Tailoring bandgap transmission spectra of new neodymium-doped tellurite all-solid photonic bandgap fibers with double cladding layers

Tong Hoang Tuan; Kohei Suzaki; Nobuhiko Nishiharaguchi; Takenobu Suzuki; Yasutake Ohishi

doi:10.1117/12.2508186

27 February 2019 Tailoring bandgap transmission spectra of new neodymium-doped tellurite all-solid photonic bandgap fibers with double cladding layers

Tong Hoang Tuan, Kohei Suzaki, Nobuhiko Nishiharaguchi, Takenobu Suzuki, Yasutake Ohishi

Author Affiliations +

Proceedings Volume 10914, Optical Components and Materials XVI; 109141O (2019) https://doi.org/10.1117/12.2508186
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Neodymium (Nd)-doped fibers are potential candidates for optical fiber amplifiers operating near the 1.3-μm spectral region due to the ⁴F_3/2→⁴I_13/2 transition of Nd³⁺ ions. But, there is an amplified spontaneous emission at 1.06 μm due to the ⁴F_3/2→⁴I_11/2 transition whose branching ratio is about 5 times larger than that at 1.3 μm. In order to suppress the transmission of the 1.06-μm emission, we propose a new tellurite all-solid photonic bandgap fiber (ASPBF) with a single line of high index rods and double cladding layers. Tellurite glasses of TeO₂-Li₂O-WO₃-MoO₃-Nb₂O₅ (TLWMN), TeO₂- ZnO-Na₂O-La₂O₃ (TZNL) and TeO₂-ZnO-Li₂O-K₂O-Al₂O₃-P₂O₅ (TZLKAP) are developed. High-index rods of TLWMN and an Nd-doped TZNL rod are arranged symmetrically and horizontally in the x-axis of a hexagonal TZNL cladding. The outer cladding is made of the TZLKAP glass. The finite element method is used to calculate the mode distribution and the bandgap properties. The fiber transmission spectra are numerically investigated with the effects of rod diameter and filling factor variation. When the core diameter is 3.0 μm, rod diameter is 2.3 μm and filling factor is from 0.7 to 0.8, the 1.06-μm emission which is caused by the ⁴F_3/2→⁴I_11/2 transition can be suppressed as compared with the 1.33-μm emission which is caused by the ⁴F_3/2→⁴I_13/2 transition.

Citation Download Citation

Tong Hoang Tuan, Kohei Suzaki, Nobuhiko Nishiharaguchi, Takenobu Suzuki, and Yasutake Ohishi "Tailoring bandgap transmission spectra of new neodymium-doped tellurite all-solid photonic bandgap fibers with double cladding layers", Proc. SPIE 10914, Optical Components and Materials XVI, 109141O (27 February 2019); https://doi.org/10.1117/12.2508186

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