Abstract
The power penalty characteristics of high-speed optical signals transmitted through a variety of filters based on multiple microring resonator devices are analyzed by numerical simulation. The technique used here has been verified with single-ring experimental measurements. Butterworth and Chebyshev filters are investigated, as are serial cascades of resonant devices. Although the power penalty is generally not prohibitive, it is a parameter which cannot be ignored for the design of complex high-bandwidth photonic interconnect systems that utilize microring resonators as filters and switches.
Highlights
Photonic microcavity devices which exhibit sharp spectral features due to resonant recirculation have received significant attention recently [1]
The sharp spectral features of these devices can be leveraged for ultra-dense wavelength division multiplexing (DWDM) and for high-speed wavelength-selective switching, it has been shown that the sidebands of optical signals with high data rates can be affected, resulting in signal distortion [5,6,7,8]
The power penalty which is induced on an optical signal due to sideband attenuation encountered in microring resonator devices with narrow spectral features is a complex parameter
Summary
Photonic microcavity devices which exhibit sharp spectral features due to resonant recirculation have received significant attention recently [1]. The sharp spectral features of these devices can be leveraged for ultra-dense wavelength division multiplexing (DWDM) and for high-speed wavelength-selective switching, it has been shown that the sidebands of optical signals with high data rates can be affected, resulting in signal distortion [5,6,7,8] This can be problematic for systems, such as high-bandwidth integrated optical interconnects and high-density optical telecommunications systems, which would contain many of these devices (e.g. reconfigurable add/drop multiplexers and switching elements) in cascade. This study concludes that the design of microring resonator-based photonic circuits requires a nuanced and thorough understanding of the effects these devices have on high-speed optical signals
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