Dolan-Jenner Industries of Boxborough, MA, a manufacturer of fiber optic light guides and fiber optic illumination systems, has enhanced and expanded its custom fiber optics, engineering, and technical support capabilities. The company provides a wide range of custom and standard fiber optic sensing and illumination solutions. Its Custom Light Guides are suited to extreme environments, from under the sea to satellites in space, and can withstand operating temperatures from -65ºC to more than 1,000ºC.