Abstract
A heterogeneously integrated InP-on-silicon fast tunable filtered feedback laser is demonstrated. The laser device consists of a main Fabry-Pérot cavity connected to an integrated arrayed waveguide grating of which the outputs form external cavities in which semiconductor optical amplifiers can be switched to provide single-mode operation and tunability. The laser can operate at four different wavelengths whereby switching between each wavelength channel is done within one nanosecond. For each wavelength channel 12.5 Gbit/s NRZ-OOK direct modulation is demonstrated. The combination of fast wavelength switching with straightforward wavelength control and high-speed direct modulation characteristics make the demonstrated laser structure very attractive for use in optical packet or burst switching systems.
Highlights
Datacenter networks based on optical packet or burst switching are expected to become a reality in the near future [1]
We demonstrate for the first time sub-nanosecond fast wavelength switching with an arrayed waveguide grating (AWG-)based InP-on-silicon laser structure that uses the filtered feedback principle to achieve single-mode laser operation and tunability
The laser consists of a main Fabry-Pérot (FP) cavity with two partially reflective broadband silicon-on-insulator (SOI) distributed Bragg reflector (DBR) mirrors
Summary
Datacenter networks based on optical packet or burst switching are expected to become a reality in the near future [1] Envisioned implementations of such network architectures can make use of integrated nonlinear optical devices [2,3,4] but are typically based on passive wavelength routing devices and fast tunable lasers with tuning speeds on the order of several nanoseconds [5, 6]. Nanosecond fast wavelength tuning with high-speed direct modulation characteristics has not been demonstrated with heterogeneously integrated InP-on-silicon lasers. We demonstrate for the first time sub-nanosecond fast wavelength switching with an arrayed waveguide grating (AWG-)based InP-on-silicon laser structure that uses the filtered feedback principle to achieve single-mode laser operation and tunability.
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