Robust Mid-IR Optical Fibers

ABSTRACT: The development of mid-infrared (Mid-IR) transparent fibers having low propagation loss in the wavelength range 2-5 micron, robust mechanical properties, low temperature sensitivity and high laser power delivery capability has been investigated extensively in the last decade. Chalcogenide glass fibers, fluoride glass fibers, tellurite glass fibers, and microstructured silica fibers have been studied in details by many groups around the world. Here we propose to develop an innovative robust mid-IR optical fiber to meet this difficult challenge. During Phase I we will demonstrate this innovative technical approach by fabricating and characterizing fibers. In Phase II we shall demonstrate production of mid-IR fiber for transport of high power (> 100 W) laser output in the 2-5 micron region with less than 0.3dB/m loss, with bend radii <10 cm and high mechanical strength.; BENEFIT: This proposed fiber can be used for delivery of mid-infrared source, infrared fiber optical sensing, IR source generation, IR imaging, and research and development.