Abstract
A nonresonant cavity to build up laser intensity is modeled, developed, and tested. It can be used for overlapping multiple lasers of different wavelengths, increasing their intensities by more than an order of magnitude while maintaining good uniformity. It is simple to set up, has flexible optical characteristics, and is robust against perturbations. The intensity buildup requires no resonances, and the wavelength dependence of the performance is limited only by the mirror coatings. The cavity can be used, for example, in applications requiring a spatially constrained intensity buildup, such as in atomic and molecular traps.
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