Narrow Results

Formulas for the transfer function and the output power gain are presented for an Er³⁺/Yb³⁺ codoped series-cascaded double microring resonator (MRR). Around the pumping wavelength of 974 nm and the central signal wavelength of 1530 nm, the effects of the pump power, signal power, Er³⁺/Yb³⁺ dopant concentrations and amplitude coupling ratios on the signal output spectrum are analyzed. The computed results show that the device can possess both the filtering and amplifying functions for the signal light. In the case of the amplitude coupling ratio between the microring and the channel being 0.17, and that between two microrings being 0.012, the device can produce more than 10.13 dB signal power gain.

In this paper, we report on the application of wavelet-based FDTD in numerical simulation of erbium-ytterbium co-doped waveguide amplifier (EYCDWA) using multi resolution analysis (MRA). The difference formulation for multiresolution time domain(MRTD) based on Daubechies wavelets is derived, and the gain characteristics of EYCDWA is simulated by MRTD. It demonstrates that this new algorithm is valid and shows good agreement with experimental results.