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High-efficiency and broadband electro-optic frequency combs enabled by coupled micro-resonators

Hu, Yaowen and Yu, Mengjie and Buscaino, Brandon and Sinclair, Neil and Zhu, Di and Cheng, Rebecca and Shams-Ansari, Amirhassan and Shao, Linbo and Zhang, Mian and Kahn, Joseph M. and Lončar, Marko (2021) High-efficiency and broadband electro-optic frequency combs enabled by coupled micro-resonators. . (Unpublished)

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Developments in integrated photonics have led to stable, compact, and broadband comb generators that support a wide range of applications. Current on-chip comb generators, however, are still limited by low optical pump-to-comb conversion efficiencies. Here, we demonstrate an integrated electro-optic frequency comb with a conversion efficiency of 30% and an optical bandwidth of 132 nm, featuring a 100-times higher conversion efficiency and 2.2-times broader optical bandwidth compared with previous state-of-the-art integrated electro-optic combs. We further show that, enabled by the high efficiency, the device acts as an on-chip femtosecond pulse source (336 fs pulse duration), which is important for applications in nonlinear optics, sensing, and computing. As an example, in the ultra-fast and high-power regime, we demonstrate the observation of a combined EO-χ⁽³⁾ nonlinear frequency comb. Our device paves the way for practical optical frequency comb generators enabling energy-efficient computing, communication, and metrology, and provides a platform to investigate new regimes of optical physics that simultaneously involve multiple nonlinearities.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Hu, Yaowen0000-0002-0127-1959
Yu, Mengjie0000-0002-7815-4195
Buscaino, Brandon0000-0002-8662-1160
Zhu, Di0000-0003-0210-1860
Shams-Ansari, Amirhassan0000-0002-2165-7832
Shao, Linbo0000-0002-0615-7848
Zhang, Mian0000-0001-9838-3895
Lončar, Marko0000-0002-5029-5017
Additional Information:We thank Cheng Wang for helpful discussion. This work is supported by AFOSR grants FA9550-19-1-0376 and FA9550-19-1-0310, DARPA LUMOS HR0011-20-C-137, NASA 80NSSC21C0583, AFRL FA9550-21-1-0056, NSF ECCS-1839197, ARO W911NF2010248, DOE DE-SC0020376, Harvard Quantum Initiative, Facebook, Maxim Integrated (now Analog Devices), Inphi (now Marvell) and National Science Foundation under Grant ECCS-1740291 E2CDA. Device fabrication was performed at the Harvard University Center for Nanoscale Systems. Competing interests: M.Z. and M.L. are involved in developing lithium niobate technologies at HyperLight Corporation. The views, opinions and/or findings expressed are those of the author and should not be interpreted as representing the official views or policies of the Department of Defense or the U.S. Government.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-19-1-0376
Air Force Office of Scientific Research (AFOSR)FA9550-19-1-0310
Defense Advanced Research Projects Agency (DARPA)HR0011-20-C-137
Air Force Research Laboratory (AFRL)FA9550-21-1-0056
Army Research Office (ARO)W911NF2010248
Department of Energy (DOE)DE-SC0020376
Harvard Quantum InitiativeUNSPECIFIED
Maxim IntegratedUNSPECIFIED
Record Number:CaltechAUTHORS:20220613-175653469
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115136
Deposited By: George Porter
Deposited On:13 Jun 2022 18:39
Last Modified:14 Jun 2022 15:12

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