Squeezing by second-harmonic generation in a monolithic resonator |
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| Authors: | P Kürz R Paschotta K Fiedler A Sizmann G Leuchs J Mlynek |
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| Institution: | (1) Universität Konstanz, P.O.B. 5560, W-7750 Konstanz, Fed. Rep. Germany;(2) Present address: Laboratoire de Spectroscopie Hertzienne de l'Ecole Normale Supérieure, Université Pierre et Marie Curie, F-75252 Paris Cédex 05, France;(3) Present address: Nanomach AG, Bahnhofsstrasse 35, CH-9470 Buchs 1 (SG), Switzerland |
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| Abstract: | 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. |
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| Keywords: | 42 50 Dv 42 65 Ky |
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