Offset-Free Gigahertz Midinfrared Frequency Comb Based on Optical Parametric Amplification in a Periodically Poled Lithium Niobate Waveguide

A. S. Mayer, C. R. Phillips, C. Langrock, A. Klenner, A. R. Johnson, K. Luke, Y. Okawachi, M. Lipson, A. L. Gaeta, M. M. Fejer, and U. Keller Department of Physics, Institute for Quantum Electronics, ETH Zurich, CH-8093 Zurich, Switzerland Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, USA Department of Electrical Engineering, Columbia University, New York, New York 10027, USA (Received 30 August 2016; revised manuscript received 18 October 2016; published 18 November 2016)