Abstract
A halogen atom/metal vapor laser is discussed in terms of CW power and performance. Fluorine and sodium represent surrogates for the halogen and metal species; other combinations are possible. Since lasing may occur from a variety of excited electronic states, operation is expected to be broadly dispersed over the visible and near UV wavelength regions. The device is a low pressure, supersonic mixing laser that resembles the HF/DF CW laser, e.g., separate plenums are utilized for the fluorine and sodium vapors, and each plenum feeds a nozzle array. Sodium trimer formation begins in the nozzle and continues inside the laser cavity. The design of this nozzle is particularly important; the concept of controlled condensation is introduced. Downstream of the nozzle bank, the two vapor streams mix and the F-Na3 reaction pumps several electronically excited states that have gain in the blue-green region. Estimates are given for power per unit mass flow rate and power per unit nozzle bank cross-sectional area. 15 refs.
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