Impact of nonlinear effects in Si towards integrated microwave-photonic applications
Abstract
As one of major integrated microwave photonics (IMWP) platforms, Si photonics exhibits the intensity-dependent Kerr effect and two-photon absorption (TPA) with associated free carrier effects (FCE). At the commonly used 1.55 µm, TPA losses and the associated FCE would eventually limit the dynamic range of Si photonic links. Resonating structures such as ring resonators (RRs) experience enhanced nonlinear effects due to significant intensity buildup. According to the bandgap characteristics of Si, TPA can be eliminated at and beyond 2.2 µm. In this work, a systemic simulation of straight waveguides and RRs is performed at wavelengths from 1.55 to 2.2 µm where the wavelength-dependent TPA loss is investigated. Moreover, the Kerr effect leads to unwanted change of refractive index, which shifts the RR resonant wavelength at both 1.55 and 2.2 µm, thus needing shift compensation. Compensated RRs operating at 2.2 µm could open a new venue for Si photonics towards IMWP applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 10, 2021
- Source ID
- 10.1364/oe.433646
Entities
People
- Huong Q Tran
- Jake Bass
- Richard Soref
- Shui-Qing Yu
- Wei Du
Organizations
- Air Force Office of Scientific Research
- University of Arkansas
- University of Massachusetts Boston
- Wilkes University