Product category:
Stand-Alone Instruments
News Release from: Advantest (Europe) | Subject: Q7607
Edited by the Electronicstalk Editorial
Team on 19 March 2002
Chirp tester addresses current and
future systems
Available now from Advantest, the Q7607 chirp test set addresses one of the new testing challenges presented by broadband high-speed telecomms networks.
Available now from Advantest, the Q7607 chirp test set addresses one of the new testing challenges presented by broadband, high-speed telecommunication networks As telecommunication networks such as digital subscriber lines and 3G wireless networks continue to both grow in capacity and attain faster datarates, it becomes increasingly vital to ensure that chirp (the slight shifts in wavelength that occur when lasers rapidly emit optical pulses) does not interfere with signal quality
This article was originally published on Electronicstalk on 11 May 2001 at 8.00am (UK)
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The Q7607 is a dedicated chirp test solution that has the ability to test optical pulses with datarates up to 50Gbit/s within a dramatically reduced measurement time of less than 30s.
Having already successfully introduced the current generation of 10Gbit/s DWDM (dense wavelength division multiplexing) systems, optical engineers are already hard at work developing next-generation, 40Gbit/s systems.
The faster these datarates get, however, the greater the chance that dispersion and chirping will reduce signal strength and thus cut short transmission distances.
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Therefore, to properly adjust for these factors, it is vital that the designers of DWDM systems be able to accurately determine the path and frequency fluctuations of the optical pulses being emitted.
To help DWDM designers bring 40Gbit/s systems to market, the Q7607 incorporates several new features that slash measurement times while improving measurement accuracy.
For example, along with its ability to measure the chirp of pulses transmitting at 10Gbit/s - a function inherited from the company's previous offering - the Q7607 has the added ability to test optical pulses travelling at speeds of up to 50Gbit/s.
And, to ensure that the chirp of such high-speed optical pulses are measured precisely, the Q7607 possesses an expanded demodulation bandwidth of 100GHs and a new interferometer that has a wide, 300GHs free spectral range.
Moreover, through the use of Advantest's unique interferometric method for deriving frequency-modulation (FM) and intensity-modulation (IM) components, chirp measurement times have been dramatically reduced to 30s or less.
In addition to its high-end interferometer, the Q7607 also comes equipped with an interferometer optimised for 10Gbit/s testing, making it possible for engineers to switch between testing of 10 or 40Gbit/s pulses with the touch of a single key.
Another improvement that will help ease the burden of testing is the Q7607's optional built-in optical amplifier, which covers both C-band (1530 to 1570nm) and L-band (1570 to 1610nm) optical frequencies and automatically adjusts its gain.
Previously, when using an external amplifier it was necessary to make complicated adjustments to its optical output power and optical gain.
Choosing this option, however, completely eliminates the need to make such adjustments, making the Q7607 an efficient solution for production-line testing.
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