Abstract

Optical homodyne detection in the backscatter direction is achieved through a pair of collinearly located fibers in a cylindrical probe body. One fiber illuminates the scattering solution while the other fiber provides optical mixing of the backscattered optical field with a local oscillator derived from the Fresnel reflections at the glass interfaces of the sample container. Homodyne detection is possible over a broad range of particle size and sample concentration with a single probe design.

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References

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  1. B. Chu, Laser Light Scattering (Academic1991).
  2. R. G. W. Brown, Appl. Opt. 40, 4004 (2001).
    [CrossRef]
  3. D. A. Ross, H. S. Dhadwal, and R. B. Dyott, J. Colloid Interface Sci. 64, 533 (1978).
    [CrossRef]
  4. H. Auweter and D. Horn, J. Colloid Interface Sci. 105, 399 (1985).
    [CrossRef]
  5. H. S. Dhadwal, R. R. Ansari, and W. V. Meyer, Rev. Sci. Instrum. 63, 2963 (1991).
    [CrossRef]
  6. D. Lilge and D. Horn, J. Scholarship Teach. Learn. 269, 704 (1991).
  7. D. E. Koppel, J. Chem. Phys. 57, 4814 (1972).
    [CrossRef]

2001 (1)

1991 (2)

H. S. Dhadwal, R. R. Ansari, and W. V. Meyer, Rev. Sci. Instrum. 63, 2963 (1991).
[CrossRef]

D. Lilge and D. Horn, J. Scholarship Teach. Learn. 269, 704 (1991).

1985 (1)

H. Auweter and D. Horn, J. Colloid Interface Sci. 105, 399 (1985).
[CrossRef]

1978 (1)

D. A. Ross, H. S. Dhadwal, and R. B. Dyott, J. Colloid Interface Sci. 64, 533 (1978).
[CrossRef]

1972 (1)

D. E. Koppel, J. Chem. Phys. 57, 4814 (1972).
[CrossRef]

Appl. Opt. (1)

J. Chem. Phys. (1)

D. E. Koppel, J. Chem. Phys. 57, 4814 (1972).
[CrossRef]

J. Colloid Interface Sci. (2)

D. A. Ross, H. S. Dhadwal, and R. B. Dyott, J. Colloid Interface Sci. 64, 533 (1978).
[CrossRef]

H. Auweter and D. Horn, J. Colloid Interface Sci. 105, 399 (1985).
[CrossRef]

J. Scholarship Teach. Learn. (1)

D. Lilge and D. Horn, J. Scholarship Teach. Learn. 269, 704 (1991).

Rev. Sci. Instrum. (1)

H. S. Dhadwal, R. R. Ansari, and W. V. Meyer, Rev. Sci. Instrum. 63, 2963 (1991).
[CrossRef]

Other (1)

B. Chu, Laser Light Scattering (Academic1991).

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Figures (4)

Fig. 1
Fig. 1

HFBP schematic. G, Gaussian illumination; L, local oscillator; S, scattered field.

Fig. 2
Fig. 2

Photograph of the end face of the HFBP. F, 125 μ m diameter bore hole.

Fig. 3
Fig. 3

Measured local oscillator intensity for two HFBP designs. Triangles, MMF receiver; squares, SMF receiver; solid curve, expected response.

Fig. 4
Fig. 4

Measured intensity autocorrelation for sample S2.

Tables (2)

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Table 1 Test Samples of Polystyrene Latex Sphere Standards a

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Table 2 Recovered Size Information from Seven Independent Measurements a

Equations (1)

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G ( 2 ) ( τ ) = B [ 1 + 2 I S I L β g ( 1 ) ( τ ) ] ,

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