Backward wave optical parametric oscillation in a waveguide

Backward wave optical parametric oscillation in a waveguide

Blog Article

Abstract Backward wave oscillators represent a class of tunable sources of electromagnetic radiation that do not require a resonant cavity to satisfy the oscillation condition.In the optical regime, the Backward Wave Optical Parametric Oscillator (BWOPO) relies on a a nonlinear interaction to provide the positive feedback required for oscillation, achieved through quasi-phase matching with sub-micron periods.The unique properties of the BWOPO have so Hinges far been shown in bulk crystals only, but the absence of an optical resonator makes the BWOPO naturally suitable for B Complex integration in a waveguide format.We demonstrate the first waveguide BWOPO, showcasing an oscillation threshold nearly 20 times lower than the corresponding bulk device, and exhibiting low loss (0.2 dB/cm).

The backward wave has a narrow linewidth of 21 GHz at 1514.6 nm, while the forward wave at 1688.7 nm has a broadband spectrum replicating that of the pump.A conversion efficiency of 8.4% was obtained.