Test Featured Articles

How to ensure CFP performance

In the November/December 2011 edition of Lightwave magazine, Paul Brooks of JDSU describes in the article “New test techniques required for CFP 100G optics” how the latest generation of...

Modular vs. conventional oscilloscope approach for optical coherent modulation analysis

Modern day high-bandwidth conventional oscilloscopes are typically supplied with a maximum of four input channels (and with as few as one or two channels at a higher bandwidth rating), owing to...

Meeting the transparency testing needs of small and medium businesses

By Jean-Lou Dupont Data-Tester, Inc. In 1943, IBM Chairman Thomas Watson infamously said, “I think there is a world market for maybe five computers.” To put it mildly, that prediction...

Semiconductors offer foundation for Carrier Ethernet design

In the January/February 2011 edition of Lightwave magazine, Tao Gu, chief technology officer at Centec Networks, writes in the article “Building a configurable silicon foundation for...

LightCounting’s Kozlov predicts continued transceiver market growth

According to the July/August 2010 Lightwave magazine interview with Dr. Vladimir Kozlov, “Can the optical transceiver market sustain double-digit growth?,” the head of the market...

New approach aids advanced 40/100-Gbps modulation format characterization

By Laura Martínez and Enrique Pellejer Overview Derived from stimulated Brillouin scattering, the Brillouin optical spectrum analysis technique enables phase and amplitude measurements...

Measuring complex optical modulation in fiber

By Daniel van der Weide Overview This article reviews both sampling and real-time techniques for signal conversion, compares many of the current instruments for measurement of complex modulation...

Characterizing advanced modulation formats using optical sampling

By François Robitaille Overview The shift to more complex modulation formats for high-speed communications means a change in the way designers and network managers measure signal...

Improving test reliability and throughput for multiport components

by Anette Zimmermann OVERVIEW While bandwidth rates rise, costs must continue to fall�including the cost to test. This is particularly true when testing such multiport components as multiplexers...

Answers at hand for 100-Gbps test challenges

by Meghan Fuller Hanna Overview It's hard to test phase-modulated signal formats with instruments designed for amplitude modulation. Help for technology developers may finally be on the way,...