in which primes denote derivatives with respect to the atomic fraction, c, of the second component, t is the time, f the Helmholtz free energy per unit volume, K the gradient-energy coefficient,4 TJ the linear expansion per unit change in atomic fraction, Ya

Peak power in excess of 1 MW, at 1.315-μ wavelength, has been obtained by Q switching a small gaseous CF3I photolysis laser operating in a single axial cavity mode. When several axial modes oscillate, mode locking produces periodic pulsing of the Q-switched output with somewhat enhanced peak power.

Various flashlamps were constructed using quartz envelopes and simple wire electrodes. The lamps were continuously evacuated to minimize explosive failures. Energies in the 10 to 1000 J range were discharged from low inductance capacitors through a triggered spark gap to the lamps. The lamp discharges occurred primarily in vapors ablated from the quartz envelopes and produced intense light pulses of 1 to 10 μsec duration with submicrosecond risetimes. Lamp explosion energies and peak light outputs were empirically found to be simply related to the lamp dimensions, making it possible to quickly design lamps for various applications. Successful pumping of high energy organic dye lasers demonstrated the effectiveness of these lamps in applications requiring short, high intensity pulses.

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