21 August 1995 CO2 laser power delivery with an MIR optical fiber bundle
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The solid core polycrystalline middle infrared region (MIR) optical fiber has no bending loss and has been successfully used as a flexible CO2 laser guide for medical operations. By using a suitable cooling we have improved the power handling capacity for (phi) 1 mm MIR- fiber to 50 W. However this is far less than the needs for most nonmedical applications, like the 500 W requirements for cork cutting. For this purpose a method was developed to join together several fibers and transmit more power. With a fiber bundle composed of 4 MIR fibers, about 120 W is transmitted (with about 50% efficiency for cw power). Preliminary tests were made to improve the power handling capacity and efficiency, so that, in future, about 500 W CO2 laser power can be delivered by using a larger fiber bundle.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dawei Liang, Dawei Liang, Joao M. Coelho, Joao M. Coelho, M. Teixeira, M. Teixeira, } "CO2 laser power delivery with an MIR optical fiber bundle", Proc. SPIE 2538, Nonimaging Optics: Maximum Efficiency Light Transfer III, (21 August 1995); doi: 10.1117/12.216982; https://doi.org/10.1117/12.216982

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