Abstract

Spatially resolved nonlinear scattering of a train of picosecond pulses from ethanol microdroplets is investigated. Different time behavior is observed for light with the same and the opposite sense of circulation as the input-coupled light. The forward-circulating light exhibits a smooth, delayed pulse-to-pulse growth, attributed to increased input coupling with time induced by the laser pulses. The backward-circulating light has an irregular time behavior, attributed to near-backward stimulated Brillouin scattering. Increased scattering as a result of CO2 (compared with He) dissolved gas is demonstrated by an intensity decrease of the spatially precessed radiation on a cavity resonance.

© 1995 Optical Society of America

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  13. Assuming a distortion amplitude of e = (rp − re)/a = 0.005, where rp and re are the polar and equatorial radii, respectively.

1993

1992

1991

1990

H. M. Lai, P. T. Leung, K. Young, P. W. Barber, S. C. Hill, Phys. Rev. A 41, 5187 (1990).
[CrossRef] [PubMed]

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Camplillo, Opt. Lett. 15, 1176 (1990).
[CrossRef] [PubMed]

1988

Barber, P. W.

H. M. Lai, P. T. Leung, K. Young, P. W. Barber, S. C. Hill, Phys. Rev. A 41, 5187 (1990).
[CrossRef] [PubMed]

Campillo, A. J.

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Campillo, “Effect of bubble formation on microdroplet cavity quality factors,” J. Opt. Soc. Am. B (to be published).

Camplillo, A. J.

Cantrell, C. D.

Chang, R. K.

Eversole, J. D.

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Camplillo, Opt. Lett. 15, 1176 (1990).
[CrossRef] [PubMed]

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Campillo, “Effect of bubble formation on microdroplet cavity quality factors,” J. Opt. Soc. Am. B (to be published).

Gerrard, W.

W. Gerrard, Solubility of Gases and Liquids (Plenum, New York, 1976), p. 92Gas Solubilities (Pergamon, Oxford, 1980), p. 34

Hill, S. C.

H. M. Lai, P. T. Leung, K. Young, P. W. Barber, S. C. Hill, Phys. Rev. A 41, 5187 (1990).
[CrossRef] [PubMed]

Huston, A. L.

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Camplillo, Opt. Lett. 15, 1176 (1990).
[CrossRef] [PubMed]

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Campillo, “Effect of bubble formation on microdroplet cavity quality factors,” J. Opt. Soc. Am. B (to be published).

Jarzembski, M. A.

Juvan, K. A.

Lai, H. M.

H. M. Lai, P. T. Leung, C. K. Ng, K. Young, J. Opt. Soc. Am. B 10, 924 (1993).
[CrossRef]

H. M. Lai, P. T. Leung, K. Young, P. W. Barber, S. C. Hill, Phys. Rev. A 41, 5187 (1990).
[CrossRef] [PubMed]

Leach, D. H.

Leung, P. T.

Lin, H.-B.

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Camplillo, Opt. Lett. 15, 1176 (1990).
[CrossRef] [PubMed]

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Campillo, “Effect of bubble formation on microdroplet cavity quality factors,” J. Opt. Soc. Am. B (to be published).

Ng, C. K.

H. M. Lai, P. T. Leung, C. K. Ng, K. Young, J. Opt. Soc. Am. B 10, 924 (1993).
[CrossRef]

C. K. Ng, Ph.D. dissertation (Chinese University of Hong Kong, Shatin, Hong Kong, 1994).

Srivastava, V.

Swindal, J. C.

Wirth, F. H.

Young, K.

H. M. Lai, P. T. Leung, C. K. Ng, K. Young, J. Opt. Soc. Am. B 10, 924 (1993).
[CrossRef]

J. C. Swindal, D. H. Leach, R. K. Chang, K. Young, Opt. Lett. 18, 191 (1993).
[CrossRef] [PubMed]

H. M. Lai, P. T. Leung, K. Young, P. W. Barber, S. C. Hill, Phys. Rev. A 41, 5187 (1990).
[CrossRef] [PubMed]

K. Young, Department of Applied Physics, Chinese University of Hong Kong, Shatin, Hong Kong (personal communication, 1994).

Zhang, J.-Z.

J. Opt. Soc. Am. B

Opt. Lett.

Phys. Rev. A

H. M. Lai, P. T. Leung, K. Young, P. W. Barber, S. C. Hill, Phys. Rev. A 41, 5187 (1990).
[CrossRef] [PubMed]

Other

K. Young, Department of Applied Physics, Chinese University of Hong Kong, Shatin, Hong Kong (personal communication, 1994).

W. Gerrard, Solubility of Gases and Liquids (Plenum, New York, 1976), p. 92Gas Solubilities (Pergamon, Oxford, 1980), p. 34

Assuming a distortion amplitude of e = (rp − re)/a = 0.005, where rp and re are the polar and equatorial radii, respectively.

C. K. Ng, Ph.D. dissertation (Chinese University of Hong Kong, Shatin, Hong Kong, 1994).

A. L. Huston, H.-B. Lin, J. D. Eversole, A. J. Campillo, “Effect of bubble formation on microdroplet cavity quality factors,” J. Opt. Soc. Am. B (to be published).

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Figures (2)

Fig. 1
Fig. 1

(a) Schematic of an ethanol droplet illuminated at the equator by a focused input beam. (b) CCD images of the green and red light scattered at ϕ = 180°; dashed circles outline the droplet rim (magnified). (c) Time profile of the 100-ps, 532-nm input-laser pulses, separated by 13.2 ns. (d) Time profiles of the green light from spots R (reflected/refracted), F (forward circulating), and B (backward circulating) and the red light from B; the red light leaking from F is too weak to be detected by the photodiode.

Fig. 2
Fig. 2

(a) Schematic of an ethanol droplet, axisymmetric along the flow direction (−z axis), illuminated above the equator by a focused beam. (b) CCD image of the green light scattered at ϕ = 105° for CO2-pressurized droplets; the dashed circle outlines the droplet rim. (c) Time profile of the input-laser pulses. (d) Time profiles of the light from spots F1 (forward circulating) and F2 (forward circulating, delayed by one half precession period) for CO2-pressurized droplets. (e) Same as (d) except for He-pressurized droplets. Spot R has the same time profile (not shown) as the input for both CO2- and He-pressurized droplets.

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