Handbook of Chemical Lasers

Abstract

Index 733

Performance Analyses of Flowing Chemical Oxygen-Iodine Laser

“…For the Fabry-Perot resonator, with the assumptions that the gain is equal to the loss in the laser cavity and the distributed loss and aperture loss are independent upon the distance x in the streamwise direction ͑the so-called constant gain approximation͒, 7,10,12 it can be deduced that g ϭ g th , dg th dx ϭ 0.…”

“…3,10 Therefore, in order to optimize the adjustable parameters of a supersonic COIL, it is necessary to deduce the SGK model for performance analyses of a supersonic COIL and compare performances predicted by the SGK model with those by the RE model. Apparently, in the development of supersonic HF͞DF chemical lasers and supersonic COIL, it is quite important to ensure the optimization of adjustable parameters.…”

“…For example, the output power was raised from a few watts of multimode limit to several thousand watts of near-diffraction limit in tens of years for flowing HF chemical lasers. 10 There are also great disparities in the chemical efficiencies of supersonic COIL experiments. 11 Herein a spectral line broadening ͑SLB͒ model is one of the key factors in explaining the disparities, and an appropriate SLB model can play an important role in optimizing the adjustable parameters.…”

Imaging spectroradiometer for HF laser studies

“…Fig. 11 shows an image of the spatially resolved population inversion between the HF(v,J) = (2,4) and (1,5) levels. This key demonstration shows that AIRIS can be used to interrogate the small signal gain, a key parameter in HF lasers.…”

Atomic fluorine source for chemical lasers

“…Chemical lasers offer the obvious advantage that the population inversion is produced by selective chemical reactions, e.g., HF lasers 1 or energy transfer from chemically produced metastable species such as the Chemical Oxygen Iodine…”