Abstract

An external optical cavity pulse stretcher for nanosecond-long laser pulses has been applied to coherent anti-Stokes Raman spectroscopy (CARS). An increased signal-to-noise ratio was achieved for both vibrational and pure rotational CARS, while the power density of the laser beams remained constant. Moreover, it was demonstrated that the use of the pulse stretcher also leads to improved precision of the determined temperatures and concentrations as a result of repeated excitation of the dye laser.

© 2004 Optical Society of America

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References

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2004 (1)

2002 (1)

2000 (1)

T. X. Phuoc, Opt. Commun. 175, 419 (2000).
[CrossRef]

1996 (2)

A. Sircar, R. K. Dwivedi, and R. K. Thareja, Appl. Phys. B 63, 623 (1996).

Q. V. Nguyen, R. W. Dibble, C. D. Carter, G. J. Fiechtner, and R. S. Barlow, Combust. Flame 105, 499 (1996).
[CrossRef]

1994 (1)

1986 (3)

1985 (1)

Aldén, M.

Anderson, T. J.

Barlow, R. S.

Q. V. Nguyen, R. W. Dibble, C. D. Carter, G. J. Fiechtner, and R. S. Barlow, Combust. Flame 105, 499 (1996).
[CrossRef]

Beiting, E. J.

Bengtson, P. E.

Beyrau, F.

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, Opt. Lett. 29, 247 (2004).
[CrossRef] [PubMed]

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, “Determination of the gas-phase temperature in the vaporizing spray of a GDI-injector using pure rotational CARS,” SAE paper 2004-01-1350 (Society of Automotive Engineers, Warrendale, Pa., 2004).

Bräuer, A.

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, Opt. Lett. 29, 247 (2004).
[CrossRef] [PubMed]

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, “Determination of the gas-phase temperature in the vaporizing spray of a GDI-injector using pure rotational CARS,” SAE paper 2004-01-1350 (Society of Automotive Engineers, Warrendale, Pa., 2004).

Carter, C. D.

Q. V. Nguyen, R. W. Dibble, C. D. Carter, G. J. Fiechtner, and R. S. Barlow, Combust. Flame 105, 499 (1996).
[CrossRef]

D’Alfonso, N.

F. Rabenstein, J. Egermann, A. Leipertz, and N. D’Alfonso, “Vapor-phase structures of Diesel-type fuel sprays: an experimental analysis,” SAE paper 982543 (Society of Automotive Engineers, Warrendale, Pa., 1998).

Dibble, R. W.

Q. V. Nguyen, R. W. Dibble, C. D. Carter, G. J. Fiechtner, and R. S. Barlow, Combust. Flame 105, 499 (1996).
[CrossRef]

Dwivedi, R. K.

A. Sircar, R. K. Dwivedi, and R. K. Thareja, Appl. Phys. B 63, 623 (1996).

Eckbreth, A. C.

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

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

Edner, H.

Egermann, J.

F. Rabenstein, J. Egermann, A. Leipertz, and N. D’Alfonso, “Vapor-phase structures of Diesel-type fuel sprays: an experimental analysis,” SAE paper 982543 (Society of Automotive Engineers, Warrendale, Pa., 1998).

Fiechtner, G. J.

Q. V. Nguyen, R. W. Dibble, C. D. Carter, G. J. Fiechtner, and R. S. Barlow, Combust. Flame 105, 499 (1996).
[CrossRef]

Greenhalgh, D. A.

Kojima, J.

Leipertz, A.

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, Opt. Lett. 29, 247 (2004).
[CrossRef] [PubMed]

F. Rabenstein, J. Egermann, A. Leipertz, and N. D’Alfonso, “Vapor-phase structures of Diesel-type fuel sprays: an experimental analysis,” SAE paper 982543 (Society of Automotive Engineers, Warrendale, Pa., 1998).

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, “Determination of the gas-phase temperature in the vaporizing spray of a GDI-injector using pure rotational CARS,” SAE paper 2004-01-1350 (Society of Automotive Engineers, Warrendale, Pa., 2004).

Nguyen, Q. V.

Q. V. Nguyen, R. W. Dibble, C. D. Carter, G. J. Fiechtner, and R. S. Barlow, Combust. Flame 105, 499 (1996).
[CrossRef]

Nguyen, Q.-V.

Parameswaran, T.

Phuoc, T. X.

T. X. Phuoc, Opt. Commun. 175, 419 (2000).
[CrossRef]

Rabenstein, F.

F. Rabenstein, J. Egermann, A. Leipertz, and N. D’Alfonso, “Vapor-phase structures of Diesel-type fuel sprays: an experimental analysis,” SAE paper 982543 (Society of Automotive Engineers, Warrendale, Pa., 1998).

Sawchuk, R. A.

Seeger, T.

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, Opt. Lett. 29, 247 (2004).
[CrossRef] [PubMed]

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, “Determination of the gas-phase temperature in the vaporizing spray of a GDI-injector using pure rotational CARS,” SAE paper 2004-01-1350 (Society of Automotive Engineers, Warrendale, Pa., 2004).

Sircar, A.

A. Sircar, R. K. Dwivedi, and R. K. Thareja, Appl. Phys. B 63, 623 (1996).

Snelling, D. R.

Thareja, R. K.

A. Sircar, R. K. Dwivedi, and R. K. Thareja, Appl. Phys. B 63, 623 (1996).

Whittley, S. T.

Appl. Opt. (5)

Appl. Phys. B (1)

A. Sircar, R. K. Dwivedi, and R. K. Thareja, Appl. Phys. B 63, 623 (1996).

Combust. Flame (1)

Q. V. Nguyen, R. W. Dibble, C. D. Carter, G. J. Fiechtner, and R. S. Barlow, Combust. Flame 105, 499 (1996).
[CrossRef]

Opt. Commun. (1)

T. X. Phuoc, Opt. Commun. 175, 419 (2000).
[CrossRef]

Opt. Lett. (2)

Other (3)

F. Rabenstein, J. Egermann, A. Leipertz, and N. D’Alfonso, “Vapor-phase structures of Diesel-type fuel sprays: an experimental analysis,” SAE paper 982543 (Society of Automotive Engineers, Warrendale, Pa., 1998).

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

F. Beyrau, A. Bräuer, T. Seeger, and A. Leipertz, “Determination of the gas-phase temperature in the vaporizing spray of a GDI-injector using pure rotational CARS,” SAE paper 2004-01-1350 (Society of Automotive Engineers, Warrendale, Pa., 2004).

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Figures (5)

Fig. 1
Fig. 1

Schematic of an optical ring cavity used as a pulse stretcher: Ms, mirrors; BS, beam splitter.

Fig. 2
Fig. 2

Comparison of experimental RCARS spectra acquired in room air, with the cavity in use (black curve) or blocked by a beam dump (gray curve).

Fig. 3
Fig. 3

Probability density function of the temperature results from 300 single-shot VCARS spectra with (a) the cavity blocked by a beam dump and (b) the cavity in use.

Fig. 4
Fig. 4

Probability density of the temperature results from 300 single-shot RCARS spectra with (a) the cavity blocked by a beam dump and (b) the cavity in use.

Fig. 5
Fig. 5

Probability density of the oxygen concentration results from 300 single-shot RCARS spectra with (a) the cavity blocked by a beam dump and (b) the cavity in use.

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