论文信息 - Ultrafast all‐optical switching in GaAlAs directional couplers at 1.55 μm without multiphoton absorption

Ultrafast all‐optical switching in GaAlAs directional couplers at 1.55 μm without multiphoton absorption

We demonstrate ultrafast, high throughput, all‐optical switching in optimized, 2‐cm‐long, half‐ and full‐beat‐length nonlinear directional couplers operated at 1.55 μm, below half the band gap of Ga0.82Al0.18As. The long device length allowed the elimination of nonlinear loss and resulted in a switching peak power and energy of 85 W and 65 pJ, respectively.

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