Abstract

In a master oscillator power amplifier system a powerful train of pulses can be generated. A simple method is described to measure the duration of these pulses. The measurements have been performed both at the fundamental frequency (1053 nm) and at the second harmonic (527 nm). In accordance with theoretical expectations we have observed a narrowing of the pulse owing to frequency doubling.

© 1996 Optical Society of America

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References

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  1. R. F. X. A. M. Mols, G. J. Ernst, “Performance of a MOPA laser system for photocathode research,” Nucl. Instrum. Methods A 341, 481–483 (1994).
    [CrossRef]
  2. R. Wyatt, E. E. Marinaro, “Versatile single-shot background-free pulse duration measurement technique for pulses of subnanosecond to picosecond duration,” Appl. Phys. 25, 297–301 (1981).
    [CrossRef]

1994 (1)

R. F. X. A. M. Mols, G. J. Ernst, “Performance of a MOPA laser system for photocathode research,” Nucl. Instrum. Methods A 341, 481–483 (1994).
[CrossRef]

1981 (1)

R. Wyatt, E. E. Marinaro, “Versatile single-shot background-free pulse duration measurement technique for pulses of subnanosecond to picosecond duration,” Appl. Phys. 25, 297–301 (1981).
[CrossRef]

Ernst, G. J.

R. F. X. A. M. Mols, G. J. Ernst, “Performance of a MOPA laser system for photocathode research,” Nucl. Instrum. Methods A 341, 481–483 (1994).
[CrossRef]

Marinaro, E. E.

R. Wyatt, E. E. Marinaro, “Versatile single-shot background-free pulse duration measurement technique for pulses of subnanosecond to picosecond duration,” Appl. Phys. 25, 297–301 (1981).
[CrossRef]

Mols, R. F. X. A. M.

R. F. X. A. M. Mols, G. J. Ernst, “Performance of a MOPA laser system for photocathode research,” Nucl. Instrum. Methods A 341, 481–483 (1994).
[CrossRef]

Wyatt, R.

R. Wyatt, E. E. Marinaro, “Versatile single-shot background-free pulse duration measurement technique for pulses of subnanosecond to picosecond duration,” Appl. Phys. 25, 297–301 (1981).
[CrossRef]

Appl. Phys. (1)

R. Wyatt, E. E. Marinaro, “Versatile single-shot background-free pulse duration measurement technique for pulses of subnanosecond to picosecond duration,” Appl. Phys. 25, 297–301 (1981).
[CrossRef]

Nucl. Instrum. Methods A (1)

R. F. X. A. M. Mols, G. J. Ernst, “Performance of a MOPA laser system for photocathode research,” Nucl. Instrum. Methods A 341, 481–483 (1994).
[CrossRef]

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Figures (3)

Fig. 1
Fig. 1

Alignment of the Inrad Model 514B autocorrelator. The photomultiplier is a Hamamatsu Model R212UH. SHG, second harmonic generation.

Fig. 2
Fig. 2

Schematic of the experimental setup that was used to measure the duration of the micropulses after amplification. The optional BBO crystal can be used to frequency double the pulses.

Fig. 3
Fig. 3

A, ac trace from an infinitely long pulse train, measured before the macropulse is sliced out. B, ac trace measured after the macropulse has been sliced out. C, ac trace measured after the macropulses have been amplified. D, ac trace of the pulses after the amplified macropulses have been frequency doubled.

Equations (1)

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ϕ = ( f rot - n f b ) t ,

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