Abstract

We present a novel diode-laser diagnostic for water-vapor measurements based on absorption spectroscopy. Two InGaAsP diode lasers were used to record H2O absorption line shapes near 1395 nm at a 3-kHz repetition rate along a single path through a water-vapor flow field generated in a shock tube. The use of two lasers permits simultaneous line-shape measurements in different spectral regions and facilitates the selection of appropriate line pairs for thermometry. The wavelength tuning rate was determined by use of a fiber-optic device known as a ring interferometer. Flow-field conditions (1320 K, 0.3 atm) inferred from measured line shapes compared favorably with calculated values.

© 1994 Optical Society of America

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  1. E. C. Rea, R. K. Hanson, Appl. Opt. 27, 4454 (1988).
    [CrossRef] [PubMed]
  2. A. Y. Chang, M. D. DiRosa, D. F. Davidson, R. K. Hanson, Appl Opt. 30, 3011 (1991).
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
  12. L. S. Rothmann, J. Quant. Spectrosc. Radiat. Transfer 48, 469 (1992).
    [CrossRef]

1994 (2)

M. P. Arroyo, S. Langlois, R. K. Hanson, Appl. Opt. 33, 3296 (1994).
[CrossRef] [PubMed]

S. Langlois, T. P. Birbeck, R. K Hanson, J. Mol. Spectrosc. 163, 27 (1994).
[CrossRef]

1993 (2)

1992 (2)

N. Goldstein, S. Adler-Golden, J. Lee, F. Bien, Appl. Opt. 31, 3409 (1992).
[CrossRef] [PubMed]

L. S. Rothmann, J. Quant. Spectrosc. Radiat. Transfer 48, 469 (1992).
[CrossRef]

1991 (1)

A. Y. Chang, M. D. DiRosa, D. F. Davidson, R. K. Hanson, Appl Opt. 30, 3011 (1991).
[CrossRef] [PubMed]

1990 (1)

C. B. Carlisle, D. E. Cooper, Appl. Phys. Lett. 56, 805 (1990).
[CrossRef]

1988 (1)

1986 (1)

S. Tai, K. Kyuma, K. Hamanaka, T. Nakayama, Opt. Acta 33, 1539 (1986).
[CrossRef]

1982 (1)

Adler-Golden, S.

Arroyo, M. P.

Bien, F.

Birbeck, T. P.

S. Langlois, T. P. Birbeck, R. K Hanson, J. Mol. Spectrosc. 163, 27 (1994).
[CrossRef]

Carlisle, C. B.

C. B. Carlisle, D. E. Cooper, Appl. Phys. Lett. 56, 805 (1990).
[CrossRef]

Chang, A. Y.

A. Y. Chang, M. D. DiRosa, D. F. Davidson, R. K. Hanson, Appl Opt. 30, 3011 (1991).
[CrossRef] [PubMed]

Chodorow, M.

Cooper, D. E.

C. B. Carlisle, D. E. Cooper, Appl. Phys. Lett. 56, 805 (1990).
[CrossRef]

Davidson, D. F.

A. Y. Chang, M. D. DiRosa, D. F. Davidson, R. K. Hanson, Appl Opt. 30, 3011 (1991).
[CrossRef] [PubMed]

DiRosa, M. D.

A. Y. Chang, M. D. DiRosa, D. F. Davidson, R. K. Hanson, Appl Opt. 30, 3011 (1991).
[CrossRef] [PubMed]

Goldstein, N.

Hamanaka, K.

S. Tai, K. Kyuma, K. Hamanaka, T. Nakayama, Opt. Acta 33, 1539 (1986).
[CrossRef]

Hanson, R. K

S. Langlois, T. P. Birbeck, R. K Hanson, J. Mol. Spectrosc. 163, 27 (1994).
[CrossRef]

Hanson, R. K.

Kyuma, K.

S. Tai, K. Kyuma, K. Hamanaka, T. Nakayama, Opt. Acta 33, 1539 (1986).
[CrossRef]

Langlois, S.

S. Langlois, T. P. Birbeck, R. K Hanson, J. Mol. Spectrosc. 163, 27 (1994).
[CrossRef]

M. P. Arroyo, S. Langlois, R. K. Hanson, Appl. Opt. 33, 3296 (1994).
[CrossRef] [PubMed]

Lee, J.

Nakayama, T.

S. Tai, K. Kyuma, K. Hamanaka, T. Nakayama, Opt. Acta 33, 1539 (1986).
[CrossRef]

Philippe, L. C.

Rea, E. C.

Rothmann, L. S.

L. S. Rothmann, J. Quant. Spectrosc. Radiat. Transfer 48, 469 (1992).
[CrossRef]

Shaw, H. J.

Stokes, L. F.

Tai, S.

S. Tai, K. Kyuma, K. Hamanaka, T. Nakayama, Opt. Acta 33, 1539 (1986).
[CrossRef]

Toth, R. A.

R. A. Toth, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, Calif. 91109 (personal communication, 1992).

Appl Opt. (1)

A. Y. Chang, M. D. DiRosa, D. F. Davidson, R. K. Hanson, Appl Opt. 30, 3011 (1991).
[CrossRef] [PubMed]

Appl. Opt. (5)

Appl. Phys. Lett. (1)

C. B. Carlisle, D. E. Cooper, Appl. Phys. Lett. 56, 805 (1990).
[CrossRef]

J. Mol. Spectrosc. (1)

S. Langlois, T. P. Birbeck, R. K Hanson, J. Mol. Spectrosc. 163, 27 (1994).
[CrossRef]

J. Quant. Spectrosc. Radiat. Transfer (1)

L. S. Rothmann, J. Quant. Spectrosc. Radiat. Transfer 48, 469 (1992).
[CrossRef]

Opt. Acta (1)

S. Tai, K. Kyuma, K. Hamanaka, T. Nakayama, Opt. Acta 33, 1539 (1986).
[CrossRef]

Opt. Lett. (1)

Other (1)

R. A. Toth, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, Calif. 91109 (personal communication, 1992).

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Figures (4)

Fig. 1
Fig. 1

Schematic of the experimental setup.

Fig. 2
Fig. 2

Absorption traces recorded in a water-vapor flow field. The temperature and pressure in the probed region were 1293 K and 0.311 atm, respectively.

Fig. 3
Fig. 3

Polynomial fits (solid curve) of the ring-interferometer transmission peak positions (dots) from the data presented in Fig. 2.

Fig. 4
Fig. 4

Comparison of the measured absorbance (solid curve) and best fit (dots) obtained from the traces in Fig. 2. The lower signal-to-noise ratio in the spectral features on the right is due to the lower new power from laser 2.

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