Spectroscopic properties of Nd, Er codoped glasses for solar pumped fiber lasers

Shintaro Mizuno; Hiroshi Ito; Kazuo Hasegawa; Hiroyuki Kawai; Hiroyuki Nasu; Mark A. Hughes; Takenobu Suzuki; Yasutake Ohishi

doi:10.1117/12.874616

23 February 2011 Spectroscopic properties of Nd, Er codoped glasses for solar pumped fiber lasers

Shintaro Mizuno, Hiroshi Ito, Kazuo Hasegawa, Hiroyuki Kawai, Hiroyuki Nasu, Mark A. Hughes, Takenobu Suzuki, Yasutake Ohishi

Author Affiliations +

Proceedings Volume 7934, Optical Components and Materials VIII; 79341D (2011) https://doi.org/10.1117/12.874616
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

The absorption and fluorescence characteristics of Er doped and Nd, Er codoped fluoride glasses were investigated under illumination of the simulated sunlight, laser or a monochromatic light filtered from a Xe lamp. Er was used as a sensitizing agent enhancing the energy conversion and the emission efficiency of Nd ions in fluoride glass intended for the sunlight excitation. Er doped fluoride glasses showed four emission peaks under simulated sunlight illumination at the wavelengths of 550, 848, 980, and 1530 nm attributed to the electronic transitions of Er³⁺ ions. The quantum efficiency of the emission from all of the bands had a peak at x = 0.5 mol. % Er and with the maximum of 73 %. The intensity of each emission band showed different ratios for various ErF₃ contents. It is expected that concentration quenching of ⁴S_3/2 state is easy to occur with high concentration of ErF₃ compared to the other states. The energy transfer from Er to Nd was studied using a monochromatic light illumination which is absorbed by Er³⁺ ions only. Strong contribution of Er absorption to the 1.05 μm emission of Nd, Er co-doped fluoride glass was observed. Er was confirmed as a suitable sensitizer for the enhanced energy conversion and emission efficiency of Nd ions in ZBLAN glasses which are proposed for highly efficient solar pumped fiber lasers.

Citation Download Citation

Shintaro Mizuno, Hiroshi Ito, Kazuo Hasegawa, Hiroyuki Kawai, Hiroyuki Nasu, Mark A. Hughes, Takenobu Suzuki, and Yasutake Ohishi "Spectroscopic properties of Nd, Er codoped glasses for solar pumped fiber lasers", Proc. SPIE 7934, Optical Components and Materials VIII, 79341D (23 February 2011); https://doi.org/10.1117/12.874616

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