High-Gain Broadband Optical-Waveguide Amplifiers

A novel wideband and high-gain waveguide-amplifier structure, which consists of a folded geometry erbium-ytterbium co-doped phosphate glass waveguide integrated with a cascaded multilayer medium thin-film filter (CMMTFF), is proposed. This CMMTFF consists of some different filter-unit cells with different central wavelengths and bandwidths, and each of them can suppress a certain gain peak at a specific wavelength. The gain characteristics of this new optical amplifiers is obtained. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 64–66, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20208