Princeton Docket # 10-2622
available commercial single-mode QC lasers either employ distributed feedback or
external cavity technique to achieve single-mode emission. Due to the complexity and yield issue of
these techniques, the costs and thus the sale prices for single-mode QC lasers
are very high, which is a crucial barrier to the development of
This invention permits single-mode operation
of QC lasers with folded Fabry-Perot cavities, which solves the problem that QC
lasers with conventional straight Fabry-Perot cavities generally do not operate
in single mode. It possesses the
advantages of simplicity in fabrication processes and lower cost over other
types of single-mode QC lasers.
quality monitoring, greenhouse gas monitoring
of explosive and hazardous material
cost of manufacturing
P. Q. Liu, X.
Wang, J. Fan, and C. Gmachl. ¿Single-Mode Quantum Cascade Lasers with a Folded
Fabry-Perot Cavity¿. Conference on Lasers and Electro-Optics/Quantum
Electronics and Laser Science Conference (CLEO/QELS),San Jose, CA. May 2010.
Higgins Professor of Electrical Engineering
of MIRTHE, is the
principle inventor for these QC
laser technologies. Her
is working on the development of new
quantum devices, especially lasers, and their optimization for sensor systems
and their applications in environment and health. Among the numerous
honors Professor Gmachl has received are Election to Austrian Academy of
Sciences as Corresponding Member Abroad (2008), MacArthur Fellow (2005), and
Popular Science Magazine's list of Brilliant 10
Patent protection is pending.