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Proceedings Paper

Characterization of upconversion phenomena in Er3+-doped Ti:LiNbO3 waveguides using the fluorescence around 550 nm
Author(s): Niculae N. Puscas; Bruno Wacogne; Vincent Voinot; Richard Ferriere
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Paper Abstract

In this paper, we report theoretical and experimental results concerning the upconversion phenomena around 550 nm in Er3+-doped Ti:LiNbO3 waveguides. This phenomena corresponds transitions between the levels 4S3/2 implied by 4I15/2. The waveguide is pumped near 980 nm with a laser diode. Two pump photons are used to bring the Er ions to the short lifetime level 4F7/2. After a non-radiative transition to the level 4S3/2, Er ions emit photons at 550 nm while falling down to the 4I15/2 level. By using the theoretical model elaborated by McCumber we evaluate the homogeneous emission cross sections and we obtain the following maximum values of the cross sections (sigma) He(551.9 nm) equals 57.7 x 10-26 m2 for TE and (sigma) He(558.1 nm) equals 52.5 x 10-26 m2 for TM polarizations. By measuring the fluorescence radiation around (lambda) equals 550 nm, we determine the rising and falling times and we obtain C equals 0.198 x 10-23 m3/s as the value of the modulus of the homogeneous upconversion factor the value. The results presented here can be used in the design of integrated optoelectronic circuits and in the modeling of the laser action and optical amplification in Er3+-doped Ti:LiNbO3 waveguides when a 980 nm pumping is considered.

Paper Details

Date Published: 29 June 2001
PDF: 13 pages
Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); doi: 10.1117/12.432870
Show Author Affiliations
Niculae N. Puscas, Univ. Politehnica Bucharest (Romania)
Bruno Wacogne, Univ. de Franche-Comte (France)
Vincent Voinot, Univ. de Franche-Comte (France)
Richard Ferriere, Univ. de Franche-Comte (France)

Published in SPIE Proceedings Vol. 4430:
ROMOPTO 2000: Sixth Conference on Optics
Valentin I. Vlad, Editor(s)

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