Title :
Doubly Modulated Interferometry For Trace Gas Detection
Author :
Hughes, Steven M. ; Anderson, Dana Z.
Author_Institution :
Univ. of Colorado, Denver
Abstract :
A double modulation scheme enhances low-frequency trace-gas-induced path-length changes in a miniature (2 cm3) adaptive interferometer. Path-length sensitivity is 0.2 pm/radicHz while ethanol vapor sensitivity is 2 ppm/radicHz.
Keywords :
gas sensors; holographic interferometry; double modulation scheme; doubly modulated interferometry; low-frequency trace-gas-induced path-length changes; miniature adaptive interferometer; trace gas detection; Chemical transducers; Frequency; Holographic optical components; Holography; Optical filters; Optical interferometry; Optical modulation; Optical noise; Optical polymers; Phase modulation;
Conference_Titel :
Lasers and Electro-Optics, 2007. CLEO 2007. Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-55752-834-6
DOI :
10.1109/CLEO.2007.4452627
