Self-referenced photonic chip soliton Kerr frequency comb  

作　　者：Victor Brasch Erwan Lucas John D Jost Michael Geiselmann Tobias J Kippenberg 

机构地区：[1]École Polytechnique Fédérale de Lausanne(EPFL)–IPHYS,Lausanne CH-1015,Switzerland

出　　处：《Light(Science & Applications)》2016年第1期282-287,共6页光（科学与应用)（英文版）

基　　金：supported by the European Space Agency(ESA)contract ESTEC CN 4000108280/12/NL/PA;the Defense Advanced Research Projects Agency(DARPA)contract W911NF-11-1-0202(QuASAR);the Swiss National Science Foundation;supported by the Air Force Office of Scientific Research,Air Force Material Command,under award FA9550-15-1-0099;support from the ESA via contract ESTEC CN 4000105962/12/NL/PA;support by the Marie Curie IIF Fellowship;support from the Hasler foundation and support from the‘EPFL Fellows’fellowship program co-funded by Marie Curie,FP7 Grant agreement no.291771。

摘　　要：Self-referencing turns pulsed laser systems into self-referenced frequency combs.Such frequency combs allow counting of optical frequencies and have a wide range of applications.The required optical bandwidth to implement self-referencing is typically obtained via nonlinear broadening in optical fibers.Recent advances in the field of Kerr frequency combs have provided a path toward the development of compact frequency comb sources that provide broadband frequency combs,exhibit microwave repetition rates and are compatible with on-chip photonic integration.These devices have the potential to significantly expand the use of frequency combs.Yet to date,self-referencing of such Kerr frequency combs has only been attained by applying conventional,fiber-based broadening techniques.Here we demonstrate external broadening-free self-referencing of a Kerr frequency comb.An optical spectrum spanning two-thirds of an octave is directly synthesized from a continuous wave laser-driven silicon nitride microresonator using temporal dissipative Kerr soliton formation and soliton Cherenkov radiation.Using this coherent bandwidth and two continuous wave transfer lasers in a 2f–3f self-referencing scheme,we are able to detect the offset frequency of the soliton Kerr frequency comb.By stabilizing the repetition rate to a radio frequency reference,the self-referenced frequency comb is used to count and track the continuous wave pump laser’s frequency.This work demonstrates the principal ability of soliton Kerr frequency combs to provide microwave-to-optical clockworks on a chip.

关 键 词：frequency combs integrated optics Kerr frequency combs METROLOGY microresonator frequency combs nonlinear optics 

分 类 号：TN2[电子电信—物理电子学]