Applied Physics B

, Volume 56, Issue 2, pp 65–70 | Cite as

Phase-matched electrooptic modulator at 84 GHz for blue light: Theory, experimental test and applications

  • D. Leibfried
  • F. Schmidt-Kaler
  • M. Weitz
  • T. W. Hänsch


We describe the theory and experimental realization of an ultrafast phase-matched electrooptic modulator, working with 486 nm light and a modulation frequency of 84 GHz. To achieve phase matching for arbitrarily high modulation frequencies the laser beam is guided with several internal total reflections along a zig-zag path through a LiTaO3 crystal. The method was studied experimentally with a 84 GHz modulator and a highly stable 486 nm dye laser. The maximum modulation index of this setup was about 5.0%. Beat signals between either the first- or the second-order sidebands and another laser were observed. This modulator was used to directly measure the 671 GHz 1S–2S isotope shift of hydrogen and deuterium with radio-frequency accuracy.


42.79.Hp 06.30.Ft 35.80.+s 


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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • D. Leibfried
    • 1
  • F. Schmidt-Kaler
    • 1
  • M. Weitz
    • 1
  • T. W. Hänsch
    • 1
  1. 1.Max-Planck-Institut für QuantenoptikGarchingGermany

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