Show Highlights--OFC/NFOEC and Measurement Science Conference
Staff -- Test & Measurement World, 5/1/2010 12:00:00 AM
Bandwidth demand pushes optical communications
OFC/NFOEC conference and exhibition, March 21–25, San Diego, CA,www.ofcnfoec.org.
At this year's OFC/NFOEC, it became clear that 40G/100G Ethernet is for real, and the economy is rebounding. Many people reported improving business because the demand for bandwidth keeps growing.
Alcatel-Lucent executive VP Philippe Keryer told an audience that 100G Ethernet will arrive in core networks this year. "This will be the year of coherent modulation," he said, "using the same infrastructure as today's 10G Ethernet."
Exfo demonstrated 100G (111-Gbps) transmissions using its optical modulation analyzer and an Ixia 40G/100G Ethernet tester. Exfo also exhibited its constellation analyzer and its optical sampling oscilloscopes.
Agilent Technologies introduced an optical modulation analyzer for 28/32-Gbaud transmitters and links. Agilent also introduced single-port and four-port tunable laser modules and two-channel and four-channel multimode attenuator modules for its 77-Series optical test instruments.
Yokogawa demonstrated the AQ1200 Multi Field Tester OTDR. The company's AQ7275 OTDR supports optical links from the home through the network core, and its AQ1300 10G Ethernet tester includes electrical and optical ports for 10-Mbps through 10-Gbps links.
Aragon Photonics exhibited its Bosa Phase optical complex spectrum analyzer that displays complex spectrums, complex fields, eye diagrams, and constellation diagrams. Centallax exhibited its 12.5-Gbps parallel-channel BER tester, its 40-Gbps BER tester, and its 10-Gbps BER testers, clock-recovery modules, and clock synthesizer.
Anritsu's MS9740A optical spectrum analyzer has a better than 58-dB dynamic range and –90-dBm minimum light-reception sensitivity. Averna demonstrated its Proligent data-analysis software used for optical tests. JDSU exhibited the ONT-506 40G/100G network physical-layer tester. Tektronix showed the DSA8200 digital phosphor oscilloscope series with optical modules. Optametra exhibited its 28-GHz coherent receiver connected to LeCroy and Tektronix oscilloscopes. The receiver lets you analyze QPSK signals with constellation diagrams and eye diagrams. Picosecond Pulse Labs exhibited its pattern generators and BER testers with LeCroy oscilloscopes.
Synthesys Research showed the BertScope with an increased speed of 26 Gbps for 100-Gbps links. The company's 25000A clock-recovery unit now runs at 28 GHz. ILX Lightwave exhibited is 7900B laser-diode test system. Luna Technologies showed its OVA 5000 optical vector network analyzer and its Optical Backscatter Reflectometer platform—a high-resolution OTDR with millimeter resolution that helps users find faults in optical fibers close to connectors.
Optical transducer manufacturer Opnext had several demos of 40G and 100G optical links. A 100GBase-LR4 demo used an Ixia 40G/100G Ethernet tester connected through 120 km of fiber to an Anritsu MS9710C optical spectrum analyzer. Another demo featured a 40G-LR4 link, which consisted of four 10-Gbps links running on four wavelengths in a single fiber.
Aldrin buzzes at MSC
Measurement Science Conference, March 22–26, Pasadena, CA,www.msc-conf.com.
Former astronaut Buzz Aldrin spoke during the 2010 MSC luncheon about how measurements played an important role in the space program. He pointed out how reaching the moon was truly a joint effort among NASA; numerous companies; Congress; Presidents Kennedy, Johnson, and Nixon; and the American people.
Technical sessions covered issues such as RF and temperature measurements, measurement uncertainty, and metrology education. In the RF measurement session, Mike Ashcroft of Fluke discussed calibrating spectrum analyzers so they have minimal effect on measurements. He noted that you need to understand the harmonic distortion that a spectrum analyzer adds to a measurement, and he discussed how to test for distortion. He suggested that you set the mixer at around –30 dBm and look at relative amplitude. Then, change the input attenuation by 10 dB. If the distortion doesn't change, then the spectrum analyzer isn't contributing to the distortion.
Fluke exhibited a multifunction calibrator for handheld digital multimeters and analog meters. Tegam introduced an RF transfer standard that covers frequencies up to 26.5 GHz. Applications include automotive collision-avoidance systems and wireless HDMI.
Agilent Technologies exhibited several signal analyzers, including the PNA (N5242A), which is designed for noise-source calibration. Spectracom exhibited a line of microwave instruments it has acquired from Pendulum Instruments as well as its 8195B GPS master oscillator. Guildline Instruments demonstrated its 6623A-300 current source and the 6664 scanner for automating high-resistance measurements.
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