Applied Physics B

, Volume 55, Issue 3, pp 216–225

Squeezing by second-harmonic generation in a monolithic resonator

  • P. Kürz
  • R. Paschotta
  • K. Fiedler
  • A. Sizmann
  • G. Leuchs
  • J. Mlynek
Generation of CW Squeezed Light


We have measured the intensity fluctuations of the second-harmonic mode generated in a MgO:LiNbO3 external monolithic cavity pumped by a Nd:YAG laser. The cavity has mirror coatings for both the fundamental and the second-harmonic mode. We scan the cavity using the electro-optic effect of the crystal and observe that the second-harmonic beam of 2 mW exhibits a quantum noise reduction of 40(±5)%. In addition, we report on the active frequency stabilization of the monolithic device used in our squeezing experiments. Several fast tuning parameters such as the electro-optic effect, the photo-elastic effect, and the laser frequency have been investigated. With these tuning parameters the monolithic resonator can be locked on double-resonance at the phase-matching temperature, which is a prerequisit for observing squeezing in a cw-regime.


42.50.Dv 42.65.Ky 


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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • P. Kürz
    • 1
  • R. Paschotta
    • 1
  • K. Fiedler
    • 1
  • A. Sizmann
    • 1
  • G. Leuchs
    • 1
  • J. Mlynek
    • 1
  1. 1.Universität KonstanzKonstanzFed. Rep. Germany
  2. 2.Laboratoire de Spectroscopie Hertzienne de l'Ecole Normale SupérieureUniversité Pierre et Marie CurieParis Cédex 05France
  3. 3.Buchs 1 (SG)Switzerland

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