Delivery of 1.9μm laser radiation using air-core Bragg fibers

0473111 - ÚFE 2017 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Frank, M. - Jelínek, M. - Kubeček, V. - Podrazký, Ondřej - Kašík, Ivan - Matějec, Vlastimil
Delivery of 1.9μm laser radiation using air-core Bragg fibers.
20TH SLOVAK-CZECH-POLISH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS OF CONTEMPORARY OPTICS. Vol. 10142. Bellinghem: SPIE, 2016 - (Senderáková, D.), č. článku 101421D. ISBN 978-1-5106-0733-0. ISSN 0277-786X. E-ISSN 1996-786X.
[20th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics (SCPOC). Jasna (SK), 05.09.2016-09.09.2016]
Grant CEP: GA ČR GA16-10019S
Institucionální podpora: RVO:67985882
Klíčová slova: Bragg Fiber * Thulium Fiber Laser * Air Core
Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

In this paper we have investigated Bragg fibers for the 1.94 mu m laser-radiation delivery generated by a thulium fiber laser with a maximal continuous output power 50W. For such investigation laboratory-designed and fabricated hollow-core Bragg fibers have been employed with different diameters of 5, 40, 56 and 73 mu m surrounded by three pairs of circular Bragg layers. Fundamental optical characteristics such as overall transmittance, attenuation coefficient, bending losses, and delivered spatial beam profiles at the wavelength of 1.94 mu m for all tested fibers are reported and summarized in this contribution. In the case of laser radiation delivery with the intensity of 65 kW/cm(2), the lowest attenuation coefficient of 1.278 dB/m was determined for the Bragg fiber with the inner air-core diameter of 56 mu m. Moreover, the bending losses for a small bend diameter of 15 mm reached 0.177 dB only. However delivered laser radiation was highly multimode character
Trvalý link: http://hdl.handle.net/11104/0270274