Squeezing on H1

We propose to inject squeezed light into the Hanford 4 km interferometer to improve its sensitivity by 3 dB in the frequency band dominated by shot noise. At the LIGO Hanford Observatory there are about six months between the end of the 6^{th} science run and the beginning of installation for advanced LIGO. We propose to use this time frame to install a squeezed light source and validate the concept of gravitational wave detection below the standard quantum limit.

Advanced LIGO demands very high power levels in the long Michelson arms. Close to a mega Watt of laser light has to be stored in the arm cavities in order to reach the sensitivity goal. This will be challenging. Optical waveform distortion due to absorption and the excitation of parasitic instabilities both have the risk to limit the maximum arm cavity power. Using non-classical light states have the potential to achieve similar performance with less power. We see this proposal as an important step to mitigate the technical risk associated with high power operations in advanced LIGO.

The technology to generate squeezed vacuum states has progressed quickly over the past few years. A suitable light source which generates squeezing down to 10 Hz has recently been demonstrated. Interferometric detectors have been squeezed before—however, no experiment was performed at frequencies or sensitivities directly relevant for future detectors.


People involved

Ping Koy Lam^3, Nergis Mavalvala^2, David McClelland^3, Roman Schnabel^4, Daniel Sigg^1, Henning Vahlbruch^4 and Stan Whitcomb^5 (so far)

  1. LIGO Hanford Observatory, Richland, WA
  2. LIGO Laboratory, Massachusetts Institute of Technology
  3. Gravitational Physics Group, Australian National University
  4. Max-Planck-Institut für Gravitationsphysik, Leibniz Universität Hannover
  5. LIGO Laboratory, California Institute of Technology


H1 Proposal

H1 Proposal (revision D )

T070265-D

H1 Proposal (revision C )

T070265-C

H1 Proposal (revision B )

T070265-B

H1 Proposal (revision A )

T070265-A

Presentation at the LIGO-VIRGO meeting (March 2008)

G080091-00

Slides from the LIGO-VIRGO meeting (June 2008)

G080334-00

G080335-00

Presentation at the LIGO-VIRGO meeting (March 2009)

G0900098-v1

Presentation at the 8th Amaldi meeting (June 2009)

G0900538-v1

G0900518-v1

Presentation at the LIGO-VIRGO meeting (September 2009)

G0900849-v1

List of technical issues

Technical

Optical layout

Layout

Electronics setup

Electronics

Budget

M080339-00

Revised budget with caveat

M080339-01

Schedule

M080340-00

Intermediate milestones

Milestones.txt


Proposal Review

Review committee: Yanbei Chen, Eric Gustafson, Seiji Kawamura, Guido Mueller, Fred Raab (chair), Alan Weinstein, Rai Weiss and Mike Zucker

Date: Tuesday, Aug 19, 2008
Time: 21:00 UTC (11pm in Central Europe; 5pm Boston; 2 pm Seattle; 6am Wed in Tokyo; 7am Wed in Canberra)

Date: Thursday, January 15, 2009
Time: 23:00 UTC (12pm in Central Europe; 6pm Boston; 3 pm Seattle; 8am Fri in Tokyo; 10am Fri in Canberra)

Documents:

Charge

Committee Charge

H1 Proposal (revision C )

T070265-C

Budget

M080339-00

Revised budget

M080339-01

Schedule

M080340-00

Viewgraphs

G080417-00

Viewgraphs (2nd meeting)

G0900019-v1

Report technical review

L080140-00

Answers to action items

L080130-00

Report budget/schedule review

M0900042-v1


Squeezer Update Review

Review committee: Yanbei Chen, Eric Gustafson, Seiji Kawamura, Guido Mueller, Fred Raab (chair), Alan Weinstein, Rai Weiss and Mike Zucker

Date: Tuesday, Aug 25, 2009
Time: 21:00 UTC (11pm in Central Europe; 5pm Boston; 2 pm Seattle; 6am Wed in Tokyo; 7am Wed in Canberra)

Documents:

Charge

Noise and servo model
Budget for next year

Noise Model Document (pdf)

T0900325-v1

Servo Diagram

T0900325-v1 Diagram

Simulink Model

T0900325-v1 Simulink

Presentation

G0900746-v1


Meetings

Kick-off meeting on 4/1/2008

Agenda and Meeting Notes

Review kick-off meeting on 4/23/2008

Meeting Notes

Meeting on 5/7/2008

Agenda and Meeting Notes

Meeting on 6/3/2008

Agenda and Meeting Notes

Meeting on 7/2/2008

Agenda and Meeting Notes

Meeting on 7/23/2008

Agenda and Meeting Notes

Meeting on 8/6/2008

Agenda and Meeting Notes

Meeting on 10/22/2008

Agenda and Meeting Notes

Meeting on 4/8/2009

Agenda and Meeting Notes

Meeting on 8/12/2009

Agenda

Meeting on 10/22/2009

Agenda and Meeting Notes

Dialing Instructions (Accu Conference):

  1. At the specified time, dial the Access Number 1.800.704.9896 (direct 1.404.920.6472)
  2. When prompted, enter your Participant Code followed by #.
  3. Your Participant Code is 79424444.

Participant Star Commands
*4-Volume - Pressing *4 will increase/decrease the volume.
*6-Mute - Participants can mute/unmute their own lines by pressing *6.


Mailing List

A mail list has been set up here. This mail list is dedicated to topics about the LIGO squeezer experiment. All old emails are available in the archive. This email list is open to any member of the LIGO Scientific Collaboration.


Supporting Material

ANU OPO Cavity Parameters

ANU OPO Cavity Parameters

Block Diagram Draft

Block Diagram Draft

SqWiki: H1Squeezer (last edited 2009-11-17 17:13:00 by DanielSigg)