Title :
Terahertz Interferometer That Senses Vibrations Behind Barriers
Author :
Chen, Jerry C. ; Kaushik, Sumanth
Author_Institution :
Lincoln Lab., MIT, Lexington, MA
fDate :
4/1/2007 12:00:00 AM
Abstract :
A terahertz sensor that measures vibrations behind optically opaque barriers (cardboard, plastic, wool, cotton) is described and demonstrated. Using interferometric techniques, submicrometer displacements can be resolved. Measured spectral response agrees with commercial vibrometer
Keywords :
infrared detectors; infrared imaging; light interferometers; submillimetre wave detectors; vibration measurement; infrared imaging; infrared measurements; interferometric techniques; optical opaque barriers; spectral response; submicrometer displacements; terahertz interferometer; vibration measurement; vibration sensing; Frequency; Infrared sensors; Optical interferometry; Optical sensors; Plastics; Quantum cascade lasers; Sensor phenomena and characterization; Submillimeter wave measurements; Velocity measurement; Vibration measurement; Infrared imaging; infrared measurements; optical interferometry; optical velocity measurement; vibration measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.893583
