Electronically-tuned optical delay lines in silicon

In this work, the properties of the devices in transmission mode are studied and compared with reflection-mode counterparts. The time delay in each case was calculated using the transfer matrix method. The effective refractive index of the sections was determined using the commercial RSoft simulator. A commercial electronic device simulator, ATLAS by Silvaco, was used to determine the carrier concentration in the rib waveguide core at different diode biases. The results on static (e.g., delay tuning range, loss and dispersion) and dynamic (bit rate and switching) properties of the devices are presented and discussed.