Observation of Brillouin dynamic grating in a photonic chip
We report demonstration of a Brillouin dynamic grating (BDG) in a photonic chip. A BDG was characterized in a 6.5 cm long chalcogenide (As₂S₃) rib waveguide using CW pumps in x polarization and read using a CW probe in y polarization. The measured reflectivity, on-off ratio, and 3 dB bandwidth (f₃dB) for the BDG were 0.4%, ~28 dB, and ~6 GHz, respectively.
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