The development of negative curvature fibers is an exciting advance in optical fiber technology that combines relatively low loss over a broad bandwidth with relatively high tolerance for fabrication imperfections. Tolerance of fabrication imperfections is particularly important for chalcogenide fibers, and negative curvature geometries have made it possible to fabricate hollow-core chalcogenide fibers that can transmit light at 10 μm with a loss of 2.1 dB/m. We review theoretical and experimental work that we have carried out to determine the performance limits and to design and fabricate chalcogenide negative curvature fibers.
Curtis R. Menyuk, Chengli Wei, R. Joseph Weiblen, Jonathan Hu, Rafael R. Gattass, L. Brandon Shaw, and Jasbinder S. Sanghera, "Chalcogenide negative curvature fibers," Proc. SPIE 10435, Technologies for Optical Countermeasures XIV, 104350I (Presented at SPIE Security + Defence: September 13, 2017; Published: 5 October 2017); https://doi.org/10.1117/12.2279958.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon