Title :
Perspective of remote optical measurement techniques (ROMTs)
Author :
Gregorio, Eduard ; Rocadenbosch, Francesc
Author_Institution :
Univ. Polytech. de Catalunya, Barcelona
Abstract :
This article presents an intercomparison between four different ROMTs: differential optical absorption spectroscopy (DOAS), differential absorption LIDAR (DIAL), Fourier transform infrared spectroscopy (FTIR), and tunable diode laser absorption spectroscopy (TDLAS). The main focus is on the TDLAS technique, where the main laser-diode typologies and modulation schemes, namely, wavelength modulation spectroscopy (WMS) and frequency modulation spectroscopy (FMS), are reviewed. At present, new promising modulation schemes with range resolution capability are being investigated. Among them, analog frequency modulation (FM) and digital pseudo-random schemes are discussed.
Keywords :
Fourier transform spectroscopy; atmospheric composition; atmospheric techniques; infrared spectroscopy; remote sensing; semiconductor lasers; spectrochemical analysis; ultraviolet spectroscopy; visible spectroscopy; DIAL; DOAS; FMS; FTIR; Fourier transform infrared spectroscopy; ROMT intercomparison; TDLAS; WMS; analog frequency modulation; differential absorption LIDAR; differential optical absorption spectroscopy; digital pseudorandom schemes; frequency modulation spectroscopy; remote optical measurement techniques; tunable diode laser absorption spectroscopy; wavelength modulation spectroscopy; Diode lasers; Electromagnetic wave absorption; Fourier transforms; Frequency modulation; Infrared spectra; Laser radar; Measurement techniques; Optical modulation; Spectroscopy; Tunable circuits and devices;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-1211-2
Electronic_ISBN :
978-1-4244-1212-9
DOI :
10.1109/IGARSS.2007.4423464
