Tapered metal-coated optical fibers for high-energy laser pulses delivery

Alexander G. Papashvili; Vladimir A. Bogatyrjov; Konstantin M. Golant; Valery A. Kozlov; Alexander N. Perov; Alexander V. Shakhanov; Alexej Alexander Sysoliatin

doi:10.1117/12.180709

28 July 1994 Tapered metal-coated optical fibers for high-energy laser pulses delivery

Alexander G. Papashvili, Vladimir A. Bogatyrjov, Konstantin M. Golant, Valery A. Kozlov, Alexander N. Perov, Alexander V. Shakhanov, Alexej Alexander Sysoliatin

Author Affiliations +

Proceedings Volume 2131, Biomedical Fiber Optic Instrumentation; (1994) https://doi.org/10.1117/12.180709
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Metal-coated (Al) tapered all-silica fibers with core diameter up to 1.2 mm, the input/output diameter ratio up to 3:1, the tapered length 1.5 - 2 m, and the core-clad refractive index difference up to 0.017 have been prepared for high energy laser pulses delivery. The increased input diameter allows us to launch higher energy into the fiber keeping the surface power density well below the threshold of radiation-induced surface damage. Using laser radiation with the beam divergence of 3 mrad, the transmission of the fibers has been found to be 85%. Both free running and Q-switched TEM₀₀-mode regimes of Nd:YAG laser have been used to demonstrate stable operation of the fibers for the following set of input parameters: 40 mJ pulse energy, 25 ns pulse duration, and 15 Hz pulse repetition rate.

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Alexander G. Papashvili, Vladimir A. Bogatyrjov, Konstantin M. Golant, Valery A. Kozlov, Alexander N. Perov, Alexander V. Shakhanov, and Alexej Alexander Sysoliatin "Tapered metal-coated optical fibers for high-energy laser pulses delivery", Proc. SPIE 2131, Biomedical Fiber Optic Instrumentation, (28 July 1994); https://doi.org/10.1117/12.180709

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