Tag: Lyle School of Engineering

Will high-density PICs be the next big thing?

Post author By Margaret Allen
Post date January 5, 2010

Gary Evans in SMU’s Photonics Lab.

Lasers have the potential to improve and revolutionize human lives in many ways, from consumer electronics and communications to medical equipment and homeland security. Helping unlock the barriers to these advancements is the research of SMU Electrical Engineering Professor Gary Evans.

Evans has been recognized by his peers for his contributions to the development, design and fabrication of semiconductor lasers, microscopic manufactured devices that can amplify subatomic light particles called photons.

This technology, in turn, can lead to applications that transmit data, energy, pictures or sound.

The field of photonics already has many claims to fame: Laser pulses deliver information through glass fibers to create the high-speed Internet; certain wavelengths of laser light are used in cancer therapy; lasers read CDs and DVDs; and at industrial plants, lasers cut materials with precision.

New Paluxysaurus mount

3D dinosaur track

Hunt for Higgs boson

But future development of high-power applications requires research advancements of the kind Evans is tackling in his laboratory: He is looking for a way to fit billions of lasers and other optical components atop a microscopic chip.

The challenge is similar to the one faced in the late 1950s by the engineers who developed the electronic integrated circuit. The revolutionary high-density electronic integrated circuit paved the way for powerful hand-held calculators, laptop computers and myriad microelectronic devices and technology that have transformed the world.

Evans and other researchers believe photonic integrated circuits (PICs) may have that same vast potential, but there are technical problems to resolve. One key to manufacturing high-density PICs, which can hold billions of optical devices, is an “isolator.” An isolator would allow photons to flow unrestricted in the forward direction, but would prevent any reflected light from traveling backward. Without an isolator, unavoidable reflections would cause instabilities and chaos in the PIC.

“An isolator allows integration of large numbers of lasers and other optical components to produce stable, robust photonic circuits,” Evans says. Since 1994 he and Jacob Hammer, a retired colleague from RCA Labs, have been working along with graduate students to develop an isolator.

“We have a good understanding of the theory and we realize what problems need to be solved to make an integrated isolator in a semiconductor,” Evans says. “But more theory needs to be done to understand the materials that need to be developed. The materials just don’t exist yet.”

He is seeking federal funding to continue collaborations with Hammer, the University of California, Santa Barbara and the U.S. Naval Research Laboratory to develop those materials.

Since 2001 the team has received $250,000 in federal funding for isolator research. Some funding for Evans’ research also has been awarded to Photodigm Inc., a company he co-founded. Photodigm specializes in photonics technology for communications, digital imaging, defense and medical device applications. The Richardson-based company has contracts with the U.S. Department of Defense, among others.

Evans joined SMU in 1992, the year he also received one of electrical engineering’s top honors: election as a Fellow of IEEE, the technology industry’s professional association. The association cited Evans for contributions he has made to the industry’s development, fabrication and understanding of semiconductor lasers.

Over the years, Evans’ research has been conducted in conjunction with others, including the larger SMU photonics team: Jerome Butler, University Distinguished Professor of Electrical Engineering; Jay Kirk, SMU electrical engineering laboratory manager and a co-founder of Photodigm; and Marc Christensen, chair and associate professor of the Electrical Engineering Department and a member of Photodigm’s technical advisory board. — Margaret Allen

Tags Gary Evans, Jay Kirk, Jerome Butler, Lyle School of Engineering, Marc Christensen, SMU Department of Electrical Engineering

Researcher news Technology

The 33 news: SMU developing micro camera for front-line soldiers

Post author By Margaret Allen
Post date July 9, 2009

Southern Methodist University researchers are taking a different approach to producing photo and video images for military surveillance cameras outfitted on unmanned aerial vehicles and helmets. Walt Maciborski of The 33 news broadcast in Dallas reported July 8 on research in the lab of Electrical Engineering Associate Professor Marc Christensen.

Watch the video

Excerpt:

By Walt Maciborski
KDAF: The 33
DALLAS — Cutting edge micro cameras are being developed in a basement lab at Southern Methodist University. The project is code-named Panoptes, more on its name later.

Associate Professor Marc Christensen says his undergraduate and graduate researchers at SMU’s Photonic Architectures Lab are about to take a giant leap into the future of photography.

“What we’re working on here is trying to develop the next generation of cameras,” Christensen says.

Christensen’s team is creating video and still cameras that are as thin as about two credit cards, covered with tiny mirrored lenses.

“The original program was driven by the department of defense, (because) they have a need to have tactical imagery, and they don’t want to only have it on platforms that are as large as a Predator UAV (unmanned aerial vehicle), ” Christensen says. “They would like to fit this camera on something the size of a model airplane or something that could fit in the palm of your hand.”

Read the full story.

Tags Lyle School of Engineering, Marc Christensen, SMU Department of Electrical Engineering

Researcher news Technology

Wired: DARPA’s smart, flat camera packed with beady eyes

Post author By Margaret Allen
Post date July 1, 2009

Southern Methodist University researchers are taking a different approach to producing photo and video images for military surveillance cameras outfitted on unmanned aerial vehicles and helmets. David Hambling of Wired magazine reported July 1 on research in the lab of Electrical Engineering Associate Professor Marc Christensen.

Christensen, chair of the Department of Electrical Engineering in SMU’s Bobby B. Lyle School of Engineering, has built a nationally recognized research group in photonics and computational imaging. His work with imaging sensors and micro-mirror arrays has been funded by the National Science Foundation and the Defense Advanced Research Projects Agency, DARPA, among others. In 2007 he received the DARPA Young Faculty Award.

Excerpt:

By David Hambling
Wired.com
Troops and unmanned aircraft could be the first to benefit from a new smart, ultra-slim camera technology which combines the images from many low-resolution sensors to create a high-resolution picture. Known as Panoptes, it promises lightweight, flat cameras with the power of a big lens in a device just five millimeters thick. It’s being developed by Professor Marc Christensen at Southern Methodist University, with funding from Darpa. Planned applications include sensors for miniature drones and helmet-cams for soldiers.

A key feature of the system is that it’s made up of a large number of tiny imagers. These are small, simple cameras, each directed independently by a MEMS-controlled micro-mirror. Because there is no large lens, Pantoptes can be made flat, unlike other cameras.

A central processor combines the images into a single picture, producing a higher resolution than the individual imagers. The intelligence is in the way that the system identifies areas of interest and concentrates the sub-imagers on the relevant part of the scene. Christensen gives the example of the Panoptes system looking at a building in a field.

“After a first frame or two was collected, the system could identify that certain areas, like the open field, had nothing of interest, whereas other areas, like the license plate of a car parked outside or peering in the windows, had details that were not sufficiently resolved,” he tells Danger Room. “In the next frame, subimagers that had been interrogating the field would be steered to aid in the imaging of the license plate and windows, thereby extracting the additional information.”

Read the full story.

Tags Lyle School of Engineering, Marc Christensen, Panoptes

Researcher news Technology

Defense News: Sharper image for military surveillance

Post author By Margaret Allen
Post date June 12, 2009

Southern Methodist University researchers are taking a different approach to producing photo and video images for military surveillance cameras outfitted on unmanned aerial vehicles and helmets. William Matthews of Defense News reported June 8 on research in the lab of Electrical Engineering Associate Professor Marc Christensen.

Excerpt:

By William Matthews
Defense News
When the U.S. military gets into a fight, it wants to see everything that’s going on, so it relies on a plethora of optical sensors.

Cameras on UAVs are increasingly numerous. So are cameras on vehicles and cameras on soldiers’ helmets. And cameras on satellites have been around for a long time.

But traditional cameras have a drawback. They’re bulky and relatively heavy.

Read the full story.

Tags Lyle School of Engineering, Marc Christensen

Technology

Icons of industry align with Texas universities to supercharge technology

Post author By Margaret Allen
Post date March 12, 2009

SMU is a partner in a newly designated National Science Foundation research consortium aimed at building both military and commercial superiority by making technology faster, better and smarter.

The Net-Centric Software and Systems Industry/University Cooperative Research Center, which also includes two other universities and 11 companies, will focus on improving how complicated information is gathered, shared and used, from the battlefield to the boardroom.

battlefield-afghanistan.ashx.jpeg

For example, FedEx’s package tracking system, which links employees, customers, suppliers and partners, is an example of a commercial application of net-centric technology. And on the battlefield, where information superiority already translates to combat power, future net-centric systems will connect ground and air combat, linking shooters, decision makers and sensors toward a common goal.

“This opens a lot of doors,” said Jeff Tian, associate professor of computer science in SMU’s Bobby B. Lyle School of Engineering. “We envision this consortium becoming a leading research alliance in the United States. Because we can cooperate with the expertise of academic institutions and high-tech companies, we have much greater research capabilities than any one institution working alone.”

Academic partners in the consortium are Southern Methodist University, the University of North Texas and the University of Texas at Dallas. The center’s industry partners are Boeing, Cisco, Codekko Software, EDS/HP, Fujitsu, GlobeRanger, Hall Financial Group, Lockheed-Martin Aero, Raytheon, Texas Instruments and T-System.

“Net-centric” describes a continuously evolving, complex community of people, devices, information and services interconnected by a communications network that can instantaneously measure and apply all available resources to a particular challenge. It is becoming increasingly important for the realization of important defense, commercial, healthcare, education, communication, social networking and entertainment applications.

The consortium is one of approximately 40 such centers nationwide that develop long-term partnerships between industry, academia and government. The National Science Foundation makes an initial investment in these centers, but each one is primarily supported by center members. Their focus is on research recommended by industrial advisory boards. — Kim Cobb

Tags Jeff Tian, Lyle School of Engineering