Lasers

Emission spectrum and limits of quasi-cw operation of a neodymium laser with an intracavity plasma formed from a carbon target

A. I. Ershov, V. B. Fedorov, I. V. Fomenkov


Abstract: A study was made of millisecond quasi-cw operation of a high-power neodymium laser in which a feedback loop was established by reflection from a carbon target. This target reduced the width of the emission spectrum by a factor of about 10³ during an output pulse, compared with the spectrum obtained under normal free-running spiking conditions. Determination of the limits of quasi-cw operation showed that the threshold of nonlinear reflection of radiation from an erosion carbon plasma, expressed in terms of the density of the laser radiation power reaching the target, was I ≈ 100 MW/cm².

UDC: 621.373.826.038.825.3

PACS: 42.55.Rz, 52.50.Jm, 42.60.Jf, 42.60.Lh, 42.60.Pk

Received: 07.08.1989

 English version: Soviet Journal of Quantum Electronics, 1990, 20:8, 905–909

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