22 February 2018 Tailoring Nd3+ emission spectrum by a neodymium-doped tellurite all-solid photonic bandgap fiber
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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
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 4F3/24I11/2 and 4F3/24I13/2 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.
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Hoang Tuan Tong, Hoang Tuan Tong, Daisuke Demichi, Daisuke Demichi, Takenobu Suzuki, Takenobu Suzuki, Yasutake Ohishi, 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); doi: 10.1117/12.2289280; https://doi.org/10.1117/12.2289280

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