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arXiv · 2608.07241

Giant backward Brillouin interaction in generic InP integrated photonics

Riley te Morsche·Lukas Puts·Weiming Yao·David Marpaung
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Abstract

We report the first measurement of backward stimulated Brillouin scattering (SBS) in generic InP waveguides, supporting enhanced Brillouin gain of $g_B/Q_m = 3.5 \pm 0.6~\text{W}^{-1} \text{m}^{-1}$ mediated by weakly-guided pressure waves in InGaAsP. This leads to SBS gain coefficients as high as $737 \pm 54~\text{W}^{-1} \text{m}^{-1}$, observed in a mature, foundry-accessible photonic integration platform.

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Riley te Morsche, Lukas Puts, Weiming Yao, David Marpaung. 2026-08-07. Giant backward Brillouin interaction in generic InP integrated photonics. https://arxiv.org/abs/2608.07241

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