铌酸锂
材料科学
宽带
红外线的
光学
光电子学
色散(光学)
蓝宝石
带宽(计算)
波长
和频产生
非线性光学
激光器
电信
物理
计算机科学
作者
Jatadhari Mishra,Marc Jankowski,Alexander Hwang,Hubert Stokowski,Timothy F. L. McKenna,Carsten Langrock,Edwin Ng,David Heydari,Hideo Mabuchi,Amir H. Safavi-Naeini,Martin M. Fejer
出处
期刊:Optics Express
[The Optical Society]
日期:2022-08-23
卷期号:30 (18): 32752-32752
被引量:6
摘要
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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