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Abstract
A lasing pixel device that implements a spatially patterned variable loss element placed inside an optically pumped high-gain laser cavity is presented. A polymer dispersed liquid crystal (PDLC) modulator was used as the loss element. A projection device has been developed with high output, high on-screen contrast (<1000:1), and narrow spectral linewidth (∼3 nm). These positive characteristics make such a device attractive for a non-scanned laser projection system. A model of PDLC lasing pixel output versus element loss will be presented and compared to electro-optic measurements. PDLC materials from EM Industries have been optimized for this application.