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JDS
Uniphase's Dynamic Gain Equalizer Extends System Reach Reduces Costs for
10 and 40 GB/s Optical Systems Ottawa, Canada and San
Jose, California – JDS Uniphase Corporation (Nasdaq:
JDSU and TSE: JDU) today announced its Dynamic Gain Equalizer (DGE) which
optimizes amplifier performance, thereby offering significant savings
potential for 10 Gb/s ultra-long haul and 40 Gb/s long haul fiberoptic
communications networks. The improved system performance provided by the
DGE extends the signal reach obtained through the use of amplifiers,
thereby increasing the distance between (and reducing the need for) costly
regeneration equipment. The DGE helps to optimize
fiberoptic system performance by compensating for uneven gain provided by
optical amplifiers across the various wavelengths. Methods of fixed
compensation using gain flattening filters do not address gain tilt and
can exhibit large residual ripple, both of which can be compounded to
unacceptable levels in a cascaded chain of amplifiers. In contrast, the
DGE, which has an attenuation resolution of 0.1 dB, provides dynamic
compensation that eliminates those imperfections. The key feature of the
DGE is that it simultaneously provides a smooth optical attenuation
profile of wavelengths (low wavelength resolution) and compensates for
local spectral features (high wavelength resolution). This feature
differentiates the DGE from similar products that are not as effective at
modifying the attenuation of one part of the spectrum without compromising
the other portions of the profile. The wavelength resolution of the DGE is
2.6 nanometers. For optical systems that
are designed to offer increased flexibility and wavelength management, the
DGE can be reconfigured remotely to respond to changes in gain profiles
that occur in a dynamic network. Another way that the DGE
can be used to improve system performance is to configure a spectral
profile that is optimized for a specific design such as in the case of
Raman amplification. In addition, DGE compensates for performance
variations over the life of the system or as a result of operating
conditions such as changes in temperature or aging of components. The DGE module includes a
circuit card assembly that can be connected directly to a system
motherboard, reducing the integration required by the system manufacturer.
To reconfigure, the desired attenuation profile is sent electronically via
a digital interface. Availability For more information about this JDSU product: www.jdsu.com
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