Widely tunable coherent sources are desirable in nanophotonics for a multitude of applications ranging from communications to sensing. The mid-infrared spectral region (wavelengths beyond 2 μm) 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 narrow tuning ranges in the infrared or to visible wavelengths. Here, we surpass these limits in dispersion-engineered periodically poled lithium niobate nanophotonics and demonstrate ultrawidely tunable optical parametric oscillators. Using 100 ns pulses near 1 μm, we generate output wavelengths tunable from 1.53 μm to 3.25 μm in a single chip with output powers as high as tens of milliwatts. Our results represent the first octave-spanning tunable source in nanophotonics extending into the mid-infrared, which can be useful for numerous integrated photonic applications.
- Award ID(s):
- 1953803
- PAR ID:
- 10329503
- Date Published:
- Journal Name:
- ACS applied materials interfaces
- Volume:
- 13
- Issue:
- 41
- ISSN:
- 1944-8252
- Page Range / eLocation ID:
- 48981-48987
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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