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LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G0900207 Design constraints and optimization for a white light cavity based GW interferometer including.

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Presentation on theme: "LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G0900207 Design constraints and optimization for a white light cavity based GW interferometer including."— Presentation transcript:

1 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Design constraints and optimization for a white light cavity based GW interferometer including power and signal recycling Selim Shahriar, Northwestern University Laboratory of Atomic and Photonic Technologies URL: Northwestern University Gravitational Wave Astrophysics Workgroup (Head: Vicky Kalogera) LIGO G

2 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G White Light Cavity: Basic Idea Negative Dispersion Medium Source Laser =2  C o /(n  ) Ideal WLC is infinitely broadened, without any drop in storage time / sensitivity In practice, broadening and sensitivity limited by finite bandwidth of negative dispersion Ideal WLC is also infinitely sensitive to variation in cavity length

3 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Active Superluminal Cavity: Superluminal Ring Laser (SRL) Gain Medium Neg Dispersion Medium Beat Signal Frequency change is enhanced in sensitivity by a factor of 10 million Beat note does not experience the broadening effect

4 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Demonstration of White Light Cavity

5 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G G.S. Pati, M. Messal, K. Salit, M.S. Shahriar, “Demonstration of a tunable-bandwidth white light interferometer using anomalous dispersion in atomic vapor,” Phys. Rev. Lett. 99, (2007) Demonstration of White Light Cavity

6 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G G.S. Pati, M. Messal, K. Salit, M.S. Shahriar, Optics Communications, 281 (19), p , (2008) Theory Experiment Demonstration of White Light Cavity

7 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G H.N. Yum, M. Salit, G.S. Pati, S. Tseng, P.R. Hemmer, and M.S.Shahriar, Optics Express, Vol. 16 Issue 25, (2008) Fast-light in Photorefractive Crystal for WLC

8 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Fast-light in Photorefractive Crystal for WLC

9 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Fast-light in Photorefractive Crystal for WLC

10 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Fast-light in Photorefractive Crystal for WLC

11 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Fast-light in Photorefractive Crystal for WLC

12 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Simple (Meers) Model for Signal and Power Recycling detector Power Recycling Mirror Signal Recycling Mirror NPBS

13 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Enhancing the bandwidth-sensitivity product Laser PRM SRM det Laser PRM SRM det WLC element

14 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Enhancing the bandwidth-sensitivity product

15 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Enhancing the bandwidth-sensitivity product No WLC / T SRM =1 No WLC / T SRM =0.1 No WLC / T SRM =0.001 WLC / T SRM =0.1 WLC / T SRM =0.001

16 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Signal and Power Recycling in the Presence of Arm Cavities

17 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G compound mirror for signal recycling compound mirror for signal recycling compound mirror for pump recycling compound mirror for pump recycling Signal and Power Recycling in the Presence of Arm Cavities

18 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G WLC element Sensitivity-Bandwidth Enhancement for AdLIGO Configuration

19 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G compound mirror for WLC signal recycling compound mirror for WLC signal recycling compound mirror for WLC pump recycling compound mirror for WLC pump recycling Signal Extraction Cavity (SEC) Signal Extraction Cavity (SEC) Sensitivity-Bandwidth Enhancement for AdLIGO Configuration

20 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Sensitivity-Bandwidth Enhancement for AdLIGO Configuration

21 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Tuned Mode Detuned by 54 deg Detuned by 36 deg Detuned by 25.2 deg Detuned by 20 deg Sensitivity-Bandwidth Enhancement for AdLIGO Configuration Without WLC With WLC

22 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Tuned Mode Detuned by 54 deg Detuned by 36 deg Detuned by 25.2 deg Detuned by 20 deg Without WLC With WLC Sensitivity-Bandwidth Enhancement for AdLIGO Configuration

23 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G compound mirror for pump recycling compound mirror for pump recycling Match SRM to Input Test Mass and tune SEC to resonance Proposal for Adding an Auxiliary Mirror for Practical WLC

24 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G compound mirror for pump recycling compound mirror for pump recycling WLC Element WLC Element WLC Element Proposal for Adding an Auxiliary Mirror for Practical WLC

25 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Proposal for Adding an Auxiliary Mirror for Practical WLC

26 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G No WLC / T ASRM =1 No WLC / T ASRM =0.1 No WLC / T ASRM =0.001 WLC / T ASRM =0.1 WLC / T ASRM =0.001 M. Salit and M.S. Shahriar, “Enhancement of Sensitivity-Bandwidth Product of Interferometric Gravitational Wave Detectors using White Light Cavities,” (http://arxiv.org/ftp/arxiv/papers/0809/ pdf) Proposal for Adding an Auxiliary Mirror for Practical WLC

27 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G Phase Shift Without Anomalous Dispersion Phase Shift With Anomalous Dispersion M.S. Shahriar and M. Salit, (2008) Journal of Modern Optics Vol. 55, Nos. 19–20, 10–20 November 2008, 3133–3147 M. S. Shahriar and M. Salit, “A Fast-Light Enhanced Zero-Area Sagnac Ring Laser Gravitational Wave Detector,” (http://lapt.eecs.northwestern.edu/preprints/FE-ZASRLGWD.pdf) Active Sagnac Ring Laser in a WLC for Enhancing Strain Sensitivity

28 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G G.S. Pati, M. Messal, K. Salit, M.S. Shahriar, Phys. Rev. Lett. 99, (2007) G.S. Pati, M. Messal, K. Salit, M.S. Shahriar, Optics Communications, 281 (19), p , (2008) G.S. Pati, R. Tripathi, V. Gopal, M. Messal, Phys. Rev. A 75, (2007) H.N. Yum, M. Salit, G.S. Pati, S. Tseng, P.R. Hemmer, and M.S.Shahriar, Optics Express, Vol. 16 Issue 25, (2008) M. Salit, G.S. Pati, K. Salit, and M.S. Shahriar, (2007) Journal of Modern Optics, 54:16, M.S. Shahriar and M. Salit, (2008) Journal of Modern Optics Vol. 55, Nos. 19–20, 10–20 November 2008, 3133–3147 M. S. Shahriar and M. Salit, “A Fast-Light Enhanced Zero-Area Sagnac Ring Laser Gravitational Wave Detector,” (http://lapt.eecs.northwestern.edu/preprints/FE- ZASRLGWD.pdf) M. Salit and M.S. Shahriar, “Enhancement of Sensitivity-Bandwidth Product of Interferometric Gravitational Wave Detectors using White Light Cavities,” (http://arxiv.org/ftp/arxiv/papers/0809/ pdf) Journal publications and preprints

29 LVC Meeting 2009: AIC Workgroup: Shahriar / LIGO G


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