Photorefractive Polymers Achieve Net Gain, High Diffraction Efficiency and Speed

The protection of eyes and sensors from exposure to intense, frequency-agile lasers, using passive optical limiters, is an active area of research. Material and device requirements include high transmission of low intensity light over a broad range of wavelengths, wide field-of-view, a fast yet persistent temporal response, and the ability to avoid or recover from optical damage. Research efforts to optimize the nonlinear optical properties of materials used in optical limiters have resulted in the development of many new and interesting materials.

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