Intensity filtration of laser light

Abstract
The nonlinear optical properties of carbon disulfide and bleachable dyes are utilized to construct a variety of intensity filters for 1.06‐μm picosecond pulses. The principle object of the study was the development of a filter that discriminates against low intensities, but the devices may be easily adjusted to limit high‐intensity hot spots or combined to form positive or negative notch filters. Applications to other wevelengths and/or time regimes are possible. The devices also show promise as isolators and pulse shapers.