Ultra-broadband mid-infrared generation in dispersion-engineered thin-film lithium niobate
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...
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| Veröffentlicht in: | Optics express 2022-08, Vol.30 (18), p.32752-32760 |
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| creator | Mishra, Jatadhari Jankowski, Marc Hwang, Alexander Y Stokowski, Hubert S McKenna, Timothy P Langrock, Carsten Ng, Edwin Heydari, David Mabuchi, Hideo Safavi-Naeini, Amir H Fejer, M M |
| description | 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. |
| doi_str_mv | 10.1364/OE.467580 |
| format | Article |
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| subjects | OTHER INSTRUMENTATION |
| title | Ultra-broadband mid-infrared generation in dispersion-engineered thin-film lithium niobate |
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