![Page 1: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/1.jpg)
1LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
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 squeezingInfluence of a cavity
![Page 2: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/2.jpg)
2LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
OPA squeezing
• MgO:LiNbO3 – crystal as nonlinear material
• strong interaction between seed- and pumpfield
• fractions in phase are amplified
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
Parametric amplification
![Page 3: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/3.jpg)
3LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
simple explanation of how to generate squeezing
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 4: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/4.jpg)
4LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
detection of squeezing
• 50/50 beamsplitter
• signal amplification due to overlapping of a strong local oscillator• phasesensitive measurement
homodyne detection
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 5: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/5.jpg)
5LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
squeezing spectrum
• amplitude squeezing at
• squeezed noise
below vacuum noisedark noise
vacuum noise
Broardband squeezing up to ~30MHz
Relaxiation oszillation
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 6: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/6.jpg)
6LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
reflection at a cavity & quadrature picture
amplitude quadrature
phasen quadraturearbitrary Quadratur
locked at
OPA Squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 7: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/7.jpg)
7LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
reflection at a cavity & quadrature picture
Influence of a detuned Cavity
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 8: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/8.jpg)
8LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
creation of frequency-dependent squeezing
PRA 71, 013806 (2005)
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 9: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/9.jpg)
9LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
motivation of the experiment
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 10: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/10.jpg)
10LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
creation of frequency-dependent squeezing
PRA 71, 013806 (2005)
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 11: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/11.jpg)
11LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
frequency-dependent squeezing
PRA 71, 013806 (2005)
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 12: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/12.jpg)
12LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
tomography of a squeezed state
Contour Plot of a Wigner Function
PRA 71, 013806 (2005)
14.1MHz
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 13: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/13.jpg)
13LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
tomography of frequency-dependent squeezed light
PRA 71, 013806 (2005)
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 14: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/14.jpg)
14LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
evolution of the squeezing angle
PRA 71, 013806 (2005)
OPA squeezing
frequency-dependent squeezingInfluence of a cavity
![Page 15: LSC 03/2005 LIGO-G050166-00-Z S. Chelkowskicharacterization of squeezed states 1 Experimental characterization of frequency-dependent squeezed light Simon](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649eeb5503460f94bfcd92/html5/thumbnails/15.jpg)
15LSC 03/2005 LIGO-G050166-00-Z S. Chelkowski characterization of squeezed states
conclusion
OPA Squeezing (non-linear process, MgO:LiNbO3-crystal)
creation of frequency-dependent squeezing
(reflection at a cavity)
results(freq.dep. light, tomography of squeezed states)
OPA squeezing
frequency-dependent squeezingInfluence of a cavity