The Center for Quantum Devices in the News by    
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221.  
Aluminum-Free High-Power Diodes have Long Lifetimes
Aluminum-Free High-Power Diodes have Long Lifetimes
Laser Focus World - August 1, 1994
Scientist at Northwestern University have fabricated high-power laser diodes based on InGaAsP lattice-matched to GaAs substrates. The devices have power outputs of 750 mW in quasi-continuous more, and 650 mW in continuous mode (per facet). Razehi says that these devices have suffered no observable degradation after more than 3000 house of operation in the quasi-continuous regime. ... [read more]
 
222.  
Indium Makes More Durable Semiconductor Laser
Indium Makes More Durable Semiconductor Laser
Inside R&D - July 6, 1994
A strong case has been made for replacing aluminum-based semiconductor lasers with a new indium-based type that researchers at Northwestern University have been working on. In fact, the durability of the new semiconductor diodes is enough better than those in present high-power lasers that we could see new applications. ... [read more]
 
223.  
ARPA Seeks Cheaper, Better Laser Weapons
ARPA Seeks Cheaper, Better Laser Weapons
Laser Focus World - July 1, 1994
ARPA sponsored research at Northwestern University is focusing on technology for aluminum-free diodes emitting at 808 nm for use in pumping Nd:YAG lasers. This research seeks to demonstrate the use of a MOPCVD process to produce lasers diodes of InGaAsP as a replacement for diodes based on AlGaAs. ... [read more]
 
224.  
Quantum Force
Quantum Force
Northwestern Perspective - June 1, 1994
Students crowd into the office on the fourth floor of the Materials and Life Sciences Building. Seated at a table, Professor Manijeh Razeghi faces two renowned physicist from Poland. Three graduate students sitting beside her take notes as fast as they can. One student passes the visitors a three-dimensional drawing of something that looks like a multilayered pastry ... [read more]
 
225.  
High Powered Laser on a Chip
High Powered Laser on a Chip
Northwestern Perspective - March 1, 1994
Northwestern researchers have discovers a way to make high-powered lasers on a computer chip, which "should lead to a whole new generation of comercial high-powered lasers that will be reliable, long-lasting, and prescise," says Manijeh Razeghi, Walter P. Murphy Professor of Electrical Engineering and Computer Science. ... [read more]
 
226.  
Discovery viewed as breakthrough in miniature lasers
Discovery viewed as breakthrough in miniature lasers
The Huntsville Times - November 29, 1993
Northwestern University researchers say they have discovers a way to make high-powered lasers on a computer chip, a breakthrough that should lead to a new generation of miniature lasers. Previously, the only method for producing the lasers on a chip had involved the use of AlGaAs, But the use of aluminum content led to defects in the original construction and sudden failures in operation. ... [read more]
 
227.  
NU Researchers on power trip over laser findings
NU Researchers on power trip over laser findings
The Daily Northwestern - November 19, 1993
Miniature lasers could be shooting throguh laboratories everywhere due to Northwestern researchers' discoveries of new methods of producing the high powered beams. Manijeh Razeghi, Professor of electrical engineering and computer science, announced the finding Wednesday at the anual meeting of the Lasers and Electro-Optic Society in San Jose, Ca. ... [read more]
 
228.  
High Powered Laser on a Chip
High Powered Laser on a Chip
Inside R&D - October 8, 1993
Researchers at Northwestern University have discovered a way to make high-powered aluminum free lasers on a computer chip. Test on bench versions of he new lasers show them to be more reliable and stable than the best results ever reported for the aluminum-based chips. The lasers should also be simple to produce, easy to operate, and provide a high power density. ... [read more]
 
229.  
New Optoelectronics Chip Built at Northwestern
New Optoelectronics Chip Built at Northwestern
McCormick Dimension - September 1, 1993
Researchers at Northwestern University have succeeded in building what are believed to be the most precise and long-lasting lasers ever constructed on a silicon base. The achievement is an important step toward the marriage of electronics and photonics on a single chip. ... [read more]
 
230.  
Next Generation Laser Diodes: Aluminum Free
Next Generation Laser Diodes: Aluminum Free
Optics & Photonics News - September 1, 1993
If research at Northwestern University is successful, aluminum-free laser diodes may be on the shelves in the next several years. Manijeh Razeghi, director of Northwestern's Center for Quantum Devices, leads a team investigating InGaAsP/InGaP/GaAs doubble heterostructure laser diodes grown using metalorganic chemical vapor deposition (MOCVD) ... [read more]
 

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