Generation of broadband squeezed states pumped by CW mode-locked pulses |
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Authors: | T. Hirano M. Matsuoka |
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Affiliation: | (1) Institute for Solid State Physics, University of Tokyo, Roppongi 7-22-1, Minatoku, 106 Tokyo, Japan |
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Abstract: | Broadband high level squeezing was clearly observed from 100 kHz to 80 MHz using crystals Ba2NaNb5O15 of 5 mm length, MgO:LiNbO3 of 19 mm length and KNbO3 of 5.8 mm length. Maximum noise reductions detected on a spectrum analyzer were –1.2 dB (–24%), –1.25 dB (–25%), and –1.8 dB (–34%) for the three crystals, respectively. The maximum squeezing is limited mostly by optical index damage of the parametric crystals. A detailed analysis of the beam parameters traced along the pump beam, squeezed vacuum, etc. is given. A detailed discussion on the evaluation of the initial squeezed level is given. A preliminary experiment with compressed laser pulses to avoid the optical damage is also described. |
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Keywords: | 42.50.Dv 42.50.Lc 42.65.Ky |
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