Letter | Published:

Spectra of Giant Pulses from a Ruby Laser

Nature volume 199, pages 12811282 (28 September 1963) | Download Citation

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Abstract

THE spectral character of the giant pulse1 emitted by a ruby laser has been investigated to determine the suitability of this source for plasma light scattering experiments. A ‘Trion LS-4: laser’ system consisting of a 10 cm × 1.3 cm × 1.3 cm total internal reflexion ruby with 90° c-axis orientation, pumped by means of a 10,000 joule spiral xenon flash-lamp, has been modified to produce giant pulses by the addition of a Kerr cell, a Nicol prism, and a 48 per cent reflectivity dielectric mirror acting as external reflector. Giant pulses which last for less than 40 n sec were produced by switching the Kerr cell with a low inductance thyratron circuit. The Kerr cell was normally gated open for 1 µsec. Throughout the experiment the pumping energy delivered to the flash-lamp was maintained at 6,700±300 joules, which is about 25 per cent above threshold for normal relaxation oscillations in this crystal at the temperature at which it was operated, namely 126±3° K. High-resolution spectroscopy of these pulses was carried out with a variable gap silvered Fabry–Perot interferometer which had a resolving limit of 0.011 cm−1 for 1 cm separation of the mirrors. To ensure that only giant pulse light was recorded, a Barr and Stroud framing camera operated at a speed of 10 µsec per frame was used to photograph the interference fringes on Gaevert infra-red sensitive film (‘Scientia 52A86’).

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References

  1. 1.

    , and , Proc. I.E.E.E., 51, 1962 (1963).

  2. 2.

    , and , J. App. Phys., 33, 3201 (1962).

  3. 3.

    , Nature, 195, 325 (1962).

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Author notes

    • D. J. BRADLEY

    Present address: Physics Department, Imperial College of Science and Technology, London.

Affiliations

  1. Culham Laboratory, U.K. Atomic Energy Authority, Abingdon, Berks.

    • D. J. BRADLEY
    • , A. W. DESILVA
    • , D. E. EVANS
    •  & M. J. FORREST

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https://doi.org/10.1038/1991281a0

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