Fig. 3: Characterisation of the As2S3 Brillouin waveguides. | Nature Communications

Fig. 3: Characterisation of the As2S3 Brillouin waveguides.

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

Fig. 3

a Simplified setup for the optical measurement of Brillouin gain. b Measured Brillouin gain and loss response. c Simplified setup of the electronic measurement of Brillouin gain. d The shaded trace represents the measured SBS response in the As2S3 waveguides for different coupled pump powers (P). The solid line represents the Lorentzian fit. e Measured SBS gain as a function of pump power. OSA Optical Spectrum Analyser (APEX AP2083A), VNA Vector Network Analyser (Agilent PNA N5224A), PD Photodetector, EDFA Erbium-doped fibre amplifier, DDMZM Dual-drive Mach-Zehnder modulator. The Brillouin frequency shift is indicated by ΩB.

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