Abstract

A calorimeter enclosed in a constant temperature environment has been constructed to measure the output energy of a conventional mode ruby or neodymium laser. The calorimeter was designed according to the measurement theory and has an estimated uncertainty of ±2% in the range 5 J to 100 J. The time–temperature curves were analyzed according to the theory with the aid of a computer program.

© 1971 Optical Society of America

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References

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  1. G. Birnbaum, M. Birnbaum, Proc. IEEE 55, 1026 (1967).
    [CrossRef]
  2. E. D. West, K. L. Churney, J. Appl. Phys. 39, 4906 (1968).
  3. J. Coops, R. S. Jessup, K. Van Ness in Experimental Thermochemistry, F. D. Rossini, Ed. (Interscience, New York, 1956), Vol. 1.
  4. E. D. West, K. L. Churney, J. Appl. Phys. 41, 2705 (1970).
    [CrossRef]
  5. M. M. Birky, Appl. Opt. 8, 2259 (1969).
    [CrossRef]
  6. D. A. Jennings, IEEE Trans. Instrum. Measurements IM-14, 161 (1966).
    [CrossRef]
  7. D. A. McSparron, C. A. Douglas, H. C. Badger, “Radiometric Measurements of Laser Output,” Program Conference on Precision Electromagnetic Measurements (Abstracts, p. 12), NBS, Boulder, Colo. (1966).
  8. Private communications.

1970 (1)

E. D. West, K. L. Churney, J. Appl. Phys. 41, 2705 (1970).
[CrossRef]

1969 (1)

M. M. Birky, Appl. Opt. 8, 2259 (1969).
[CrossRef]

1968 (1)

E. D. West, K. L. Churney, J. Appl. Phys. 39, 4906 (1968).

1967 (1)

G. Birnbaum, M. Birnbaum, Proc. IEEE 55, 1026 (1967).
[CrossRef]

1966 (1)

D. A. Jennings, IEEE Trans. Instrum. Measurements IM-14, 161 (1966).
[CrossRef]

Badger, H. C.

D. A. McSparron, C. A. Douglas, H. C. Badger, “Radiometric Measurements of Laser Output,” Program Conference on Precision Electromagnetic Measurements (Abstracts, p. 12), NBS, Boulder, Colo. (1966).

Birky, M. M.

M. M. Birky, Appl. Opt. 8, 2259 (1969).
[CrossRef]

Birnbaum, G.

G. Birnbaum, M. Birnbaum, Proc. IEEE 55, 1026 (1967).
[CrossRef]

Birnbaum, M.

G. Birnbaum, M. Birnbaum, Proc. IEEE 55, 1026 (1967).
[CrossRef]

Churney, K. L.

E. D. West, K. L. Churney, J. Appl. Phys. 41, 2705 (1970).
[CrossRef]

E. D. West, K. L. Churney, J. Appl. Phys. 39, 4906 (1968).

Coops, J.

J. Coops, R. S. Jessup, K. Van Ness in Experimental Thermochemistry, F. D. Rossini, Ed. (Interscience, New York, 1956), Vol. 1.

Douglas, C. A.

D. A. McSparron, C. A. Douglas, H. C. Badger, “Radiometric Measurements of Laser Output,” Program Conference on Precision Electromagnetic Measurements (Abstracts, p. 12), NBS, Boulder, Colo. (1966).

Jennings, D. A.

D. A. Jennings, IEEE Trans. Instrum. Measurements IM-14, 161 (1966).
[CrossRef]

Jessup, R. S.

J. Coops, R. S. Jessup, K. Van Ness in Experimental Thermochemistry, F. D. Rossini, Ed. (Interscience, New York, 1956), Vol. 1.

McSparron, D. A.

D. A. McSparron, C. A. Douglas, H. C. Badger, “Radiometric Measurements of Laser Output,” Program Conference on Precision Electromagnetic Measurements (Abstracts, p. 12), NBS, Boulder, Colo. (1966).

Van Ness, K.

J. Coops, R. S. Jessup, K. Van Ness in Experimental Thermochemistry, F. D. Rossini, Ed. (Interscience, New York, 1956), Vol. 1.

West, E. D.

E. D. West, K. L. Churney, J. Appl. Phys. 41, 2705 (1970).
[CrossRef]

E. D. West, K. L. Churney, J. Appl. Phys. 39, 4906 (1968).

Appl. Opt. (1)

M. M. Birky, Appl. Opt. 8, 2259 (1969).
[CrossRef]

IEEE Trans. Instrum. Measurements (1)

D. A. Jennings, IEEE Trans. Instrum. Measurements IM-14, 161 (1966).
[CrossRef]

J. Appl. Phys. (2)

E. D. West, K. L. Churney, J. Appl. Phys. 39, 4906 (1968).

E. D. West, K. L. Churney, J. Appl. Phys. 41, 2705 (1970).
[CrossRef]

Proc. IEEE (1)

G. Birnbaum, M. Birnbaum, Proc. IEEE 55, 1026 (1967).
[CrossRef]

Other (3)

J. Coops, R. S. Jessup, K. Van Ness in Experimental Thermochemistry, F. D. Rossini, Ed. (Interscience, New York, 1956), Vol. 1.

D. A. McSparron, C. A. Douglas, H. C. Badger, “Radiometric Measurements of Laser Output,” Program Conference on Precision Electromagnetic Measurements (Abstracts, p. 12), NBS, Boulder, Colo. (1966).

Private communications.

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Figures (4)

Fig. 1
Fig. 1

Diagram of calorimeter. The resistance bridge C is for temperature control, T is a copper resistance thermometer, S is a twenty-junction thermopile, B is the additional shield, A is a control heater, and H1 and H2 are calibration heaters.

Fig. 2
Fig. 2

Calibration curves for heater H1 and heater H2.

Fig. 3
Fig. 3

Schematic of apparatus used to determine amount of energy reflected out of the calorimeter.

Fig. 4
Fig. 4

Typical time–temperature curve for laser pulse.

Tables (2)

Tables Icon

Table I Calibration Factor

Tables Icon

Table II Comparison of Outputs from Cone Calorimeter and Liquid CuSO4 Cell Calorimeter

Equations (4)

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W = E [ T 2 - T 1 + b 1 t 1 t 2 ( T - T ) d t ] ,
T - T = a 1 Φ 1 e - b 1 t ,
T / t = - b 1 ( T - T ) .
T = T 14 - T 0 + b 1 0 14 ( T - T ) d t

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