Abstract

A system of an add-drop microring resonator integrated with a sampled grating distributed feedback (SG-DFB) is investigated via modeling and simulation with the time-domain traveling wave (TDTW) method. The proposed microring resonator comprises a SiO₂ waveguide integrated with an InGaAsP/InP SG-DFB, and the SiO₂ waveguide consists of a silicon core having a refractive index of 3.48 and Kerr coefficient of 4.5×10⁻¹⁸ m²/W. The SG-DFB consists of a series of grating bursts that are constructed using a periodic apodization function with a burst spacing in the grating of 45 μm, a burst length of 5 μm, and 10 bursts across the total length of the SG-DBR. Transmission results of the through and drop port of the microring resonator show the significant capacity enhancement of the generated center wavelengths. The Q-factor of the microring resonator system, defined as the center wavelength (λ₀) divided by 3 dB FWHM, without and with integration with the SG-DFB is calculated as 1.93×10⁵ and 2.87×10⁵, respectively. Analysis of the dispersion of the system reveals that increasing the wavelength results in a decrease of the dispersion. The higher capacity and efficiency are the advantages of integrating the microring resonator and the InGaAsP/InP SG-DFB.

© 2016 Chinese Laser Press

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