Preparation and characterization of highly thulium- and alumina-doped optical fibers for single-frequency fiber lasers

Pavel Honzatko; Anirban Dhar; Ivan Kasik; Ondrej Podrazky; Vlastimil Matejec; Pavel Peterka; Wilfried Blanc; Bernard Dussardier

doi:10.1117/12.912536

11 October 2011 Preparation and characterization of highly thulium- and alumina-doped optical fibers for single-frequency fiber lasers

Pavel Honzatko, Anirban Dhar, Ivan Kasik, Ondrej Podrazky, Vlastimil Matejec, Pavel Peterka, Wilfried Blanc, Bernard Dussardier

Author Affiliations +

Proceedings Volume 8306, Photonics, Devices, and Systems V; 830608 (2011) https://doi.org/10.1117/12.912536
Event: Photonics Prague 2011, 2011, Prague, Czech Republic

Abstract

Thulium-doped fibers suitable for core-pumped single-frequency lasers were fabricated by the modified chemical vapor deposition (MCVD) method. Refractive index profile, doping profile and spectral absorption was measured. High doping concentration of thulium ions should be achieved to allow for high absorption of light at a pump wavelength while the thulium ions clustering should be avoided to prevent the cooperative upconversion and quenching processes. The fabricated fibers featured pump absorption up to 70dB/m at a pump wavelength of 1611nm. The single-frequency master oscillator with a resonator composed of a pair of fiber Bragg gratings and a thulium-doped fiber was demonstrated with predominantly single ended operation. We achieved a slope efficiency of 22\% and a threshold of 22mW at a lasing wavelength of 1944nm.

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Pavel Honzatko, Anirban Dhar, Ivan Kasik, Ondrej Podrazky, Vlastimil Matejec, Pavel Peterka, Wilfried Blanc, and Bernard Dussardier "Preparation and characterization of highly thulium- and alumina-doped optical fibers for single-frequency fiber lasers", Proc. SPIE 8306, Photonics, Devices, and Systems V, 830608 (11 October 2011); https://doi.org/10.1117/12.912536

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