A master oscillator power amplifier (MOPA) experiment using an electron-beam-excited KrF oscillator and amplifier is described. The amplifier gain as a function of input intensity is determined. A comparison of the measured gain with calculations using a steady-state analysis yields a determination of the small-signal gain coefficient and saturation intensity for the amplifier operating with two different gas mixtures. The small-signal gain is found to be more than an order of magnitude larger than the nonsaturable loss, indicating that efficient energy extraction from the amplifier is possible under the high excitation conditions (1.5–6 MW/cm3) of this study.
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Patterson et al. (1980) studied this question.
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