2020/05/07 by Linbo Shao, Neil Sinclair, James Leatham +6 · 95 citations
Physics and Astronomy · #Advanced Fiber Laser Technologies #Bandwidth (computing) #Broadband #Frequency modulation #Frequency response #Lithium niobate #Microwave #Optical and Acousto-Optic Technologies #Optical communication #Optical fiber #Phase shift module #Photorefractive and Nonlinear Optics #Radio frequency #physics.app-ph #physics.optics
paper · pdf · open access · doi:10.1364/oe.397138
published in Optics Express 28(16), 23728 (Optica Publishing Group)
arxiv created 2020/05/07 · openalex publication_date 2020/07/20 · arxiv updated 2020/07/29 · openalex created_date 2020/07/29 · openalex updated_date 2026/08/06
Electrically driven acousto-optic devices that provide beam deflection and optical frequency shifting have broad applications from pulse synthesis to heterodyne detection. Commercially available acousto-optic modulators are based on bulk materials and consume Watts of radio frequency power. Here, we demonstrate an integrated 3-GHz acousto-optic frequency shifter on thin-film lithium niobate, featuring a carrier suppression over 30 dB. Further, we demonstrate a gigahertz-spaced optical frequency comb featuring more than 200 lines over a 0.6-THz optical bandwidth by recirculating the light in an active frequency shifting loop. Our integrated acousto-optic platform leads to the development of on-chip optical routing, isolation, and microwave signal processing.