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Proceedings Paper

Spectroscopic properties of Pr-doped PbCl2 for eye-safe 1.6µm laser applications
Author(s): Ivy K. Jones; Uwe Hömmerich; EiEi Brown; Sudhir B. Trivedi
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Paper Abstract

The 1.6 μm emission properties originating from the 3F3, 3F43H4 transition of Pr3+ ions in Pr-doped PbCl2 crystals were investigated for possible application in resonantly-pumped, eye-safe laser development. Pr: PbCl2 was synthesized and purified through a combination of zone-refinement and chlorination of the melt before growing crystals by Bridgman technique. Under optical pumping using a ~1.48 μm laser diode, an IR emission band centered at ~1.65 μm with a full width at half maximum of 75 nm was observed at room temperature. The decay transient of the thermally coupled 3F3 and 3F4 excited states was single exponential with a value of 170 μs at room temperature. The lifetime increased to 350 μs at 77 K suggesting the existence of some non-radiative decay through multi-phonon relaxation. Emission cross-section spectra were determined using the principle of reciprocity and Ladenburg-Fuchtbauer method and yielded peak values of 3.8x10-20 cm2 and 5.7x10-20 cm2 at room-temperature and 77 K, respectively. The effective gain cross-section spectra of Pr: PbCl2 will be discussed for possible lasing in the 1.6-1.7 μm region.

Paper Details

Date Published: 28 February 2014
PDF: 6 pages
Proc. SPIE 8959, Solid State Lasers XXIII: Technology and Devices, 89591T (28 February 2014); doi: 10.1117/12.2037374
Show Author Affiliations
Ivy K. Jones, Hampton Univ. (United States)
Uwe Hömmerich, Hampton Univ. (United States)
EiEi Brown, Hampton Univ. (United States)
Sudhir B. Trivedi, Brimrose Corp. of America (United States)

Published in SPIE Proceedings Vol. 8959:
Solid State Lasers XXIII: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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