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LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon.

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Presentation on theme: "LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon."— Presentation transcript:

1 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon Chelkowski, Henning Vahlbruch, Boris Hage, Alexander Franzen, Nico Lastzka, Moritz Mehmet, Karsten Danzmann and Roman Schnabel Max-Planck-Institut für Gravitationsphysik Universität Hannover SFB 407 OPA squeezing frequency-dependent squeezing Influence of a cavity

2 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 2 OPA squeezing MgO:LiNbO 3 – crystal as nonlinear material strong interaction between seed- and pumpfield fractions in phase are amplified OPA squeezing frequency-dependent squeezing Influence of a cavity Parametric amplification

3 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 3 simple explanation of how to generate squeezing OPA squeezing frequency-dependent squeezing Influence of a cavity

4 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 4 detection of squeezing 50/50 beamsplitter signal amplification due to overlapping of a strong local oscillator phasesensitive measurement homodyne detection OPA squeezing frequency-dependent squeezing Influence of a cavity

5 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 5 squeezing spectrum amplitude squeezing at squeezed noise below vacuum noise dark noise vacuum noise Broardband squeezing up to ~30MHz Relaxiation oszillation OPA squeezing frequency-dependent squeezing Influence of a cavity

6 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 6 reflection at a cavity & quadrature picture amplitude quadrature phasen quadrature arbitrary Quadratur locked at OPA Squeezing frequency-dependent squeezing Influence of a cavity

7 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 7 reflection at a cavity & quadrature picture Influence of a detuned Cavity OPA squeezing frequency-dependent squeezing Influence of a cavity

8 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 8 creation of frequency-dependent squeezing PRA 71, 013806 (2005) OPA squeezing frequency-dependent squeezing Influence of a cavity

9 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 9 motivation of the experiment OPA squeezing frequency-dependent squeezing Influence of a cavity

10 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 10 creation of frequency-dependent squeezing PRA 71, 013806 (2005) OPA squeezing frequency-dependent squeezing Influence of a cavity

11 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 11 frequency-dependent squeezing PRA 71, 013806 (2005) OPA squeezing frequency-dependent squeezing Influence of a cavity

12 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 12 tomography of a squeezed state Contour Plot of a Wigner Function PRA 71, 013806 (2005) 14.1MHz OPA squeezing frequency-dependent squeezing Influence of a cavity

13 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 13 tomography of frequency-dependent squeezed light PRA 71, 013806 (2005) OPA squeezing frequency-dependent squeezing Influence of a cavity

14 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 14 evolution of the squeezing angle PRA 71, 013806 (2005) OPA squeezing frequency-dependent squeezing Influence of a cavity

15 LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 15 conclusion OPA Squeezing (non-linear process, MgO:LiNbO 3 -crystal) creation of frequency-dependent squeezing (reflection at a cavity) results (freq.dep. light, tomography of squeezed states) OPA squeezing frequency-dependent squeezing Influence of a cavity

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