Tailoring Nd3+ emission spectrum by a neodymium-doped tellurite all-solid photonic bandgap fiber

Hoang Tuan Tong; Daisuke Demichi; Takenobu Suzuki; Yasutake Ohishi

doi:10.1117/12.2289280

22 February 2018 Tailoring Nd³⁺ emission spectrum by a neodymium-doped tellurite all-solid photonic bandgap fiber

Hoang Tuan Tong, Daisuke Demichi, Takenobu Suzuki, Yasutake Ohishi

Proceedings Volume 10528, Optical Components and Materials XV; 105281P (2018) https://doi.org/10.1117/12.2289280
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

A tellurite all-solid photonic bandgap fiber (ASPBF) whose cladding consists of 60 high-index rods arranged periodically around a central core was successfully fabricated. The diameter of high-index rod was about 5.0 μm and the distance between the center of two adjacent high-index rods was approximately 8.0 μm. The high-index rod was made of the TeO₂-Li₂O-WO₃-MoO₃-Nb₂O₅ (TLWMN) glass, the cladding was made of the TeO₂-ZnO-Na₂O-La₂O₃ (TZNL) glass as the background glass material and the central core was made of TZNL glass doped with 0.5 wt% of Nd₂O₃. A supercontinuum light from 0.6 to 2.4 μm was coupled into the core of fiber which is 2.2 cm long to measure its transmission spectrum. High transmission bands were obtained in the vicinity of 0.75 and 1.3 μm but the transmission was suppressed in the wavelength range from 1.0 to 1.06 μm. When a titanium∶Sapphire laser source at 0.75 μm was used, the emission spectrum was obtained with two peaks at 1.06 and 1.33 μm which are attributed to the ⁴F_3/2→⁴I_11/2 and ⁴F_3/2→⁴I_13/2 transitions of Nd³⁺ ion, respectively. The intensities of those emission peaks were compared with those obtained from a bulk glass having the same doping concentration of Nd³⁺. The results showed that by using tellurite ASPBF, the intensity of the 1.06-μm emission was suppressed by one-twelfth but the intensity of the 1.33-μm emission was maintained. This feature is very advantageous to filter out the 1.06-μm emission of Nd³⁺ ion in order to realize practical amplifier devices at 1.3 μm.

Citation Download Citation

Hoang Tuan Tong, Daisuke Demichi, Takenobu Suzuki, and Yasutake Ohishi "Tailoring Nd³⁺ emission spectrum by a neodymium-doped tellurite all-solid photonic bandgap fiber", Proc. SPIE 10528, Optical Components and Materials XV, 105281P (22 February 2018); https://doi.org/10.1117/12.2289280

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KEYWORDS

Glasses

Neodymium

Optical amplifiers

Doping

Fiber amplifiers

Refractive index

Optical fibers

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