Investigation of tapered silver / silver halide coated hollow glass waveguides for the transmission of CO2 laser radiation

Carlos M. Bledt; Daniel V. Kopp; James A. Harrington; Saiko Kino; Yuji Matsuura; Jason M. Kriesel

doi:10.1117/12.912201

16 February 2012 Investigation of tapered silver / silver halide coated hollow glass waveguides for the transmission of CO₂ laser radiation

Carlos M. Bledt, Daniel V. Kopp, James A. Harrington, Saiko Kino, Yuji Matsuura, Jason M. Kriesel

Author Affiliations +

Proceedings Volume 8218, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII; 821802 (2012) https://doi.org/10.1117/12.912201
Event: SPIE BiOS, 2012, San Francisco, California, United States

Abstract

The present study focuses on the theoretical and practical infrared radiation propagation properties of tapered silver / silver iodide coated Hollow Glass Waveguides (HGWs). Tapered HGWs with inner diameters ranging from 300 μm to 650 μm with a linear taper increasing at an approximate rate of 1.5 μm/cm were fabricated and optimized for low-loss transmission of CO₂ laser radiation at of 10.6 μm. The theoretical losses in these tapered silver / silver iodide coated HGWs are calculated for light transmitted from the big to the small and vice versa. Theoretical calculations used in this study are based on ray-optics. Experimental loss measurements are likewise presented, along with the calculated and measured output beam divergence. The experimental bending losses of the tapered HGWs are studied and compared with those measured and for those for non-tapered, straight bore sizes from 300 to 700 μm. Experimental losses for tapered Ag/AgI HGWs ranged from 0.732 - 1.340 dB/m depending on configuration and bending radius.

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Carlos M. Bledt, Daniel V. Kopp, James A. Harrington, Saiko Kino, Yuji Matsuura, and Jason M. Kriesel "Investigation of tapered silver / silver halide coated hollow glass waveguides for the transmission of CO₂ laser radiation", Proc. SPIE 8218, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII, 821802 (16 February 2012); https://doi.org/10.1117/12.912201

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