Chemical recognition of gases and gas mixtures with terahertz waves

被引：196

作者：

Jacobsen, RH

Mittleman, DM

Nuss, MC

机构：

[1] Bell Labs., Lucent Technologies, Holmdel, NJ 07733

[2] Department of Chemistry, Aarhus University, DK-8000 Aarhus C

[3] Dept. of Elec. and Comp. Engineering, Rice University, Houston, TX 77251-1892

来源：

OPTICS LETTERS | 1996年 / 21卷 / 24期

关键词：

D O I：

10.1364/OL.21.002011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A time-domain chemical-recognition system for classifying gases and analyzing gas mixtures is presented. We analyze the free induction decay exhibited by gases excited by far-infrared (terahertz) pulses in the time domain, using digital signal-processing techniques. A simple geometric picture is used for the classification of the waveforms measured for unknown gas species. We demonstrate how the recognition system can be used to determine the partial pressures of an ammonia-water gas mixture. (C) 1996 Optical Society of America.

引用

页码：2011 / 2013

页数：3

共 11 条

[1] Terahertz emission from electric field singularities in biased semiconductors
Brener, I
Dykaar, D
Frommer, A
Pfeiffer, LN
Lopata, J
Wynn, J
West, K
Nuss, MC
[J]. OPTICS LETTERS, 1996, 21 (23) : 1924 - 1926
[2] OPTICAL FREE INDUCTION DECAY
BREWER, RG
SHOEMAKER, RL
[J]. PHYSICAL REVIEW A-GENERAL PHYSICS, 1972, 6 (06): : 2001 - +
[3] FAR-INFRARED TERAHERTZ TIME-DOMAIN SPECTROSCOPY OF FLAMES
CHEVILLE, RA
GRISCHKOWSKY, D
[J]. OPTICS LETTERS, 1995, 20 (15) : 1646 - 1648
[4] THZ COMMENSURATE ECHOES - PERIODIC REPHASING OF MOLECULAR-TRANSITIONS IN FREE-INDUCTION DECAY
HARDE, H
KEIDING, S
GRISCHKOWSKY, D
[J]. PHYSICAL REVIEW LETTERS, 1991, 66 (14) : 1834 - 1837
[5] LINEAR PREDICTION - TUTORIAL REVIEW
MAKHOUL, J
[J]. PROCEEDINGS OF THE IEEE, 1975, 63 (04) : 561 - 580
[6] Pickett H. M., SUBMILLIMETER MILLIM
[7] Proakis J.G., 2006, Digital Signal Processing: Principles, Algorithms, and Applications
[8] RABINER Lawrence, 1993, FUNDAMENTALS SPEECH, p[97, 125]
[9] SUBPICOSECOND PHOTOCONDUCTING DIPOLE ANTENNAS
SMITH, PR
AUSTON, DH
NUSS, MC
[J]. IEEE JOURNAL OF QUANTUM ELECTRONICS, 1988, 24 (02) : 255 - 260
[10] TERAHERTZ TIME-DOMAIN SPECTROSCOPY OF WATER-VAPOR
VANEXTER, M
FATTINGER, C
GRISCHKOWSKY, D
[J]. OPTICS LETTERS, 1989, 14 (20) : 1128 - 1130

← 1 2 →