Characterization of upconversion phenomena in Er3+-doped Ti:LiNbO3 waveguides using the fluorescence around 550 nm

Niculae N. Puscas; Bruno Wacogne; Vincent Voinot; Richard Ferriere

doi:10.1117/12.432870

29 June 2001 Characterization of upconversion phenomena in Er³⁺-doped Ti:LiNbO₃ waveguides using the fluorescence around 550 nm

Niculae N. Puscas, Bruno Wacogne, Vincent Voinot, Richard Ferriere

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Proceedings Volume 4430, ROMOPTO 2000: Sixth Conference on Optics; (2001) https://doi.org/10.1117/12.432870
Event: ROMOPTO 2000: Sixth Conference on Optics, 2000, Bucharest, Romania

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 ⁴S_3/2 implied by ⁴I_15/2. 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 ⁴F_7/2. After a non-radiative transition to the level ⁴S_3/2, Er ions emit photons at 550 nm while falling down to the ⁴I_15/2 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) ^H_e(551.9 nm) equals 57.7 x 10^-26 m² for TE and (sigma) ^H_e(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.

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Niculae N. Puscas, Bruno Wacogne, Vincent Voinot, and Richard Ferriere "Characterization of upconversion phenomena in Er³⁺-doped Ti:LiNbO₃ waveguides using the fluorescence around 550 nm", Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); https://doi.org/10.1117/12.432870

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KEYWORDS

Upconversion

Waveguides

Erbium

Luminescence

Absorption

Ions

Photons

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