Gain flatness of a planar optical waveguide amplifier

Emission of Er- and Si-doped silicate glass films obtained by magnetron co-sputtering

“…Up to this concentration limit, X-ray absorption fine structure studies of Er-doped aluminosilicates suggest the absence of Er clustering at distances detectable by this technique [8]. Such a material is also characterized by an Er emission broader than its silica counterpart and was recently used for an effective 14 cm-long optical amplifier [9].…”

Hybrid Filter Based on Long-Period Waveguide Grating and Multilayer Medium Thin Film for Broadband Waveguide Amplifiers

“…Er-Yb co-doped phosphate glass, and the gain spectra of EYCDWAs exhibit inhomogeneous broadening, except for the main deleterious peak at ~1532nm, there exist some other minor peaks. In order to achieve a flat gain spectrum several techniques have been developed such as gain saturation [3], advanced broadband amplification materials [4] [5], multilayer medium thin film(MMTF) [6]- [8], longperiod waveguide grating (LPWG) [9],and so on. Among developed techniques, external filters such as MMTF and LPWG suppressing the deleterious gain peak near 1532nm have been found most effective and flexible.…”

Design and Simulation of Broadband IR integrated Waveguide Amplifiers with Long - Period Waveguide Grating Filter

“…For IR integrated optical waveguide amplifiers based on Er-Yb codoped waveguide amplifier(EYCDWA), to achieve large flat-gain bandwidth several techniques have been developed such as gain saturation [3], advanced broadband amplification materials [4,5], multilayer medium thin film filters [6][7][8], and so on. Among developed techniques, external filters such as multilayer medium thin film filters suppressing the deleterious gain peak near 1530 nm have been found most effective and flexible.…”