Abstract

The results of an experimental investigation of the performance characteristics of a Q-switched Nd:YAG laser utilizing a negative-branch unstable resonator is presented. Measurements indicate that near diffraction-limited beam quality has been attained with a system in the rangefinder/designator energy category. In a performance comparison with a conventional parallel-plane mirror resonator, the unstable resonator was found to produce equally efficient operation with greatly superior beam radiance and tolerance to mirror misalignment.

© 1976 Optical Society of America

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References

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  1. A. E. Siegman, Appl. Opt. 13, 353 (1974) and numerous references therein.
    [CrossRef] [PubMed]
  2. T. F. Ewanizky, Appl. Phys. Lett. 25, 295 (1974).
    [CrossRef]
  3. W. F. Krupke, W. R. Sooy, IEEE J. Quantum Electron. QE-5, 575 (1969).
    [CrossRef]
  4. Laser Precision Corp., 5 W. Whitesboro St., Yorkville, New York 13495.
  5. M. Borne, E. Wolf, Principles of Optics (Pergamon, London, 1970), p. 384.
  6. Ref. 5, p. 417.
  7. Ref. 5, p. 385.
  8. M. M. Birky, Appl. Opt. 8, 2249 (1969).
    [CrossRef] [PubMed]
  9. D. B. Rensch, A. N. Chester, Appl. Opt. 12, 997 (1973).
    [CrossRef] [PubMed]
  10. Yu. A. Ananev et al., Sov. Phys. JETP 28, 69 (1969).
  11. Yu. A. Ananev et al., Sov. Phys. JETP 31, 420 (1970).
  12. A. E. Siegman, H. Y. Miller, Appl. Opt. 9, 2729 (1970).
    [CrossRef] [PubMed]
  13. R. J. Freiburg, P. P. Chenausky, C. J. Buczek, IEEE J. Quantum Electron. QE-8, 882 (1972).
    [CrossRef]

1974 (2)

1973 (1)

1972 (1)

R. J. Freiburg, P. P. Chenausky, C. J. Buczek, IEEE J. Quantum Electron. QE-8, 882 (1972).
[CrossRef]

1970 (2)

Yu. A. Ananev et al., Sov. Phys. JETP 31, 420 (1970).

A. E. Siegman, H. Y. Miller, Appl. Opt. 9, 2729 (1970).
[CrossRef] [PubMed]

1969 (3)

Yu. A. Ananev et al., Sov. Phys. JETP 28, 69 (1969).

W. F. Krupke, W. R. Sooy, IEEE J. Quantum Electron. QE-5, 575 (1969).
[CrossRef]

M. M. Birky, Appl. Opt. 8, 2249 (1969).
[CrossRef] [PubMed]

Ananev, Yu. A.

Yu. A. Ananev et al., Sov. Phys. JETP 31, 420 (1970).

Yu. A. Ananev et al., Sov. Phys. JETP 28, 69 (1969).

Birky, M. M.

Borne, M.

M. Borne, E. Wolf, Principles of Optics (Pergamon, London, 1970), p. 384.

Buczek, C. J.

R. J. Freiburg, P. P. Chenausky, C. J. Buczek, IEEE J. Quantum Electron. QE-8, 882 (1972).
[CrossRef]

Chenausky, P. P.

R. J. Freiburg, P. P. Chenausky, C. J. Buczek, IEEE J. Quantum Electron. QE-8, 882 (1972).
[CrossRef]

Chester, A. N.

Ewanizky, T. F.

T. F. Ewanizky, Appl. Phys. Lett. 25, 295 (1974).
[CrossRef]

Freiburg, R. J.

R. J. Freiburg, P. P. Chenausky, C. J. Buczek, IEEE J. Quantum Electron. QE-8, 882 (1972).
[CrossRef]

Krupke, W. F.

W. F. Krupke, W. R. Sooy, IEEE J. Quantum Electron. QE-5, 575 (1969).
[CrossRef]

Miller, H. Y.

Rensch, D. B.

Siegman, A. E.

Sooy, W. R.

W. F. Krupke, W. R. Sooy, IEEE J. Quantum Electron. QE-5, 575 (1969).
[CrossRef]

Wolf, E.

M. Borne, E. Wolf, Principles of Optics (Pergamon, London, 1970), p. 384.

Appl. Opt. (4)

Appl. Phys. Lett. (1)

T. F. Ewanizky, Appl. Phys. Lett. 25, 295 (1974).
[CrossRef]

IEEE J. Quantum Electron. (2)

W. F. Krupke, W. R. Sooy, IEEE J. Quantum Electron. QE-5, 575 (1969).
[CrossRef]

R. J. Freiburg, P. P. Chenausky, C. J. Buczek, IEEE J. Quantum Electron. QE-8, 882 (1972).
[CrossRef]

Sov. Phys. JETP (2)

Yu. A. Ananev et al., Sov. Phys. JETP 28, 69 (1969).

Yu. A. Ananev et al., Sov. Phys. JETP 31, 420 (1970).

Other (4)

Laser Precision Corp., 5 W. Whitesboro St., Yorkville, New York 13495.

M. Borne, E. Wolf, Principles of Optics (Pergamon, London, 1970), p. 384.

Ref. 5, p. 417.

Ref. 5, p. 385.

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Figures (5)

Fig. 1
Fig. 1

Physical arrangement of the negative-branch, unstable resonator laser and definition of pertinent parameters.

Fig. 2
Fig. 2

Far-field intensity profile of the unstable resonator laser beam as detected by a linear array of pyroelectric elements.

Fig. 3
Fig. 3

Laser burn patterns at 0.25 m, 1.7 m, and 7.2 m from the laser. A Fraunhofer pattern was observed to occur at a distance of ~6 m, corresponding to diffraction theory.

Fig. 4
Fig. 4

Comparison of energy in the bucket measurements of the Q-switched, unstable resonator laser with theoretical angular energy distributions for annulus dimension ratios of = a2/a1 = 0.5 and 0.6. X marks are for measurements with a saturable absorber, circles with a Pockels cell.

Fig. 5
Fig. 5

Comparison of energy-in-the-bucket measurements for the laser with either an unstable or parallel-plane resonator.

Tables (1)

Tables Icon

Table I Comparison of Resonator Performance Characteristics

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