Kavli Affiliate: Alireza Marandi
| First 5 Authors: Luis Ledezma, Arkadev Roy, Luis Costa, Ryoto Sekine, Robert Gray
| Summary:
Widely-tunable coherent sources in nanophotonics are desirable for a
multitude of applications ranging from communications to sensing. The
mid-infrared spectral region (wavelengths beyond 2 $mu$m) is particularly
important for applications relying on molecular spectroscopy. Among tunable
sources, optical parametric oscillators typically offer some of the broadest
tuning ranges; however, their implementations in nanophotonics have been
limited to modest tuning ranges and only at visible and near-infrared
wavelengths. Here, we surpass these limits by demonstrating octave-spanning
tunable optical parametric oscillators in dispersion-engineered
periodically-poled lithium niobate nanophotonics. With a pump wavelength near 1
$mu$m, we generate output wavelengths tunable from 1.53 $mu$m to 3.25 $mu$m,
including common telecommunication bands and into the mid-infrared. Our results
enable opportunities for numerous integrated photonic applications requiring
compact tunable sources.
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