Continuous-wave cavity ringdown spectroscopy based on the control of cavity reflection.

A new type of continuous-wave cavity ringdown spectrometer based on the control of cavity reflection for trace gas detection was designed and evaluated. The technique separated the acquisitions of the ringdown event and the trigger signal to optical switch by detecting the cavity reflection and transmission, respectively. A detailed description of the time sequence of the measurement process was presented. In order to avoid the wrong extraction of ringdown time encountered accidentally in fitting procedure, the laser frequency and cavity length were scanned synchronously. Based on the statistical analysis of measured ringdown times, the frequency normalized minimum detectable absorption in the reflection control mode was 1.7 × 10(-9)cm(-1)Hz(-1/2), which was 5.4 times smaller than that in the transmission control mode. However the signal-to-noise ratio of the absorption spectrum was only 3 times improved since the etalon effect existed. Finally, the peak absorption coefficients of the C(2)H(2) transition near 1530.9nm under different pressures showed a good agreement with the theoretical values.

[1]  David A. Long,et al.  Frequency-stabilized cavity ring-down spectroscopy , 2010 .

[2]  Benno Willke,et al.  Dynamic response of a Fabry–Perot interferometer , 1999 .

[3]  D. Z. Anderson,et al.  Mirror reflectometer based on optical cavity decay time. , 1984, Applied optics.

[4]  J. B. Paul,et al.  INFRARED CAVITY RINGDOWN LASER ABSORPTION SPECTROSCOPY , 1998 .

[5]  Anthony O'Keefe,et al.  Cavity-enhanced quantum-cascade laser-based instrument for carbon monoxide measurements. , 2005, Applied optics.

[6]  Kevin K. Lehmann,et al.  Single-cell detection by cavity ring-down spectroscopy , 2004 .

[7]  B. Bussery-Honvault,et al.  Very high sensitivity CW-cavity ring down spectroscopy: Application to the a1Δg(0)–X3Σg-(1) O2 band near 1.58 μm , 2005 .

[8]  A. O’Keefe,et al.  Cavity ring‐down optical spectrometer for absorption measurements using pulsed laser sources , 1988 .

[9]  D. Romanini,et al.  CW cavity ring down spectroscopy , 1997 .

[10]  R. Hanson,et al.  Multiplexed continuous-wave diode-laser cavity ringdown measurements of multiple species. , 2000, Applied optics.

[11]  Paul Rabinowitz,et al.  Trace moisture detection using continuous-wave cavity ring-down spectroscopy. , 2003, Analytical chemistry.

[12]  F. Capasso,et al.  Cavity ringdown spectroscopic detection of nitric oxide with a continuous-wave quantum-cascade laser. , 2001, Applied optics.

[13]  Richard N. Zare,et al.  Cavity ring-down spectroscopy for quantitative absorption measurements , 1995 .

[14]  D. Romanini,et al.  High-speed cavity ringdown spectroscopy with increased spectral resolution by simultaneous laser and cavity tuning. , 2005, Optics express.

[15]  J. Hodges,et al.  Frequency-stabilized single-mode cavity ring-down apparatus for high-resolution absorption spectroscopy , 2004 .

[16]  Yabai He,et al.  Rapidly swept continuous-wave cavity-ringdown spectroscopy , 2011 .

[17]  D. Spencer,et al.  Sensitive measurement of photon lifetime and true reflectances in an optical cavity by a phase-shift method. , 1980, Applied optics.

[18]  S. Mikhailenko,et al.  High sensitivity CW-cavity ring down spectroscopy of water in the region of the 1.5 μm atmospheric window , 2004 .

[19]  Roderic L Jones,et al.  A compact broadband cavity enhanced absorption spectrometer for detection of atmospheric NO(2) using light emitting diodes. , 2006, The Analyst.

[20]  Daniele Romanini,et al.  Diode laser cavity ring down spectroscopy , 1997 .

[21]  M. E. Calzada,et al.  Frequency domain analysis for laser-locked cavity ringdown spectroscopy. , 2011, Optics express.

[22]  Kevin K. Lehmann,et al.  Ring-down cavity absorption spectroscopy of the very weak HCN overtone bands with six, seven, and eight stretching quanta , 1993 .

[23]  J. H. Miller,et al.  Development of a cw-laser-based cavity-ringdown sensor aboard a spacecraft for trace air constituents , 2002, Applied physics. B, Lasers and optics.

[24]  J. B. Paul,et al.  INFRARED CAVITY RINGDOWN LASER ABSORPTION SPECTROSCOPY (IR-CRLAS) OF JET-COOLED WATER CLUSTERS , 1995 .