Title :
Time-wavelength spectroscopy for chemical sensing
Author :
Chou, Jason ; Han, Yan ; Jalali, Bahram
Author_Institution :
Optoelectronic Circuits & Syst. Lab., Univ. of California Los Angeles, CA, USA
fDate :
4/1/2004 12:00:00 AM
Abstract :
Time-wavelength spectroscopy, using a linearly chirped broad-band pulse, eliminates the need for an optical spectrometer and enables real-time analysis. Utilizing digital filtering and matched detection, we demonstrate identification of gas signatures that are entirely masked by highly nonuniform source spectra.
Keywords :
chirp modulation; digital filters; gas sensors; infrared spectroscopy; matched filters; optical pulse generation; signal processing; time-domain analysis; chemical sensing; digital filtering; gas signatures; linearly chirped broad-band pulse; matched detection; real-time analysis; time-wavelength spectroscopy; Absorption; Chemicals; Optical distortion; Optical filters; Optical noise; Optical sensors; Optical signal processing; Radio frequency; Spectroscopy; Time domain analysis;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.824997
