analyzers deliver in-depth analysis of complex coherent optical signals using a combination of real-time oscilloscopes and coherent optical receivers.

Photonic and Optical Test Catalog

Explore Keysight photonic and optical test solutions engineered for optical device characterization, wavelength measurement, coherent modulation analysis, and high‑speed optical communication testing. This catalog highlights benchtop and modular optical test instruments across multiple capability classes for research, manufacturing, calibration, and coherent system validation.

Using Oscilloscopes in Optical Communications Research

Learn how coherent optical techniques are used in leading edge optical communication research and experimental systems with real-time oscilloscopes.

Full Coherent Receiver Tests Enabled At Record Speeds

Learn how Nokia Bell Labs set new world records to design a full coherent receiver for the fastest optical transmission ever with Keysight's UXR-Series oscilloscopes.

N4391C Optical Modulation Analyzer

The N4391B is the next generation Optical Modulation Analyzer based on the UXR Oscilloscope series with two bandwidth options, one ranging from 40 GHz to 70 GHz and a second one ranging from 80 GHz to 110 GHz.

N4391B Optical Modulation Analyzer

The N4391B is the next generation Optical Modulation Analyzer based on the UXR Oscilloscope series with two bandwidth options, one ranging from 40 GHz to 70 GHz and a second one ranging from 80 GHz to 110 GHz.

M8290A Optical Modulation and High-Speed Digitizer Test Solution

The M8292A optical modulation analyzer and M8296A high speed digitizer address your coherent transmitter and receiver testing needs.

400ZR – Optical Coherent Moves to Data Center Interconnects

400ZR Optical Coherent Moves to Metro-DCI

N4391SALC Optical Modulation Analysis Software

The analysis software from Keysight’s Optical Modulation Analyzer portfolio can be used on your PC without any instrumentation. It offers all the analysis capabilities including its advanced signal processing algorithms for complex modulated optical signals.

Optical Modulation Analyzer Flyer

1-page Flyer of Optical Maodulation Analyzer.