---
res:
  bibo_abstract:
  - 'High-speed optical telecommunication is enabled by wavelength-division multiplexing,
    whereby hundreds of individually stabilized lasers encode information within a
    single-mode optical fibre. Higher bandwidths require higher total optical power,
    but the power sent into the fibre is limited by optical nonlinearities within
    the fibre, and energy consumption by the light sources starts to become a substantial
    cost factor1. Optical frequency combs have been suggested to remedy this problem
    by generating numerous discrete, equidistant laser lines within a monolithic device;
    however, at present their stability and coherence allow them to operate only within
    small parameter ranges2,3,4. Here we show that a broadband frequency comb realized
    through the electro-optic effect within a high-quality whispering-gallery-mode
    resonator can operate at low microwave and optical powers. Unlike the usual third-order
    Kerr nonlinear optical frequency combs, our combs rely on the second-order nonlinear
    effect, which is much more efficient. Our result uses a fixed microwave signal
    that is mixed with an optical-pump signal to generate a coherent frequency comb
    with a precisely determined carrier separation. The resonant enhancement enables
    us to work with microwave powers that are three orders of magnitude lower than
    those in commercially available devices. We emphasize the practical relevance
    of our results to high rates of data communication. To circumvent the limitations
    imposed by nonlinear effects in optical communication fibres, one has to solve
    two problems: to provide a compact and fully integrated, yet high-quality and
    coherent, frequency comb generator; and to calculate nonlinear signal propagation
    in real time5. We report a solution to the first problem.@eng'
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Alfredo R
      foaf_name: Rueda Sanchez, Alfredo R
      foaf_surname: Rueda Sanchez
      foaf_workInfoHomepage: http://www.librecat.org/personId=3B82B0F8-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0001-6249-5860
  - foaf_Person:
      foaf_givenName: Florian
      foaf_name: Sedlmeir, Florian
      foaf_surname: Sedlmeir
  - foaf_Person:
      foaf_givenName: Madhuri
      foaf_name: Kumari, Madhuri
      foaf_surname: Kumari
  - foaf_Person:
      foaf_givenName: Gerd
      foaf_name: Leuchs, Gerd
      foaf_surname: Leuchs
  - foaf_Person:
      foaf_givenName: Harald G.L.
      foaf_name: Schwefel, Harald G.L.
      foaf_surname: Schwefel
  bibo_doi: 10.1038/s41586-019-1110-x
  bibo_issue: '7752'
  bibo_volume: 568
  dct_date: 2019^xs_gYear
  dct_identifier:
  - UT:000464950700053
  dct_isPartOf:
  - http://id.crossref.org/issn/0028-0836
  - http://id.crossref.org/issn/1476-4687
  dct_language: eng
  dct_publisher: Springer Nature@
  dct_title: Resonant electro-optic frequency comb@
...