Abstract:In the paper, we review our work on heterogeneous III-V-on-silicon photonic components and circuits for applications in optical communication and sensing. We elaborate on the integration strategy and describe a broad range of devices realized on this platform covering a wavelength range from 850 nm to 3.85 μm.
A simple and low-crosstalk 1 × 4 silicon mode (de)multiplexer based on multimode grating-assisted-couplers is proposed. Mode transitions can be flexibly controlled by designing the grating period at the phase-matching condition. Due to the contra-directional coupling, precise control of the coupling strength and the coupling length are not needed in the system. Calculation results show that the insertion loss and the 3 dB bandwidths of the device are 0.2 dB and 3.7 nm, 0.34 dB and 7.6 nm, and 0.21 dB and 11.8 nm for the channels which (de)multiplex to the 1st, 2nd, and 3rd modes of the bus waveguide, respectively.
We propose an add-drop filter with an unlimited free spectral range (FSR). The device is based on grating-assisted contradirectional couplers with silicon-on-insulator ridge waveguides. The intrawaveguide coupling is significantly diminished by distancing the periodically structured corrugated waveguide away from the straight input waveguide. Based on this asymmetric structure, calculated results show that the peak reflectivity of the intrawaveguide coupling is lower than 0.1 dB, while that of the contradirectional coupling is higher than 20 dB. An experimental result of 1.8 dB for the intrawaveguide coupling is obtained. A narrow drop-port bandwidth of 0.8 nm is also achieved experimentally.
Abstract-We design and fabricate a four-port wavelengthselective optical router on silicon-on-insulator wafer for photonic networks-on-chip. The router consists of four basic operation blocks. Each is constructed by one microring resonator (MRR) based add-drop filter rather than the traditional two microrings based 2 × 2 optical crossbar. It can provide multiwavelength routing for each path to increase the aggregate data transmission bandwidth. The possible 12 I/O routing paths are experimentally observed in the transmission spectra and each of them has the ability to route four group wavelengths simultaneously in the measured spectral range. The device has a small footprint (∼78 × 100 µm 2 ) and low power consumption (6.58 mW).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.