a new development from Northwestern university's Manijeh
Razeghi might be another device for protective our borders.
Supported via the department of homeland safety, Razeghi's
lab has created a new, wide-band tunable infrared laser that has implications
for the detection of medication and explosives.
The strong, all solid-state laser can be rapidly tuned to
emit in the wavelength range that encompasses the critical
"fingerprint" vicinity where maximum molecular functions are absorbed
and recognized via infrared sensing. In experiments, the laser has demonstrated
its capability to capture the specific spectral fingerprint of gases.
"The only transferring part in the whole device is the
fan used to maintain the laser cool," said Manijeh Razeghi, Walter P.
Murphy Professor of electrical Engineering and laptop technological know-how in
Northwestern's McCormick college of Engineering. "that is a major
advantage over current structures that require mechanical components to obtain
tuning, and we expect to illustrate remarkable balance."
The preliminary, patent-pending consequences were published
inside the June 8 difficulty of scientific reports. The research and
improvement of the laser device is the end result of greater than 18 years of
quantum cascade laser development work at Northwestern's middle for Quantum
devices.
The laser has been included into a gadget that carries all
of the laser driving force electronics and tuning software program vital for
integration into a spectroscopy gadget. It produces a strong,
unmarried-aperture spot much less than 3 millimeters in diameter this is
suitable for standoff detection and is capable of linear or random get entry to
scanning with stabilization times of less than 1 millisecond according to
wavelength.
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