Abstract

A nonresonant cavity ringdown diagnostic to measure light attenuation from atmospheric particulate matter at 532- and 355-nm wavelengths is described. The presence of atmospheric particulate is clearly detectable with this technique, as demonstrated by experimental results. The extinction cross section is higher at 355 than at 532  nm, although we were able to purchase significantly higher-reflectivity optics at 532  nm. The expected advantage at 355  nm is thus lost. This new technique is compared with a commercially available instrument, and sensitivity limitations are discussed.

© 1998 Optical Society of America

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References

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  1. J. J. Scherer, J. B. Paul, A. O’Keefe, and R. J. Saykally, Chem. Rev. 97, 25 (1997).
    [CrossRef] [PubMed]
  2. J. B. Paul and R. J. Saykally, Anal. Chem. 69, 287A (1997).
    [CrossRef]
  3. J. B. Paul, J. J. Scherer, A. O’Keefe, and R. J. Saykally, Laser Focus World 33(3), 71 (1997).
  4. J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).
  5. D. Romanini, A. A. Kachanov, and F. Stoeckel, Chem. Phys. Lett. 270, 546 (1997).
    [CrossRef]
  6. A. C. Eckbreth, Laser Diagnostics for Combustion Temperature and Species, 2nd ed. (Gordon & Breach, Amsterdam, 1996).

1997 (4)

J. J. Scherer, J. B. Paul, A. O’Keefe, and R. J. Saykally, Chem. Rev. 97, 25 (1997).
[CrossRef] [PubMed]

J. B. Paul and R. J. Saykally, Anal. Chem. 69, 287A (1997).
[CrossRef]

J. B. Paul, J. J. Scherer, A. O’Keefe, and R. J. Saykally, Laser Focus World 33(3), 71 (1997).

D. Romanini, A. A. Kachanov, and F. Stoeckel, Chem. Phys. Lett. 270, 546 (1997).
[CrossRef]

1996 (1)

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Collier, C. P.

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Eckbreth, A. C.

A. C. Eckbreth, Laser Diagnostics for Combustion Temperature and Species, 2nd ed. (Gordon & Breach, Amsterdam, 1996).

Kachanov, A. A.

D. Romanini, A. A. Kachanov, and F. Stoeckel, Chem. Phys. Lett. 270, 546 (1997).
[CrossRef]

O’Keefe, A.

J. B. Paul, J. J. Scherer, A. O’Keefe, and R. J. Saykally, Laser Focus World 33(3), 71 (1997).

J. J. Scherer, J. B. Paul, A. O’Keefe, and R. J. Saykally, Chem. Rev. 97, 25 (1997).
[CrossRef] [PubMed]

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Paul, J. B.

J. J. Scherer, J. B. Paul, A. O’Keefe, and R. J. Saykally, Chem. Rev. 97, 25 (1997).
[CrossRef] [PubMed]

J. B. Paul and R. J. Saykally, Anal. Chem. 69, 287A (1997).
[CrossRef]

J. B. Paul, J. J. Scherer, A. O’Keefe, and R. J. Saykally, Laser Focus World 33(3), 71 (1997).

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Rakestraw, D. J.

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Romanini, D.

D. Romanini, A. A. Kachanov, and F. Stoeckel, Chem. Phys. Lett. 270, 546 (1997).
[CrossRef]

Saykally, R. J.

J. B. Paul, J. J. Scherer, A. O’Keefe, and R. J. Saykally, Laser Focus World 33(3), 71 (1997).

J. B. Paul and R. J. Saykally, Anal. Chem. 69, 287A (1997).
[CrossRef]

J. J. Scherer, J. B. Paul, A. O’Keefe, and R. J. Saykally, Chem. Rev. 97, 25 (1997).
[CrossRef] [PubMed]

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Scherer, J. J.

J. J. Scherer, J. B. Paul, A. O’Keefe, and R. J. Saykally, Chem. Rev. 97, 25 (1997).
[CrossRef] [PubMed]

J. B. Paul, J. J. Scherer, A. O’Keefe, and R. J. Saykally, Laser Focus World 33(3), 71 (1997).

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Stoeckel, F.

D. Romanini, A. A. Kachanov, and F. Stoeckel, Chem. Phys. Lett. 270, 546 (1997).
[CrossRef]

Anal. Chem. (1)

J. B. Paul and R. J. Saykally, Anal. Chem. 69, 287A (1997).
[CrossRef]

Chem. Phys. Lett. (1)

D. Romanini, A. A. Kachanov, and F. Stoeckel, Chem. Phys. Lett. 270, 546 (1997).
[CrossRef]

Chem. Rev. (1)

J. J. Scherer, J. B. Paul, A. O’Keefe, and R. J. Saykally, Chem. Rev. 97, 25 (1997).
[CrossRef] [PubMed]

Laser Focus World (1)

J. B. Paul, J. J. Scherer, A. O’Keefe, and R. J. Saykally, Laser Focus World 33(3), 71 (1997).

Spectroscopy (1)

J. J. Scherer, J. B. Paul, C. P. Collier, A. O’Keefe, D. J. Rakestraw, and R. J. Saykally, Spectroscopy 11, 46 (1996).

Other (1)

A. C. Eckbreth, Laser Diagnostics for Combustion Temperature and Species, 2nd ed. (Gordon & Breach, Amsterdam, 1996).

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Figures (2)

Fig. 1
Fig. 1

Experimental CRDS decay at 532  nm. Higher-order spatial modes decay rapidly (times <2030 µs), followed by a single-exponential decay.

Fig. 2
Fig. 2

Natural logarithm of the normalized decay data. Decay constant τ107.6 µs.

Tables (1)

Tables Icon

Table 1 Measured Values of τ (μs) for Different Purge Conditions

Equations (2)

Equations on this page are rendered with MathJax. Learn more.

τ=L/cln R+σMieNLparticles+σRayleighNLscatteringmolecules+σabsNLabsorbers+.
σRλ=8π/3π2n2-12/N2λ4.

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