Ultra-Fast Continuous Wavelength Sweep in III-V-on-SOI MOSCAP DFB Lasers

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Abstract
We demonstrate an ultra-fast athermal continuous wavelength-swept III-V-on-SOI MOSCAP DFB laser with a mode-hop-free-tuning up to 10 GHz in less than 2 ns. We also propose a new method to linearize the frequency response without any pre-distortion or active feedback in the gain’s current injection ramp. Instead, we polarize the III-V gain section under direct current injection, and we drive the hybrid MOSCAP waveguide with an AC voltage signal. By optimizing its driving frequency, we demonstrate an ultra-fast athermal triangular-shaped time-varying frequency tuning with a speed of 4×10 4 PHz/s and a laser’s frequency excursion of 4 GHz.
Funding Information
  • European Union Horizon H2020 Program (H2020-ICT-2017-1)
  • Agreement PICTURE (n.780930)

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