Application Notes & Resources


BERTPXIe – high-density, high-channel count Bit Error Rate Tester

Coherent Solutions’ BERTPXIe is a 2 or 4-channel PPG and Error Detector for the design, characterization and production test of optical transceivers and opto-electrical components at data rates up to 30 Gb/s. In this video, David McCormick provides an overview of the features of the BERTPXIe and provides a tour of the GUI for the PPG, error detection and phase and voltage eye measurement.

BERTPXIe Bit Error Rate Tester Overview & Tour


Relative Intensity Noise (RIN) Measurement

Semiconductor laser Relative Intensity Noise (RIN) is an important parameter that can cause significant degradation to the performance of fibre optic communications links. It is important for both laser manufacturers and systems designers to understand how RIN is measured to ensure reliable, accurate and repeatable results.

Relative Intensity Noise (RIN) Application Note 


Photonic Doppler Velocimetry

The velocity measurement of fast-moving materials is essential to several areas of scientific and technical investigations, and new applications will continue to be found.

Photonic Doppler Velocimetry Application Note  

Photonic Doppler Velocimetry Frequently Asked Questions  

An Overview of Wavelength Agile Photon Doppler Velocimetry 

Sensitivity Demonstration with a Class 1M Target Laser 


Measuring Laser Linewidth

Low linewidth lasers are important for use in systems such as coherent communications, fiber optic sensors, interferometric sensing and gas detection. This application note covers the theory and importance of laser linewidth measurements, especially as they relate to low-linewidth lasers.

Measuring Laser Linewidth Application Note  


Hardware Triggering of Coherent Solutions’ PXI Optical Modules

PXI’s integrated timing and hardware triggering capabilities offer a number of advantages over more traditional software-initiated measurements. Learn how to make the best use of the hardware triggering capability present in Coherent Solutions’ PXIe photonics modules.

Hardware Triggering Application Note 


Transient Testing in PXI

Until recently, measurements of power versus time were only available using expensive oscilloscopes and optical-to-electrical converters. These solutions required complex synchronisation and suffered from poor power accuracy and dynamic range in addition to requiring extra equipment.

With the TRACE capability of the optical power meters from Coherent Solutions, you can now capture accurate time domain power meter readings over the entire range of the power meter (>70dB).

Transient Testing in PXI Application Note 


100G and 400G optical transceiver test configurations (video)

Defining and configuring a tightly integrated test system that can scale with the many SFP Application Codes of optical transceivers can be challenging. By selecting a flexible and future-proof test platform, many of the common challenges can be overcome. This in-depth video provides an overview of  100G and 400G transceiver test configurations using a PXI system.

100G and 400G optical transceiver test configurations  

Testing optical transceivers designed for aerospace and defense applications

Optical transceivers are increasingly being deployed into non-datacom applications in the automotive, aerospace and defense industries. As the transceivers form a core part of data connectivity, testing various aspects of their performance in a range of environments is an important part of the system construction. In this application note, using the PXI platform we will showcase some of the common test configurations designed for transceivers which use multi-fiber channels of multimode fiber (MMF), running at the wavelength range of 850nm.

Automated optical transceiver testing in PXI Application Note