An Overlap Factor Between Light Intensity Profiles Of Signal And Pump And Gain Characteristic Analysis In Er-doped Waveguide Amplifier

The model used for analyzing the gain characteristics of Er-doped waveguide amplifier (EDWA) is based on the rate -propagation equations with light intensity profiles of pump and signal. The light intensity of pump and signal in different channel opening width (DCOW) of Er-doped waveguide is discussed. And the precise numerical method (PNM), which considers the difference between signal and pump light intensity profiles in channel waveguide with different channel opening widths, is used to solve the gain characteristics of signal light in EDWA. An overlap factorΓspbetween light intensity profiles of signal and pump is introduced to revise the conventional simplified method (CSM) in EDWA, which is the revised conventional simplified method (RCSM). Results show that a gain change of 2.97dB due to DCOW of waveguides is obtained for a 4-cm long waveguide amplifier pumped by 80 mw at 980 nm. And in comparison with CSM, the gain of signal light from RCSM is more approach to the result from PNM. Therefore, the RCSM can be effective in the research and design of EDWA.