Product category:
Opto and Fibre Test Equipment
News Release from: JDSU | Subject: OSA-320 module
Edited by the Electronicstalk Editorial
Team on 17 December 2007
Optical spectrum analyser finds the true
SNR
The JDSU OSA-320 module has been engineered to test optical performance in the Agile Optical Network.
JDSU has added improved measurement analysis to its industry-leading in-band optical spectrum analyser (OSA) for the T-BERD/MTS-8000 The OSA-320 module, a high-performance optical spectrum analyser, incorporates a unique and highly accurate method for measuring the "true" optical signal-to-noise ratio (OSNR) in reconfigurable optical add/drop multiplexer (ROADM) networks
This article was originally published on Electronicstalk on 24 Oct 2005 at 8.00am (UK)
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The JDSU OSA-320 module was engineered to test optical performance in the Agile Optical Network (AON), a dynamically reconfigurable DWDM network that is designed to accelerate triple-play service deployment, simplify network management, and enable advanced wavelength applications at significantly reduced costs.
In the AON, multiple ROADMs with different "filtering" technologies can be cascaded in a link, creating OSNR measurement problems for conventional OSA devices that employ out-of-band methods.
Even the most recent OSA devices using the "shoulder method" may not provide accurate OSNR results for different ROADM filter shapes at high datarates.
With JDSU's improved measurement analysis it is possible to accurately measure the "true" OSNR in all deployment scenarios of ROADM networks (from 10G to 40G), regardless of the filter type integrated into the ROADM.
"The new measurement algorithm for the JDSU OSA-320 helps address a major challenge in testing ROADM networks", says Enzo di Luigi, General Manager of JDSU's Fibre Optics Test and Measurement group.
"Accurately measuring OSNR requires a strong understanding of ROADM network components and architectures, and JDSU is uniquely positioned among test equipment providers to leverage optical leadership in the ROADM market, including active and passive components and network solutions, allowing us to bring smarter ROADM test solutions to market faster".
In ROADM networks, each channel may traverse different routes, optical amplifiers, and add-drop filters, resulting in different OSNR for each channel.
Conventional OSA measurements are unreliable, as they indicate OSNR values that are too high - up to 10dB above the true OSNR.
JDSU's OSA-320 follows an optical polarisation splitting (OPS) method for measuring OSNR inside the optical channel (in-band OSNR), providing the highly accurate: "true" OSNR.
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