Application notes and videos.

Selecting the right Optical Modulation Analyzer (OMA) for manufacturing test

One of the key questions OMA users should ask is “how much bandwidth do I need for
my OMA system?” In this application note, we take a deep dive into the relationship between
signal bandwidth and Optical Modulation Analyzer bandwidth, and clarify how much bandwidth is required to test coherent-based modulation formats in a manufacturing setting.


BERT PXIe: high-density, high-channel count Bit Error Rate Tester (video)

Quantifi Photonics’ BERT 1000 Series 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 BERT and provides a tour of the GUI for the PPG, error detection and phase and voltage eye measurement.

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Relative Intensity Noise (RIN) measurement

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


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.


Hardware triggering of Quantifi Photonics’ PXIe 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 Quantifi Photonics’ PXIe photonics modules.


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 synchronization and suffered from poor power accuracy and dynamic range in addition to requiring extra equipment. With the TRACE capability of Quantifi Photonics’ optical power meters, you can capture accurate time domain power meter readings over the entire range of the power meter (>70dB).


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.


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.

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Photonic Doppler Velocimetry (PDV)

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.

Multi-channel PDV systems (video)

In this video, David McCormick, Technical Sales Manager for North America, provides an overview of Photon Doppler Velocimetry (PDV) and provides in-depth examples of how to integrate multi-channel and multiplexing techniques using Coherent Solutions instruments in your PDV test system.

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PDV sensitivity demonstration with a class 1M target laser (video)

In this video, David McCormick, Technical Sales Manager for North America, provides an overview of Photon Doppler Velocimetry (PDV) and provides in-depth examples of how to integrate multi-channel and multiplexing techniques using Coherent Solutions instruments in your PDV test system.

Watch on YouTube

PDV Frequently Asked Questions (FAQs)

By working with many customers we have compiled a list of Frequently Asked Questions covering PDV techniques and instrument selection.

Example questions:
What velocities can be measured with the sampling rate of my oscilloscope?
What type of tunable laser sources should I choose?
Why are two laser sources needed in a typical PDV system?
Should my PDV setup be heterodyne or homodyne?