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Advantest
Introduces Optical Network Analyzer for Testing of Optical
Fibers and Components
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New Q7761
Includes Ability to Perform Second-Order PMD
Measurements
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TOKYO, Japan, July 11, 2003 --
Advantest Corporation (TSE: 6857, NYSE: ATE) announced
today the release of its Q7761 Optical Network Analyzer,
designed for testing of the fibers and components used
in advanced optical networks. The Q7761 is the first
optical network analyzer to include the ability to
measure second-order polarization mode dispersion (PMD),
providing engineers with a one-box solution for
measuring the main dispersion characteristics of optical
fibers and components.
The Q7761 will be on
display at InterOpto '03-- a trade show for
optoelectronic technologies to be held from July 15th to
the 18th at the Makuhari Messe convention center in
Chiba Prefecture, Japan.
Over the past few
years, in order to meet the rapidly growing demand for
bandwidth, telecommunication companies have been
actively working to boost optical network data rates
from 10 to 40Gbps and eventually 160Gbps. The
combination of faster data rates and longer transmission
distances, however, makes dispersion--the degradation of
optical signals over distance--an increasingly imposing
obstacle that can limit a system's overall transmission
capacity. Being able to precisely characterize and
compensate for dispersion in optical fibers and
components has thus become a vital step in assuring
error-free, high-speed transmissions.
In
addition to standard chromatic dispersion measurements,
the new Q7761 is also the first test instrument in its
class to offer the ability to measure second-order PMD.
This makes the Q7761 ideal for use as a cost-effective,
one-box solution for both research and manufacturing of
optical components. Built using the company's
proprietary WMT (Wizard of Module Test) modular
platform, the instrument's display can be split into
four separate windows so that engineers can view
multiple dispersion characteristics simultaneously.
The Q7761 also features a faster, built-in
tunable laser source that quickly switches back and
forth between different wavelengths and is capable of
reading a transmission's main dispersion characteristics
in 1.5s (within a 1nm wavelength range and at a
resolution of 1pm)--a 100-fold improvement over its
predecessor. This not only allows engineers to quickly
compensate for a component's dispersion characteristics,
but also helps reduce measurement errors caused by the
susceptibility of optical fibers and components to
temperature variations and surrounding vibrations. The
Q7761's laser source also possesses an improved standard
wavelength and higher linearity, allowing for an
absolute wavelength accuracy of ±5pm--a roughly
five-fold improvement over the preceding system that
makes the Q7761 suitable for use in research on fibers
and components for 40Gbps and above optical networks.
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| Measurement Items: |
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Simultaneous measurement of chromatic
dispersion (CD), group delay (GD), polarization mode
dispersion (PMD), second-order PMD (SOPMD), insertion loss
(IL), polarization dependent loss (PDL), and chromatic
dispersion slope
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| Wavelength Operating
Range: |
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1,525 to 1,625nm
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| Absolute Wavelength
Accuracy: |
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±5pm (±1.5pm when using an external
wavelength meter)
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| Sweep Time: |
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Approx. 1.5s (when measuring all
characteristics within a span of 1nm and using a resolution of
1pm)
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| Chromatic Dispersion
Accuracy: |
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±0.3%±0.1ps/nm or less (at a wavelength
resolution of 100pm)
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| Group Delay Accuracy: |
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±0.06ps
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| Polarization Mode Dispersion
Accuracy: |
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±3%±0.06ps (at a wavelength resolution of
10pm)
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| Wide Dynamic Range: |
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60dB
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