Abstract

A large-angle phase-matching geometry that yields spatially resolved coherent anti-Stokes Raman generation along a line is demonstrated. Preliminary results of applying this technique to measure the CH4-concentration distribution along a line in a jet flow field are presented.

© 1979 Optical Society of America

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References

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  1. P. R. Régnier, J. P. E. Taran, Appl. Phys. Lett. 23, 240 (1973).
    [CrossRef]
  2. W. M. Tolles, J. W. Nibler, J. R. McDonald, A. B. Harvey, Appl. Spectrosc. 31, 253 (1977).
    [CrossRef]
  3. A. C. Eckbreth, Appl. Phys. Lett. 32, 421 (1978).
    [CrossRef]
  4. S. Chandra, A. Compaan, E. Wiener-Avnear, Appl. Phys. Lett. 33, 867 (1978).
    [CrossRef]
  5. A. C. Eckbreth, presented at 17th Aerospace Sciences Meeting, New Orleans, Louisiana, January 1979, AIAA paper 79-0083.
  6. Pressure broadening in CH4 results in an actual density dependence of N1.82 rather than the theoretical N2 dependence. See W. B. Roh, P. W. Schreiber, Appl. Opt. 17, 1418 (1978).
    [CrossRef] [PubMed]
  7. I. R. Beattie, J. D. Black, T. R. Gilson, Combust. Flame 33, 101 (1978).
    [CrossRef]

1978 (4)

A. C. Eckbreth, Appl. Phys. Lett. 32, 421 (1978).
[CrossRef]

S. Chandra, A. Compaan, E. Wiener-Avnear, Appl. Phys. Lett. 33, 867 (1978).
[CrossRef]

Pressure broadening in CH4 results in an actual density dependence of N1.82 rather than the theoretical N2 dependence. See W. B. Roh, P. W. Schreiber, Appl. Opt. 17, 1418 (1978).
[CrossRef] [PubMed]

I. R. Beattie, J. D. Black, T. R. Gilson, Combust. Flame 33, 101 (1978).
[CrossRef]

1977 (1)

1973 (1)

P. R. Régnier, J. P. E. Taran, Appl. Phys. Lett. 23, 240 (1973).
[CrossRef]

Beattie, I. R.

I. R. Beattie, J. D. Black, T. R. Gilson, Combust. Flame 33, 101 (1978).
[CrossRef]

Black, J. D.

I. R. Beattie, J. D. Black, T. R. Gilson, Combust. Flame 33, 101 (1978).
[CrossRef]

Chandra, S.

S. Chandra, A. Compaan, E. Wiener-Avnear, Appl. Phys. Lett. 33, 867 (1978).
[CrossRef]

Compaan, A.

S. Chandra, A. Compaan, E. Wiener-Avnear, Appl. Phys. Lett. 33, 867 (1978).
[CrossRef]

Eckbreth, A. C.

A. C. Eckbreth, Appl. Phys. Lett. 32, 421 (1978).
[CrossRef]

A. C. Eckbreth, presented at 17th Aerospace Sciences Meeting, New Orleans, Louisiana, January 1979, AIAA paper 79-0083.

Gilson, T. R.

I. R. Beattie, J. D. Black, T. R. Gilson, Combust. Flame 33, 101 (1978).
[CrossRef]

Harvey, A. B.

McDonald, J. R.

Nibler, J. W.

Régnier, P. R.

P. R. Régnier, J. P. E. Taran, Appl. Phys. Lett. 23, 240 (1973).
[CrossRef]

Roh, W. B.

Schreiber, P. W.

Taran, J. P. E.

P. R. Régnier, J. P. E. Taran, Appl. Phys. Lett. 23, 240 (1973).
[CrossRef]

Tolles, W. M.

Wiener-Avnear, E.

S. Chandra, A. Compaan, E. Wiener-Avnear, Appl. Phys. Lett. 33, 867 (1978).
[CrossRef]

Appl. Opt. (1)

Appl. Phys. Lett. (3)

P. R. Régnier, J. P. E. Taran, Appl. Phys. Lett. 23, 240 (1973).
[CrossRef]

A. C. Eckbreth, Appl. Phys. Lett. 32, 421 (1978).
[CrossRef]

S. Chandra, A. Compaan, E. Wiener-Avnear, Appl. Phys. Lett. 33, 867 (1978).
[CrossRef]

Appl. Spectrosc. (1)

Combust. Flame (1)

I. R. Beattie, J. D. Black, T. R. Gilson, Combust. Flame 33, 101 (1978).
[CrossRef]

Other (1)

A. C. Eckbreth, presented at 17th Aerospace Sciences Meeting, New Orleans, Louisiana, January 1979, AIAA paper 79-0083.

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Figures (3)

Fig. 1
Fig. 1

(a) The large-angle phase-matching configuration. For the 2914-cm−1 vibrational mode of CH4 and a k1 beam wavelength of 0.532 μm, α = 9.50° and β = 8.12°. (b) The beam geometry in the probe region. The k1 beams are cylindrically focused sheets, and k2 is a spherically focused line. The k3 signal beam from the line is collimated in the plane of the figure and diverging out of the plane.

Fig. 2
Fig. 2

The experimental arrangement. The designation is: M, mirror; BS, beam splitter; L, lens; DC, dye cell; D, dichroic; P, prism; PD, photodiode; F, filter.

Fig. 3
Fig. 3

Experimental results with CH4 gas. (a) Averaged anti-Stokes signal as a function of position with the probe region uniformly flooded with CH4. (b) and (c) Average CH4 density N at 3 and 2 diameters, respectively, downstream from a 2-mm-diameter nozzle.

Equations (1)

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Δ k l = k 1 l ( Δ α cos α - Δ β sin β ) ,

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