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Non-uniform designs for Erbium doped waveguide amplifiers (EDWA) and Yb: Er co-doped waveguide amplifiers (YEDWA) were presented based on the standard rate equations including six Er energy levels and two Yb energy levels. Numerical results were shown that the design of the non-uniform EDWA operated by gain value get a gain improvement of 110.3% than uniform one, and designs of non-uniform EDWA and YEDWA operated by pump efficiency get gain improvements of 21.03% and 10.17% than uniform ones, even get gain improvements of 2.25% and 7.26% than the absolute gain maximum of uniform EDWA and YEDWA, respectively. The optimization of population inversion in 4I11/2 could be demonstrated by the photoluminescence (PL) enhancement observed in cascaded Er doped glass measurement at room temperature.
Qi Song,ChengRen Li,ShuFeng Li,ChangLie Song,JianYong Li, andSong-Qiang Zhou
"Optical property of non-uniform Er doped and Yb:Er co-doped waveguide amplifiers", Proc. SPIE 6019, Passive Components and Fiber-based Devices II, 601933 (3 December 2005); https://doi.org/10.1117/12.637173
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