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Miluski P, Markowski K, Kochanowicz M, Łodziński M, Pisarski WA, Pisarska J, Kuwik M, Leśniak M, Dorosz D, Żmojda J, Ragiń T, Dorosz J. Broadband Profiled Eye-Safe Emission of LMA Silica Fiber Doped with Tm 3+/Ho 3+ Ions. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7679. [PMID: 38138821 PMCID: PMC10744985 DOI: 10.3390/ma16247679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023]
Abstract
LMA (Large Mode Area) optical fibers are presently under active investigation to explore their potential for generating laser action or broadband emission directly within the optical fiber structure. Additionally, a wide mode profile significantly reduces the power distribution density in the fiber cross-section, minimizing the power density, photodegradation, or thermal damage. Multi-stage deposition in the MCVD-CDT system was used to obtain the structural doping profile of the LMA fiber multi-ring core doped with Tm3+ and Tm3+/Ho3+ layer profiles. The low alumina content (Al2O3: 0.03wt%) results in low refractive index modification. The maximum concentrations of the lanthanide oxides were Tm2O3: 0.18wt % and Ho2O3: 0.15wt%. The double-clad construction of optical fiber with emission spectra in the eye-safe spectral range of (1.55-2.10 µm). The calculated LP01 Mode Field Diameter (MFD) was 69.7 µm (@ 2000 nm, and 1/e of maximum intensity), which confirms LMA fundamental mode guiding conditions. The FWHM and λmax vs. fiber length are presented and analyzed as a luminescence profile modification. The proposed structured optical fiber with a ring core can be used in new broadband optical radiation source designs.
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Affiliation(s)
- Piotr Miluski
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Street, 15-351 Bialystok, Poland; (K.M.); (M.K.); (J.Ż.); (T.R.); (J.D.)
| | - Krzysztof Markowski
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Street, 15-351 Bialystok, Poland; (K.M.); (M.K.); (J.Ż.); (T.R.); (J.D.)
| | - Marcin Kochanowicz
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Street, 15-351 Bialystok, Poland; (K.M.); (M.K.); (J.Ż.); (T.R.); (J.D.)
| | - Marek Łodziński
- Faculty of Geology, Geophysics and Environment Protection, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Krakow, Poland;
| | - Wojciech A. Pisarski
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland; (W.A.P.); (J.P.); (M.K.)
| | - Joanna Pisarska
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland; (W.A.P.); (J.P.); (M.K.)
| | - Marta Kuwik
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland; (W.A.P.); (J.P.); (M.K.)
| | - Magdalena Leśniak
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Krakow, Poland; (M.L.); (D.D.)
| | - Dominik Dorosz
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Krakow, Poland; (M.L.); (D.D.)
| | - Jacek Żmojda
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Street, 15-351 Bialystok, Poland; (K.M.); (M.K.); (J.Ż.); (T.R.); (J.D.)
| | - Tomasz Ragiń
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Street, 15-351 Bialystok, Poland; (K.M.); (M.K.); (J.Ż.); (T.R.); (J.D.)
| | - Jan Dorosz
- Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Street, 15-351 Bialystok, Poland; (K.M.); (M.K.); (J.Ż.); (T.R.); (J.D.)
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