Efficient and tunable blue light generation using lithium niobate nonlinear photonics

Abstract

Thin film lithium niobate (LN) has recently emerged as a playground for chip-scale nonlinear optics and leads to highly efficient frequency conversions from near infrared to near-visible bands. For many nonlinear and quantum photonics applications, it is desirable to operate deep into the visible band within LN's transparency window. However, the strong material dispersion at short wavelengths makes phase-matching difficult, necessitating sub-micron scale control of domain structures for efficient quasi-phase-matching (QPM). Here we report the operation of thin film LN in the blue wavelength and high fidelity poling of thin-film LN waveguide to this regime. As a result, quasi-phase matching is realized between IR (871nm) and blue (435.5nm) wavelengths in a straight waveguide and prompts strong blue light generation with a conversion efficiency $2900\pm 400\%W^{-1}c{m}^{-2}$

arXiv comment5 Pages, 2 figures

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Cited by in corpus (4)

• High efficiency second harmonic generation of blue light on thin film lithium niobate
• Ultraviolet astronomical spectrograph calibration with laser frequency combs from nanophotonic lithium niobate waveguides
• Tunable and efficient ultraviolet generation in nanophotonic lithium niobate
• Highly efficient visible and near-IR photon pair generation with thin-film lithium niobate