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oai:recercat.cat:2445/243662025-12-04T21:28:52Zcom_2072_1057col_2072_478812col_2072_478917

00925njm 22002777a 4500 dc Navarro Urrios, Daniel author Ferrarese Lupi, Federico author Prtljaga, Nikola author Pitanti, Alessandro author Jambois, Olivier author Ramírez Ramírez, Joan Manel author Berencén Ramírez, Yonder Antonio author Daldosso, Nicola author Garrido Fernández, Blas author Pavesi, Lorenzo author 2012-04-23T10:34:29Z 2012-04-23T10:34:29Z 2011 We present a study that demonstrates the limits for achieving net optical gain in an optimized waveguide where Si nanoclusters in SiO2 codoped with Er3+ are the active material. By cross correlating absorption losses measurements with copropagant pump (λpump = 1.48 µm) and probe (λprobe = 1.54 µm) experiments we reveal that the role of more than 80% of the total Er3+ population present on the material (intended for optical amplification purposes) is to absorb the propagating light, since it is unfeasible to invert it. Fotònica Òptica integrada Photonics Integrated optics Copropagating pump and probe experiments on Si-nc in SiO2 rib waveguides doped with Er: The optical role of non-emitting ions