Environmental sensing: utilizing a material with a helical pitch highly sensitive to temperature, electric subject, magnetic field, or mechanical strain, shade shift of the output laser gives a easy, direct measurement of environmental circumstances. Jacobs; Cerqua; Marshall; Schmid; Guardalben; Skerrett (1988). “Liquid-crystal laser optics: design, fabrication, and performance”. Kogelnik, H.; C.V. Shank (1971). “Stimulated emission […]