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Figure 31

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(a) Sketch of the microsphere with a flake of graphene placed at 30° angle from the equatorial plane. The hybrid WGMR is pumped by an external cavity diode laser (ECDL) that excites soliton combs, which belong to distinct mode families. Adapted from [146]. (b) Sketch of the Brillouin lasing device used for gas detection. BLs: Brillouin laser, PL: pump laser, Gr: Graphene. Adapted from [15].

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