Abstract

A novel technique for coherent anti-Stokes Raman spectroscopy (CARS) measurements in multiple points is presented. With a system of cylindrical lenses, each laser beam is split into several focused beams, yielding separate planar boxcars configurations. Spectrally resolved CARS signals are detected at different heights on the CCD chip. With dual-broadband rotational CARS the setup is demonstrated for quantitative measurements of temperature- and oxygen-concentration profiles. The technique was demonstrated for three points only, but it can be extended to more points by use of special optics; this choice must be based on a sufficient signal-to-noise ratio in all points for the actual measurement condition.

© 2000 Optical Society of America

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References

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  1. A. C. Eckbreth, Laser Diagnostics for Combustion Temperature and Species (Gordon & Breach, Amsterdam, 1996).
  2. D. A. Greenhalgh, in Advances in Non-linear Spectroscopy, R. J. H. Clark and R. E. Hester (Wiley, New York, 1988), p. 193.
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    [CrossRef] [PubMed]
  4. J. H. Stufflebeam and A. C. Eckbreth, in Non-intrusive Combustion Diagnostics, K. K. Kuo and T. P. Parr, eds. (Begell House, New York, 1994), p. 516.
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef] [PubMed]
  11. L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).
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    [CrossRef]
  13. J. Bood, “Development of dual-broadband rotational CARS for combustion diagnostics,” Ph.D. dissertation (Lund Institute of Technology, Lund, Sweden).

1997 (1)

1996 (2)

1993 (1)

L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).

1989 (1)

1986 (2)

1983 (1)

1979 (1)

Aldén, M.

L. Martinsson, P.-E. Bengtsson, and M. Aldén, Appl. Phys. B 62, 29 (1996).
[CrossRef]

L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).

M. Aldén, P.-E. Bengtsson, and H. Edner, Appl. Opt. 25, 4493 (1986).
[CrossRef]

Anderson, T. J.

Bengtsson, P.-E.

L. Martinsson, P.-E. Bengtsson, and M. Aldén, Appl. Phys. B 62, 29 (1996).
[CrossRef]

L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).

M. Aldén, P.-E. Bengtsson, and H. Edner, Appl. Opt. 25, 4493 (1986).
[CrossRef]

Bonamy, J.

L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).

Bood, J.

J. Bood, “Development of dual-broadband rotational CARS for combustion diagnostics,” Ph.D. dissertation (Lund Institute of Technology, Lund, Sweden).

Chang, R. K.

Eckbreth, A. C.

A. C. Eckbreth and T. J. Anderson, Opt. Lett. 11, 496 (1986).
[CrossRef] [PubMed]

D. V. Murphy, M. B. Long, R. K. Chang, and A. C. Eckbreth, Opt. Lett. 4, 167 (1979).
[CrossRef] [PubMed]

J. H. Stufflebeam and A. C. Eckbreth, in Non-intrusive Combustion Diagnostics, K. K. Kuo and T. P. Parr, eds. (Begell House, New York, 1994), p. 516.

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

Edner, H.

Greenhalgh, D. A.

D. A. Greenhalgh, in Advances in Non-linear Spectroscopy, R. J. H. Clark and R. E. Hester (Wiley, New York, 1988), p. 193.

Jonuscheit, J.

Kröll, S.

L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).

Kurtz, A.

Leipertz, A.

Long, M. B.

Martinsson, L.

L. Martinsson, P.-E. Bengtsson, and M. Aldén, Appl. Phys. B 62, 29 (1996).
[CrossRef]

L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).

Murphy, D. V.

Schenk, M.

Seeger, T.

Snow, J. B.

Stufflebeam, J. H.

J. H. Stufflebeam and A. C. Eckbreth, in Non-intrusive Combustion Diagnostics, K. K. Kuo and T. P. Parr, eds. (Begell House, New York, 1994), p. 516.

Thumann, A.

Zheng, J.-B.

Appl. Opt. (3)

Appl. Phys. B (1)

L. Martinsson, P.-E. Bengtsson, and M. Aldén, Appl. Phys. B 62, 29 (1996).
[CrossRef]

J. Chem. Phys. (1)

L. Martinsson, P.-E. Bengtsson, M. Aldén, S. Kröll, and J. Bonamy, J. Chem. Phys. 9, 2466 (1993).

Opt. Lett. (4)

Other (4)

J. Bood, “Development of dual-broadband rotational CARS for combustion diagnostics,” Ph.D. dissertation (Lund Institute of Technology, Lund, Sweden).

J. H. Stufflebeam and A. C. Eckbreth, in Non-intrusive Combustion Diagnostics, K. K. Kuo and T. P. Parr, eds. (Begell House, New York, 1994), p. 516.

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

D. A. Greenhalgh, in Advances in Non-linear Spectroscopy, R. J. H. Clark and R. E. Hester (Wiley, New York, 1988), p. 193.

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Figures (3)

Fig. 1
Fig. 1

Schematic optical arrangement for focusing of the laser beams, providing three spatially separated rotational CARS signals shown in top and side views. Note that for clarity the beam height in the side view has been enlarged in comparison with that in the top view.

Fig. 2
Fig. 2

(a) Simultaneously recorded rotational CARS spectra at three different heights h above a heated plate. (b) Experimental spectra simultaneously recorded in an oxygen jet at three different radial distances r from the center of the jet stream. A residual curve corresponding to the difference between the experimental and the best-fitted theoretical spectrum is also illustrated for each spectrum.

Fig. 3
Fig. 3

Evaluated (a) temperatures and (b) oxygen concentrations corresponding to the spectra shown in Fig. 2.

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