Fig. 1: Heterogeneous integration of As2S3 waveguides and silicon components for an on-chip microwave photonic filter system. | Nature Communications

Fig. 1: Heterogeneous integration of As2S3 waveguides and silicon components for an on-chip microwave photonic filter system.

From: Integrated microwave photonic notch filter using a heterogeneously integrated Brillouin and active-silicon photonic circuit

Fig. 1

a High-level schematic of the integrated Si-As2S3 MWP notch filter. An RF input signal is modulated onto an optical carrier by a modulator on the Si-As2S3 chip. The modulated optical signal is then processed and undergoes photodetection. The notch filter response is visualised in the RF output spectrum where the spectral component at f1 is attenuated, whereas the signal at f2 is not. b A picture of the Si-As2S3 PIC containing (c) a silicon E-O modulator and circuits used for optical carrier control and (d) False-coloured optical microscope image of As2S3 spiral waveguides that are used for Brillouin processing. PIC Photonic integrated circuit, E-O Electro-optic, CSR Carrier-sideband-ratio, TC Tunable coupler, TPS Tunable phase shifter, VOA Variable optical attenuator.

Back to article page