Broadband and efficient adiabatic three-wave-mixing in a temperature-controlled bulk crystal

Optics Express
Andrey MarkovRoberto Morandotti

Abstract

Nonlinear interactions are commonly used to access to wavelengths not covered by standard laser systems. In particular, optical parametric amplification (OPA) is a powerful technique to produce broadly tunable light. However, common implementations of OPA suffer from a well-known trade-off, either achieving high efficiency for narrow spectra or inefficient conversion over a broad bandwidth. This shortcoming can be addressed using adiabatic processes. Here, we demonstrate a novel technique towards this direction, based on a temperature-controlled phase mismatch between the interacting waves. Using this approach, we demonstrate, by tailoring the temperature profile, an increase in conversion efficiency by 21%, reaching a maximum of 57%, while simultaneously expanding the bandwidth to over 300 nm. Our technique can readily enhance the performances of current OPA systems.

References

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Citations

Nov 25, 2018·Optics Express·Eyal BaharJeffrey Moses
May 2, 2020·Physical Review Letters·Xiaoyue DingJeffrey Moses

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