Abstract

An experimental apparatus employing a standard sulfide imaging tube to characterize the real-time far-field patterns of laser diodes is described. The proposed measuring technique provides a dynamic range of 25 dB and an angular resolution of 0.1°. Compensation techniques for the tube’s nonuniform gamma factor and optical linearization of the tube’s inherent angular distortion are described.

© 1983 Optical Society of America

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References

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  1. S. Peled, Appl. Opt. 19, 324 (1980).
    [CrossRef] [PubMed]
  2. D. D. Cook, F. R. Nash, J. Appl. Phys. 46, 1660 (1975).
    [CrossRef]
  3. RCA Camera Tube Appl. Note AN-4974.
  4. RCA Ultricon Camera Tube (4532/V, 4875/V Series) Inf. Sheet.
  5. S. Jeffers, W. G. Weller, Appl. Opt. 20, 665 (1981).
    [CrossRef] [PubMed]
  6. G. W. Liesegang, P. D. Smith, Appl. Opt. 21, 1437 (1982).
    [CrossRef] [PubMed]
  7. Hamamatsu Technical Data Book C-1000.
  8. RCA Imaging Devices Guide (1981).
  9. D. R. Scifres, W. Streifer, R. D. Burnham, IEEE J. Quantum Electron. QE-17, 2310 (1981).
    [CrossRef]
  10. W. L. Wolf, G. J. Zissis, The Infrared Handbook (IRIA, Washington, D.C., 1978), p. 13-3.

1982

1981

D. R. Scifres, W. Streifer, R. D. Burnham, IEEE J. Quantum Electron. QE-17, 2310 (1981).
[CrossRef]

S. Jeffers, W. G. Weller, Appl. Opt. 20, 665 (1981).
[CrossRef] [PubMed]

1980

1975

D. D. Cook, F. R. Nash, J. Appl. Phys. 46, 1660 (1975).
[CrossRef]

Burnham, R. D.

D. R. Scifres, W. Streifer, R. D. Burnham, IEEE J. Quantum Electron. QE-17, 2310 (1981).
[CrossRef]

Cook, D. D.

D. D. Cook, F. R. Nash, J. Appl. Phys. 46, 1660 (1975).
[CrossRef]

Jeffers, S.

Liesegang, G. W.

Nash, F. R.

D. D. Cook, F. R. Nash, J. Appl. Phys. 46, 1660 (1975).
[CrossRef]

Peled, S.

Scifres, D. R.

D. R. Scifres, W. Streifer, R. D. Burnham, IEEE J. Quantum Electron. QE-17, 2310 (1981).
[CrossRef]

Smith, P. D.

Streifer, W.

D. R. Scifres, W. Streifer, R. D. Burnham, IEEE J. Quantum Electron. QE-17, 2310 (1981).
[CrossRef]

Weller, W. G.

Wolf, W. L.

W. L. Wolf, G. J. Zissis, The Infrared Handbook (IRIA, Washington, D.C., 1978), p. 13-3.

Zissis, G. J.

W. L. Wolf, G. J. Zissis, The Infrared Handbook (IRIA, Washington, D.C., 1978), p. 13-3.

Appl. Opt.

IEEE J. Quantum Electron.

D. R. Scifres, W. Streifer, R. D. Burnham, IEEE J. Quantum Electron. QE-17, 2310 (1981).
[CrossRef]

J. Appl. Phys.

D. D. Cook, F. R. Nash, J. Appl. Phys. 46, 1660 (1975).
[CrossRef]

Other

RCA Camera Tube Appl. Note AN-4974.

RCA Ultricon Camera Tube (4532/V, 4875/V Series) Inf. Sheet.

Hamamatsu Technical Data Book C-1000.

RCA Imaging Devices Guide (1981).

W. L. Wolf, G. J. Zissis, The Infrared Handbook (IRIA, Washington, D.C., 1978), p. 13-3.

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Figures (11)

Fig. 1
Fig. 1

Far-field radiation measurement setup.

Fig. 2
Fig. 2

Modified camera structure showing the rotary laser holder.

Fig. 3
Fig. 3

Example of the monitored laser far-field radiation pattern with nonlinear amplitude scaling: (a) perpendicular and (b) parallel to the junction plane.

Fig. 4
Fig. 4

Peak amplitude of the far-field pattern as a function of laser power for pulsed and cw operation.

Fig. 5
Fig. 5

Variation of the imaging tube sensitivity with laser power for cw and pulsed operation (1% duty factor).

Fig. 6
Fig. 6

Analog circuit for correcting the effect of a nonunity gamma on the recorded patterns.

Fig. 7
Fig. 7

Monitored patterns with γ = 0.65 (Fig. 3) and the corrected patterns: (a) perpendicular and (b) parallel to the junction plane.

Fig. 8
Fig. 8

Relative input vs output for γ = 0.65 and γ = 1 indicating the correction needed at different levels.

Fig. 9
Fig. 9

Illustration of the angular distortion on the photoconductor surface for a uniform spherical wave and its effect on the intensity distribution.

Fig. 10
Fig. 10

Scheme of a cylindrical lens design to compensate the angular distortion.

Fig. 11
Fig. 11

Effect of angular distortion on the amplitude of the radiation pattern as a function of the radiation angle for no lens and with lenses of different radii of curvature.

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