Supermode-based second harmonic generation in a nonlinear interferometer

Abstract

We demonstrate supermode-based second harmonic generation in an integrated nonlinear interferometer made of linear and nonlinear directional couplers. We use a fully-fibered pump shaper to demonstrate second harmonic generation pumped by the symmetric or anti-symmetric fundamental spatial modes. The selection of the pumping mode and thus of a specific SHG spectral profile is achieved through the selection of the fundamental wavelength and via a robust phase setting scheme. We use two methods: either post-selecting or actively setting the pumping mode. Such a modal phase matching paves the way for classical and quantum applications of coupled nonlinear photonic circuits, where multimode excitation, encoding and detection are a route for multiplexing and scaling up light-processing.

14 pages, 7 figures

References in corpus (5)

• Continuous-wave 6-dB-squeezed light with 2.5-THz-bandwidth from single-mode PPLN waveguide
• Generalized approach for enabling multimode quantum optics
• Quantum state engineering in arrays of nonlinear waveguides
• Continuous-variable entanglement of two bright coherent states that never interacted
• Symmetry-based analytical solutions to the χ^{(2)} nonlinear directional coupler

Cited by in corpus (1)

• Continuous-variable spatio-spectral quantum networks in nonlinear photonic lattices