Abstract

In this paper we report on the results of comparative investigations of different pump cavities. Numerical estimations of the geometrical transfer efficiency of various cavities are presented. An experimental study of the pumping efficiency and pumping uniformity of the laser heads with respect to the cavity geometry, types of flashlamp, and reflecting coatings have been carried out. The influence of the discharge circuit on the pumping efficiency is also discussed.

© 1990 Optical Society of America

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References

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  1. W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1976) Chaps. 3, 5, 6, and references therein.
  2. F. Docchio, L. Pallaro, O. Svelto, “Pump Cavities for Compact Pulsed Nd:YAG Lasers: a Comparative Study,” Appl. Opt. 24, 3752–3755 (1985).
    [CrossRef] [PubMed]
  3. C. Bowness, “On the Efficiency of Single and Multiple Elliptical Laser Cavities,” Appl. Opt. 4, 103–107 (1965).
    [CrossRef]
  4. D. Skinner, “The Effect of Laser-Rod Properties on the Energy Transfer Efficiency of Pumping Cavities Using Helical Flash Lamps,” Appl. Opt. 8, 1467–1470 (1969).
    [CrossRef] [PubMed]
  5. J. Whittle, D. R. Skinner, “Transfer Efficiency Formula for Diffusely Reflecting Laser Pumping Cavities,” Appl. Opt. 5, 1179–1182 (1966).
    [CrossRef] [PubMed]
  6. F. Docchio, “The Rod Image: a New Method for the Calculation of Pump Efficiency in Reflecting Close-Coupled Cavities,” Appl. Opt. 24, 3746–3751 (1985).
    [CrossRef] [PubMed]
  7. S. Dimov, L. Pavlov, K. Stamenov, “Frequency-Stable Electro-Optically Q-Switched Nd:YAG Laser,” J. Phys. E 17, 451–454 (1984).
    [CrossRef]
  8. S. Dimov, L. Pavlov, K. Stamenov, N. Khadzhiisky, “Assignment of Iodine B-x Lines by Resonant Coherent Anti-Stokes Raman Spectrascopy,” J. Raman Spectrosc. 17, 277–282 (1986).
    [CrossRef]
  9. O. Svelto, Principles of Lasers (Plenum, New York, 1982), Chap. 5.
  10. P. Laporta, V. Magni, O. Svelto, “Comparative Study of the Optical Pumping Efficiency in Solid-State Lasers,” IEEE J. Quantum Electron. QE-21, 1211–1218 (1985).
    [CrossRef]
  11. S. B. Schuldt, R. L. Aagard, “An Analysis of Radiation Transfer by Means of Elliptical Cylinder Reflectors,” Appl. Opt. 2, 509–513 (1963).
    [CrossRef]
  12. B. Smith, “Lamps for Pumping Solid-State Lasers: Performance and Optimization,” Laser Focus, 58, Sept. (1986).
  13. Handbook of Lasers, A. Prokhorov, Ed., (Sov. Radio, Moskow, 1978), Chap. 2.

1986 (2)

S. Dimov, L. Pavlov, K. Stamenov, N. Khadzhiisky, “Assignment of Iodine B-x Lines by Resonant Coherent Anti-Stokes Raman Spectrascopy,” J. Raman Spectrosc. 17, 277–282 (1986).
[CrossRef]

B. Smith, “Lamps for Pumping Solid-State Lasers: Performance and Optimization,” Laser Focus, 58, Sept. (1986).

1985 (3)

1984 (1)

S. Dimov, L. Pavlov, K. Stamenov, “Frequency-Stable Electro-Optically Q-Switched Nd:YAG Laser,” J. Phys. E 17, 451–454 (1984).
[CrossRef]

1969 (1)

1966 (1)

1965 (1)

1963 (1)

Aagard, R. L.

Bowness, C.

Dimov, S.

S. Dimov, L. Pavlov, K. Stamenov, N. Khadzhiisky, “Assignment of Iodine B-x Lines by Resonant Coherent Anti-Stokes Raman Spectrascopy,” J. Raman Spectrosc. 17, 277–282 (1986).
[CrossRef]

S. Dimov, L. Pavlov, K. Stamenov, “Frequency-Stable Electro-Optically Q-Switched Nd:YAG Laser,” J. Phys. E 17, 451–454 (1984).
[CrossRef]

Docchio, F.

Khadzhiisky, N.

S. Dimov, L. Pavlov, K. Stamenov, N. Khadzhiisky, “Assignment of Iodine B-x Lines by Resonant Coherent Anti-Stokes Raman Spectrascopy,” J. Raman Spectrosc. 17, 277–282 (1986).
[CrossRef]

Koechner, W.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1976) Chaps. 3, 5, 6, and references therein.

Laporta, P.

P. Laporta, V. Magni, O. Svelto, “Comparative Study of the Optical Pumping Efficiency in Solid-State Lasers,” IEEE J. Quantum Electron. QE-21, 1211–1218 (1985).
[CrossRef]

Magni, V.

P. Laporta, V. Magni, O. Svelto, “Comparative Study of the Optical Pumping Efficiency in Solid-State Lasers,” IEEE J. Quantum Electron. QE-21, 1211–1218 (1985).
[CrossRef]

Pallaro, L.

Pavlov, L.

S. Dimov, L. Pavlov, K. Stamenov, N. Khadzhiisky, “Assignment of Iodine B-x Lines by Resonant Coherent Anti-Stokes Raman Spectrascopy,” J. Raman Spectrosc. 17, 277–282 (1986).
[CrossRef]

S. Dimov, L. Pavlov, K. Stamenov, “Frequency-Stable Electro-Optically Q-Switched Nd:YAG Laser,” J. Phys. E 17, 451–454 (1984).
[CrossRef]

Schuldt, S. B.

Skinner, D.

Skinner, D. R.

Smith, B.

B. Smith, “Lamps for Pumping Solid-State Lasers: Performance and Optimization,” Laser Focus, 58, Sept. (1986).

Stamenov, K.

S. Dimov, L. Pavlov, K. Stamenov, N. Khadzhiisky, “Assignment of Iodine B-x Lines by Resonant Coherent Anti-Stokes Raman Spectrascopy,” J. Raman Spectrosc. 17, 277–282 (1986).
[CrossRef]

S. Dimov, L. Pavlov, K. Stamenov, “Frequency-Stable Electro-Optically Q-Switched Nd:YAG Laser,” J. Phys. E 17, 451–454 (1984).
[CrossRef]

Svelto, O.

P. Laporta, V. Magni, O. Svelto, “Comparative Study of the Optical Pumping Efficiency in Solid-State Lasers,” IEEE J. Quantum Electron. QE-21, 1211–1218 (1985).
[CrossRef]

F. Docchio, L. Pallaro, O. Svelto, “Pump Cavities for Compact Pulsed Nd:YAG Lasers: a Comparative Study,” Appl. Opt. 24, 3752–3755 (1985).
[CrossRef] [PubMed]

O. Svelto, Principles of Lasers (Plenum, New York, 1982), Chap. 5.

Whittle, J.

Appl. Opt. (6)

IEEE J. Quantum Electron. (1)

P. Laporta, V. Magni, O. Svelto, “Comparative Study of the Optical Pumping Efficiency in Solid-State Lasers,” IEEE J. Quantum Electron. QE-21, 1211–1218 (1985).
[CrossRef]

J. Phys. E (1)

S. Dimov, L. Pavlov, K. Stamenov, “Frequency-Stable Electro-Optically Q-Switched Nd:YAG Laser,” J. Phys. E 17, 451–454 (1984).
[CrossRef]

J. Raman Spectrosc. (1)

S. Dimov, L. Pavlov, K. Stamenov, N. Khadzhiisky, “Assignment of Iodine B-x Lines by Resonant Coherent Anti-Stokes Raman Spectrascopy,” J. Raman Spectrosc. 17, 277–282 (1986).
[CrossRef]

Laser Focus (1)

B. Smith, “Lamps for Pumping Solid-State Lasers: Performance and Optimization,” Laser Focus, 58, Sept. (1986).

Other (3)

Handbook of Lasers, A. Prokhorov, Ed., (Sov. Radio, Moskow, 1978), Chap. 2.

W. Koechner, Solid-State Laser Engineering (Springer-Verlag, New York, 1976) Chaps. 3, 5, 6, and references therein.

O. Svelto, Principles of Lasers (Plenum, New York, 1982), Chap. 5.

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Figures (4)

Fig. 1
Fig. 1

Cross section of the laser cavities, investigated experimentally: (a). Elliptical cavity REC 1, a = 15, e = 0.4, cavity length l = 75; (b). Elliptical cavity REC 2, a = 20, e = 0.5, l = 75; (c). Cylindrical cavity RCC 1, ϕ = 40, x = 11, l = 60; (d). Cylindrical cavity RCC 2, ϕ = 24, x = 12, l = 55; (dimensions in mm).

Fig. 2
Fig. 2

Experimentally obtained input/output energy dependences of the four cavities, pumped by Xe and Kr flsahlamps.

Fig. 3
Fig. 3

Experimental results of the η = Wout/Win as a function of the pump energy; the corresponding density power is also indicated.

Fig. 4
Fig. 4

Intensity profiles of the output beams, obtained by using the cavities tested. The intensity distribution along two axes is measured: horizontal axis, connecting the lamp and rod centers (left), and vertical axis (right).

Tables (1)

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Table 1 Theoretical and Experimental Characteristics of the Cavities Investigated.

Equations (11)

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η s = η p · η c · η A ,
η p = η t · η r · η a · η q
η c = γ 1 / 2 γ ,
η A = A e / A ,
γ = γ i + ( γ 1 + γ 2 ) / 2 ,
γ 1 , 2 = - l n R 1 , 2
W out = η s ( W in - W t h )
η s = d W out / d W in
- l n ( R 1 ) 2 + γ i = η p A . I s · P t h = K · W t h τ p ,
η p = 3.46 % with Kr and 2.70 % with Xe lamp , η s = 2.85 % with Kr and 2.28 % with Xe lamp .
W t h c s / W t h L C = 0.5 ; η s c s / η s L C = 2.5.

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