Coherent optical technology is broadly used in data center interconnect, metro and long-haul applications. These coherent optical systems have demanding technical specifications with today’s optical transceivers enabling providers to support up to 400G and next-generation transceivers up to 800G. We are at the forefront of the development of implementation agreements and standards to provide and recommend test solutions. Discover how Keysight can help at each stage of coherent communications development with solutions that shorten time-to-market, reduce cost-of-test and enable new technologies. 

Coherent Optics Transceiver Test

Telecom and Datacom transceivers using coherent optical transmission technology are optimized based on reach, spectral efficiency, and power consumption. To ensure optimization, you need a flexible and scalable test solution for the analysis of dual polarization in-phase and quadrature (IQ) signals. Performing common measurements, such as error vector magnitude (EVM), IQ offset, IQ imbalance, quadrature error and skew, is complex in optical coherent signal analysis. For coherent transmission test, multichannel arbitrary waveform generators are typically used to synthesize complex modulated signals. In addition, optical modulation analyzers provide detailed insights into the complex modulated optical signals at the physical layer to determine signal quality or evaluate components that are designed for IQ modulation and demodulation. Keysight offers the widest range of optical modulation analysis instruments for your current and future needs.

Coherent Optics Receiver Test

To thoroughly test your optical receiver, you need to stimulate it with complex waveforms using different modulation formats and data sources. It is also important to de-skew and pre-distort input signals to account for any linear impairments in your test setup and measure the true accuracy of your optical receiver. Keysight’s solutions are designed to protect your investment by enabling the same equipment to be used for multiple purposes, such as electrical and optical receiver test for 100G, 400G, and advanced research for 800G. In addition, our compliance test software supports custom test definitions to characterize the performance of modules or transmitter/receiver optical sub-assemblies during the design and development phases.

Coherent Optics Device Test

Electro-optical and opto-electrical components used in coherent optical transmission systems have unique test challenges. For example, to test dual-polarization IQ modulators and intradyne coherent receivers, it is necessary to measure the insertion loss during transmission. To fully characterize your optical coherent devices, you need to analyze many parameters including bandwidth, gain, imbalances, group delay, and skew. These measurements are complex and time-consuming. We can help you save valuable test time, reduce costs, and ensure the accuracy of your optical coherent devices.

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