AI Article Synopsis
- Thin-film lithium niobate (TFLN) is gaining traction for its compact, low-power nonlinear-optical devices, particularly for applications in the near-infrared and now in the mid-infrared wavelengths for chemical sensing.
- Recent advancements have demonstrated efficient and wide-ranging difference frequency generation using a fixed 1-µm pump and a tunable telecom source in TFLN-on-sapphire, thanks to improved waveguide designs.
- The study reveals significant improvements, showing a 1-2 order-of-magnitude boost in conversion efficiency and about a 5-fold increase in bandwidth compared to traditional lithium niobate waveguides, while also addressing mid-infrared losses due to surface-adsorbed water
Article Abstract
Thin-film lithium niobate (TFLN) is an emerging platform for compact, low-power nonlinear-optical devices, and has been used extensively for near-infrared frequency conversion. Recent work has extended these devices to mid-infrared wavelengths, where broadly tunable sources may be used for chemical sensing. To this end, we demonstrate efficient and broadband difference frequency generation between a fixed 1-µm pump and a tunable telecom source in uniformly-poled TFLN-on-sapphire by harnessing the dispersion-engineering available in tightly-confining waveguides. We show a simultaneous 1-2 order-of-magnitude improvement in conversion efficiency and ∼5-fold enhancement of operating bandwidth for mid-infrared generation when compared to equal-length conventional lithium niobate waveguides. We also examine the effects of mid-infrared loss from surface-adsorbed water on the performance of these devices.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9576285 | PMC |
| http://dx.doi.org/10.1364/OE.467580 | DOI Listing |
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