Abstract

The detection of OH in a laminar premixed air–methane flame by degenerate four-wave mixing (DFWM) is The detection reported. The four-wave mixing spectrum was recorded in the region of the R1, R2 band heads of the (0, 0) 2∑–2Π transition, showing clearly resolved rotational structure. Applications of the DFWM technique to combustion are discussed. As an example, the distribution of sodium atoms in a sodium-seeded flame has been diagnostics measured using a 90° geometry to enhance spatial resolution.

© 1986 Optical Society of America

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References

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1985 (3)

J. Pender, L. Hesselink, Opt. Lett. 10, 264 (1985).
[CrossRef] [PubMed]

M. D. Fayer, Chem. Phys. Lett. 117, 12 (1985); A. E. Siegman, Appl. Phys. Lett. 30, 21 (1977).
[CrossRef]

G. Alber, J. Cooper, P. Ewart, Phys. Rev. A 31, 2344 (1985).
[CrossRef] [PubMed]

1983 (1)

1982 (3)

1981 (2)

A. F. Bunkin, N. I. Koroteev, Sov. Phys. Usp. 24, 395, 1981; R. J. Hall, A. C. Ekbreth, in Laser Applications, J. F. Ready, R. K. Erf, eds. (Academic, New York, 1984), Vol. 5.
[CrossRef]

D. Bloch, R. K. Raj, J. J. Snyder, M. Ducloy, J. Phys. Lett. 42, L31 (1981).
[CrossRef]

1979 (1)

1962 (1)

G. H. Dieke, H. M. Crosswhite, J. Quant. Spectrosc. Radiat. Transfer 2, 97 (1962).
[CrossRef]

Alber, G.

G. Alber, J. Cooper, P. Ewart, Phys. Rev. A 31, 2344 (1985).
[CrossRef] [PubMed]

Aldén, M.

Bechtel, J. H.

Bloch, D.

D. Bloch, R. K. Raj, J. J. Snyder, M. Ducloy, J. Phys. Lett. 42, L31 (1981).
[CrossRef]

Bunkin, A. F.

A. F. Bunkin, N. I. Koroteev, Sov. Phys. Usp. 24, 395, 1981; R. J. Hall, A. C. Ekbreth, in Laser Applications, J. F. Ready, R. K. Erf, eds. (Academic, New York, 1984), Vol. 5.
[CrossRef]

Cooper, J.

G. Alber, J. Cooper, P. Ewart, Phys. Rev. A 31, 2344 (1985).
[CrossRef] [PubMed]

Crosswhite, H. M.

G. H. Dieke, H. M. Crosswhite, J. Quant. Spectrosc. Radiat. Transfer 2, 97 (1962).
[CrossRef]

Dieke, G. H.

G. H. Dieke, H. M. Crosswhite, J. Quant. Spectrosc. Radiat. Transfer 2, 97 (1962).
[CrossRef]

Ducloy, M.

D. Bloch, R. K. Raj, J. J. Snyder, M. Ducloy, J. Phys. Lett. 42, L31 (1981).
[CrossRef]

Edner, H.

Ewart, P.

G. Alber, J. Cooper, P. Ewart, Phys. Rev. A 31, 2344 (1985).
[CrossRef] [PubMed]

P. Ewart, S. V. O’Leary, J. Phys. B 15, 3669 (1982).
[CrossRef]

S. V. O’Leary, P. Ewart, presented at the VIIth National Quantum Electronics Conference, Malvern, UK., 1985.

Fayer, M. D.

M. D. Fayer, Chem. Phys. Lett. 117, 12 (1985); A. E. Siegman, Appl. Phys. Lett. 30, 21 (1977).
[CrossRef]

Hesselink, L.

Hogberg, T.

Holmstedt, G.

King, G. B.

Koroteev, N. I.

A. F. Bunkin, N. I. Koroteev, Sov. Phys. Usp. 24, 395, 1981; R. J. Hall, A. C. Ekbreth, in Laser Applications, J. F. Ready, R. K. Erf, eds. (Academic, New York, 1984), Vol. 5.
[CrossRef]

Laurendau, N. M.

Lucht, R. P.

O’Leary, S. V.

P. Ewart, S. V. O’Leary, J. Phys. B 15, 3669 (1982).
[CrossRef]

S. V. O’Leary, P. Ewart, presented at the VIIth National Quantum Electronics Conference, Malvern, UK., 1985.

Pender, J.

Pokrowsky, P.

Raj, R. K.

D. Bloch, R. K. Raj, J. J. Snyder, M. Ducloy, J. Phys. Lett. 42, L31 (1981).
[CrossRef]

Salmon, J. T.

Snyder, J. J.

D. Bloch, R. K. Raj, J. J. Snyder, M. Ducloy, J. Phys. Lett. 42, L31 (1981).
[CrossRef]

Svanberg, S.

Sweeney, D. W.

Tam, A. C.

Teets, R. E.

Zapka, W.

Appl. Opt. (2)

Chem. Phys. Lett. (1)

M. D. Fayer, Chem. Phys. Lett. 117, 12 (1985); A. E. Siegman, Appl. Phys. Lett. 30, 21 (1977).
[CrossRef]

J. Phys. B (1)

P. Ewart, S. V. O’Leary, J. Phys. B 15, 3669 (1982).
[CrossRef]

J. Phys. Lett. (1)

D. Bloch, R. K. Raj, J. J. Snyder, M. Ducloy, J. Phys. Lett. 42, L31 (1981).
[CrossRef]

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

G. H. Dieke, H. M. Crosswhite, J. Quant. Spectrosc. Radiat. Transfer 2, 97 (1962).
[CrossRef]

Opt. Lett. (3)

Phys. Rev. A (1)

G. Alber, J. Cooper, P. Ewart, Phys. Rev. A 31, 2344 (1985).
[CrossRef] [PubMed]

Sov. Phys. Usp. (1)

A. F. Bunkin, N. I. Koroteev, Sov. Phys. Usp. 24, 395, 1981; R. J. Hall, A. C. Ekbreth, in Laser Applications, J. F. Ready, R. K. Erf, eds. (Academic, New York, 1984), Vol. 5.
[CrossRef]

Other (1)

S. V. O’Leary, P. Ewart, presented at the VIIth National Quantum Electronics Conference, Malvern, UK., 1985.

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Figures (3)

Fig. 1
Fig. 1

Typical spectra of OH recorded by DFWM in the flame, showing clearly resolved rotational lines (a) R1(9) transition at 306.36nm and (b) R1(6) and R1(12) transitions [with a satellite R1(6′)] at 306.49 and 306.51 nm.

Fig. 2
Fig. 2

Logarithmic plot of DFWM signal in OH versus laser power. A line of slope 3 is indicated showing the expected cubic dependence.

Fig. 3
Fig. 3

Relative concentration map of Na density in the seeded flame. The position of the burner head is marked for reference. The units are arbitrary and correspond approximately to 1011 atoms cm−3.

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