Denker, T.; Schütte, D.; Wimmer, M.H.; Wheatley, T.A.; Huntington, E.H.; Heurs, M.: Utilizing weak pump depletion to stabilize squeezed vacuum states. In: Optics Express (2015), Nr. 13, S. 16517-16528. DOI:
https://doi.org/10.1364/OE.23.016517
Zusammenfassung: |
We propose and demonstrate a pump-phase locking technique that makes use of weak pump depletion (WPD) - an unavoidable effect that is usually neglected - in a sub-threshold optical parametric oscillator (OPO). We show that the phase difference between seed and pump beam is imprinted on both light fields by the non-linear interaction in the crystal and can be read out without disturbing the squeezed output. In our experimental setup we observe squeezing levels of 1.96±0.01 dB, with an anti-squeezing level of 3.78±0.02dB (for a 0.55mW seed beam at 1064nm and 67.8 mW of pump light at 532 nm). Our new locking technique allows for the first experimental realization of a pump-phase lock by reading out the pre-existing phase information in the pump field. There is no degradation of the detected squeezed states required to implement this scheme. © 2015 Optical Society of America.
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Lizenzbestimmungen: |
OSA Open Access Publishing Agreement - https://www.osapublishing.org/library/license_v1.cfm#VOR-OA
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2015 |
Schlagwörter (englisch): |
Optical parametric oscillators, Parametric oscillators, Experimental realizations, Locking technique, Nonlinear interactions, Phase difference, Phase information, Pump depletion, Squeezed state, Squeezed vacuum state, Locks (fasteners)
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Fachliche Zuordnung (DDC): |
530 | Physik
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