Anti-reflective Surface for Infrared Optical Fiber Endfaces

In this SBIR program we propose the design, optimization, experimental evaluation and prototype development of a multilayer AR or low reflectivity of less than 2.5% coating covering wavelength range between 1.4 and 5um. We also propose a novel method by applying both PVD and ALD techniques together in the process of the fabrication. The central layers are going to be made with PVD method, while top environmental barrier to protect whole central coating layers will be fabricated by ALD method. The bottom adhesive layer is also going to be made by ALD method.