Crystal-Free Formation of Non-Oxide Optical Fiber

Researchers at NASA's Marshall Space Flight Center have devised a method for the creation of crystal-free non-oxide optical fiber preforms. Non-oxide fiber optics are extensively used in infrared transmitting applications such as communication systems, chemical sensors, and laser fiber guides for cutting, welding, and medical surgery. Some of these glasses, however, are very susceptible to crystallization. Even small crystals can lead to light scatter and a high attenuation coefficient, limiting their usefulness. NASA has developed a new method of nonoxide fiber formation that uses axial magnetic fields to suppress crystallization. The resulting non-oxide fibers are crystal-free and have lower signal attenuation rates than silica-based optical fibers.