TRADE NEWS: Agilent Technologies Introduces Physics-Based VCSEL Model to
Solve Challenges in Designing Rack-to-Rack Opto Links
SANTA CLARA, Calif. -- October 23, 2013
Agilent Technologies Inc. (NYSE:A) today introduced a physics-based model for
its opto model library that quickly and accurately solves the challenges posed
by signal distortion in vertical cavity surface emitting lasers (VCSELs) used
in rack-to-rack opto links. The new VCSEL model, available in the Advanced
Design System 2013 Transient Convolution Element and SystemVue 2013 AMI
Modeling Kit, is used both for modeling optoelectronic components and
designing them into equipment.
Before the multigigabit era, rack-to-rack digital signals propagated tens or
even hundreds of meters across CAT-5 twisted pair or co-axial copper cables
with little distortion. However, at today’s speeds, rising and falling edges
degrade after travelling only a few meters. Laser technologies like VCSELs
have pushed down the cost of optoelectronics to the point where optical fiber
communication is now replacing traditional copper cabling for spans over about
10 meters in the multigigabit regime.
Up to now, simulation tools used to design these nonlinear devices required
engineers to learn a whole new optical paradigm. With the new VCSEL model,
however, Agilent is leveraging a technique that high-speed digital engineers
are already familiar with—the Input/Output Buffer Information Specification
(IBIS) AMI flow. Senior Agilent engineers contributed this innovative model to
document BIRD-156 of the IBIS Open Forum. BIRD-156 extends the AMI flow to
allow both electrical and optical repeater links to be modeled and was
incorporated in the recently ratified IBIS version 6.0. Agilent co-authors
will present a paper, “Modeling, Extraction and Verification of VCSEL Model
for Optical IBIS AMI,” at DesignCon 2014, to be held in January in Santa
With the VCSEL model, SystemVue 2013 now offers model builders, such as
optoelectronic component vendors, a tool that supports the evolution of IBIS
and can build rack-to-rack opto link models. The models run in ADS, the tool
that opto component consumers (data center and telecoms equipment
manufacturers, for example) use to design these subsystems into their larger
systems. SystemVue 2013 also now features an enhanced model for the clock/data
recovery circuitry found in both optical and electrical retimers.
“With our previous opto model library release we added a simpler class of
VCSEL model with frequency-independent behavior,” said Colin Warwick, product
manager for High-Speed Digital Design at Agilent EEsof EDA. “With this
release, we’re adding not only a physics-based, frequency-dependent model that
uses rate equation techniques, but also a tool to fit the rate equation
parameters to measured data, ensuring an accurate model.”
U.S. Pricing and Availability
Agilent’s Advanced Design System 2013 and SystemVue 2013 are available now.
Pricing depends on the exact configuration. An image is available at
Agilent offers a wide selection of high-speed digital solutions including
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About Agilent EEsof EDA Software
Agilent EEsof EDA is the leading supplier of electronic design automation
software for microwave, RF, high-frequency, high-speed digital, RF system,
electronic system level, circuit, 3-D electromagnetic, physical design and
device-modeling applications. More information is available at
About Agilent Technologies
Agilent Technologies Inc. (NYSE:A) is the world’s premier measurement company
and a technology leader in chemical analysis, life sciences, diagnostics,
electronics and communications. The company’s 20,500 employees serve customers
in more than 100 countries. Agilent had revenues of $6.9 billion in fiscal
2012. Information about Agilent is available at www.agilent.com.
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