Quimby, Richard S.
The purpose of this project was to develop a numerical model in MATLAB of the limitation on signal gain in ytterbium and neodymium doped fiber amplifiers due to amplified spontaneous emission (ASE). It was shown that significant signal gain was achievable in ytterbium devices near 1023 nm despite the ASE limitation. Furthermore, without the inclusion of diffraction gratings to limit ASE near 1060 nm, it was shown to be impossible to obtain significant gain in the 1400 nm range for neodymium doped devices. Other possible signal wavelengths for these dopants were also investigated. Validity of the Equivalent Bandwidth approximation method was also examined, proving to be sufficient in several applications, but in some cases generally misrepresenting the spectra significantly.
Worcester Polytechnic Institute
Major Qualifying Project
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