Abstract

We present an experimental study of the pulse shape, delay, and spread of an optical pulse transmitted through a medium containing uniform latex microspheres using a mode-locked Nd:glass laser with a 20-psec pulse width. The delay of the arrival time of the peak intensity and the half-power pulse width for three different particle sizes are shown for an optical distance of up to 45.

© 1983 Optical Society of America

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References

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  1. G. C. Mooradian, M. Geller, L. B. Stotts, D. H. Stephens, and R. A. Krautwald, “Blue-green pulsed propagation through fog,” Appl. Opt. 18, 429–441 (1979).
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    [Crossref]
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1982 (1)

1980 (1)

1979 (2)

1978 (1)

1973 (2)

Bruckner, A. P.

Bucher, E. A.

Geller, M.

Ishimaru, A.

Krautwald, R. A.

Kuga, Y.

A. Ishimaru and Y. Kuga, “Attenuation constant of a coherent field in a dense distribution of particles,” J. Opt. Soc. Am. 72, 1317–1320 (1982).
[Crossref]

Y. Kuga, “Laser light propagation and scattering in a dense distribution of spherical particles,” Ph.D. Thesis (University of Washington, Seattle, Wash., 1983.

Lerner, R. M.

Mooradian, G. C.

Reynolds, L.

Shimizu, K.

Stephens, D. H.

Stotts, L. B.

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Figures (6)

Fig. 1
Fig. 1

Schematic diagram of the experimental apparatus. A is the mode-locked Nd:glass laser; B is the picosecond shutter; C is the low-light-level solid-state detector system.

Fig. 2
Fig. 2

Time-resolved measurements of transmitted pulse shapes and intensities. Particle size is 0.109 μm and path length is 20 mm; a is the volume density 0%, and the corresponding τ = 0; curve b = 0.0495%, τ = 2.32; curve c = 0.099%, τ = 4.64; curve d = 0.1486%, τ = 6.96; curve e = 0.1981%, τ = 9.28; curve f = 0.2377%, τ = 11.14; curve g = 0.2971%, τ = 13.92; and curve h = 0.3962%, τ = 18.56.

Fig. 3
Fig. 3

Time-resolved measurements of transmitted pulse shapes and intensities. Particle size is 2.02 μm and path length is 20 mm; a is the volume density 0%, and the corresponding τ = 0; curve b = 0.01266%, τ = 4.24; curve c = 0.0253%, τ = 8.47; curve d = 0.03797%, τ = 12.71; curve e = 0.0506%, τ = 16.94; curve f = 0.0608%, τ = 20.33; curve g = 0.0759%, τ = 25.41; and curve h = 0.1013%, τ = 33.88.

Fig. 4
Fig. 4

Time-resolved measurements of transmitted pulse shapes and intensities. Particle size is 2.02 μm and path length is 50 mm; curve a is the volume density 0%, and the corresponding τ = 0; curve b = 0.00475%, τ = 3.97; curve c = 0.00949%, τ = 7.94; curve d = 0.0127%, τ = 10.59; curve e = 0.01898%, τ = 15.88; curve f = 0.0253%, τ = 21.17; curve g = 0.0304, τ = 25.41; and curve h = 0.03798%, τ = 31.77.

Fig. 5
Fig. 5

Received energy versus optical distance. Path length is 20 mm; ×, 0.109 μm; ○, 0.481 μm; △, 2.02 μm; 0, □, 5.7 μm.

Fig. 6
Fig. 6

Arrival time of the peak intensity t0 versus optical distance: ●, 0.481 μm; ▲, 2.02 μm; ■, 5.7, μm. Half-power pulse width Δt versus optical distance: ○, 0.481 μm; △, 2.02 μm; □, 5.7 μm. Path length is 20 mm and L/C is 88.67 psec.

Equations (1)

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σ t = ( - 1 / ρ L ) log ( I c o h / I 0 ) ,