Optical and spectroscopic characterization of Er/Yb-activated planar waveguides

Stefano Pelli; Massimo Brenci; Matteo Fossi; Giancarlo C. Righini; Claire Duverger; Maurizio Montagna; Raffaella Rolli; Maurizio Ferrari

doi:10.1117/12.382851

13 April 2000 Optical and spectroscopic characterization of Er/Yb-activated planar waveguides

Stefano Pelli, Massimo Brenci, Matteo Fossi, Giancarlo C. Righini, Claire Duverger, Maurizio Montagna, Raffaella Rolli, Maurizio Ferrari

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Proceedings Volume 3942, Rare-Earth-Doped Materials and Devices IV; (2000) https://doi.org/10.1117/12.382851
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

Soda-lime silicate glasses doped with different percentages of Er- and Yb-oxides were produced by melting, and both planar and channel waveguides were fabricated by diluted silver ion exchange. Their optical and spectroscopic properties have been investigated, and some results are reported here. The optical parameters such as refractive index, diffusion depth and number of modes were measured by m-line technique. Absorption and fluorescence spectra were also measured; particular attention was focused on upconversion phenomena. The upconversion luminescence spectra of an Er/Yb-activated waveguide were obtained by continuous-wave excitation at 514.5 nm, as a function of the excitation power. The weak upconversion bands are assigned to the ²H_9/2 yields ⁴I_15/2 and ⁴G_11/2 yields ⁴I_15/2 transitions of the Er³⁺ ion. The upconversion mechanism is found to be a two-photon process. Preliminary results of gain measurements in channel waveguides showed signal enhancement at 1.5 micrometers , for high input signal intensities, upon pumping at 0.98 micrometers .

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Stefano Pelli, Massimo Brenci, Matteo Fossi, Giancarlo C. Righini, Claire Duverger, Maurizio Montagna, Raffaella Rolli, and Maurizio Ferrari "Optical and spectroscopic characterization of Er/Yb-activated planar waveguides", Proc. SPIE 3942, Rare-Earth-Doped Materials and Devices IV, (13 April 2000); https://doi.org/10.1117/12.382851

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