Abstract
Interferometric gravitational-wave detectors are complex instruments comprised of a Michelson interferometer enhanced by multiple coupled cavities. Active feedback control is required to operate these instruments and keep the cavities locked on resonance. The optical response is highly nonlinear until a good operating point is reached. The linear operating range is between 0.01% and 1% of a fringe for each degree of freedom. The resonance lock has to be achieved in all five degrees of freedom simultaneously, making the acquisition difficult. Furthermore, the cavity linewidth seen by the laser is only ~1 Hz, which is four orders of magnitude smaller than the linewidth of the free running laser. The arm length stabilization system is a new technique used for arm cavity locking in Advanced LIGO. Together with a modulation technique utilizing third harmonics to lock the central Michelson interferometer, the Advanced LIGO detector has been successfully locked and brought to an operating point where detecting gravitational-waves becomes feasible.
| Original language | English (US) |
|---|---|
| Article number | 245010 |
| Journal | Classical and Quantum Gravity |
| Volume | 31 |
| Issue number | 24 |
| DOIs | |
| State | Published - Dec 21 2014 |
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Keywords
- Gravitational-wave detector
- Interferometer
- LIGO
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Achieving resonance in the Advanced LIGO gravitational-wave interferometer. / Staley, A.; Martynov, D.; Abbott, R.; Adhikari, R. X.; Arai, K.; Ballmer, Stefan; Barsotti, L.; Brooks, A. F.; Derosa, R. T.; Dwyer, S.; Effler, A.; Evans, M.; Fritschel, P.; Frolov, V. V.; Gray, C.; Guido, C. J.; Gustafson, R.; Heintze, M.; Hoak, D.; Izumi, K.; Kawabe, K.; King, E. J.; Kissel, J. S.; Kokeyama, K.; Landry, M.; McClelland, D. E.; Miller, J.; Mullavey, A.; Oreilly, B.; Rollins, J. G.; Sanders, J. R.; Schofield, R. M S; Sigg, D.; Slagmolen, B. J J; Smith-Lefebvre, N. D.; Vajente, G.; Ward, R. L.; Wipf, C.
In: Classical and Quantum Gravity, Vol. 31, No. 24, 245010, 21.12.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Achieving resonance in the Advanced LIGO gravitational-wave interferometer
AU - Staley, A.
AU - Martynov, D.
AU - Abbott, R.
AU - Adhikari, R. X.
AU - Arai, K.
AU - Ballmer, Stefan
AU - Barsotti, L.
AU - Brooks, A. F.
AU - Derosa, R. T.
AU - Dwyer, S.
AU - Effler, A.
AU - Evans, M.
AU - Fritschel, P.
AU - Frolov, V. V.
AU - Gray, C.
AU - Guido, C. J.
AU - Gustafson, R.
AU - Heintze, M.
AU - Hoak, D.
AU - Izumi, K.
AU - Kawabe, K.
AU - King, E. J.
AU - Kissel, J. S.
AU - Kokeyama, K.
AU - Landry, M.
AU - McClelland, D. E.
AU - Miller, J.
AU - Mullavey, A.
AU - Oreilly, B.
AU - Rollins, J. G.
AU - Sanders, J. R.
AU - Schofield, R. M S
AU - Sigg, D.
AU - Slagmolen, B. J J
AU - Smith-Lefebvre, N. D.
AU - Vajente, G.
AU - Ward, R. L.
AU - Wipf, C.
PY - 2014/12/21
Y1 - 2014/12/21
N2 - Interferometric gravitational-wave detectors are complex instruments comprised of a Michelson interferometer enhanced by multiple coupled cavities. Active feedback control is required to operate these instruments and keep the cavities locked on resonance. The optical response is highly nonlinear until a good operating point is reached. The linear operating range is between 0.01% and 1% of a fringe for each degree of freedom. The resonance lock has to be achieved in all five degrees of freedom simultaneously, making the acquisition difficult. Furthermore, the cavity linewidth seen by the laser is only ~1 Hz, which is four orders of magnitude smaller than the linewidth of the free running laser. The arm length stabilization system is a new technique used for arm cavity locking in Advanced LIGO. Together with a modulation technique utilizing third harmonics to lock the central Michelson interferometer, the Advanced LIGO detector has been successfully locked and brought to an operating point where detecting gravitational-waves becomes feasible.
AB - Interferometric gravitational-wave detectors are complex instruments comprised of a Michelson interferometer enhanced by multiple coupled cavities. Active feedback control is required to operate these instruments and keep the cavities locked on resonance. The optical response is highly nonlinear until a good operating point is reached. The linear operating range is between 0.01% and 1% of a fringe for each degree of freedom. The resonance lock has to be achieved in all five degrees of freedom simultaneously, making the acquisition difficult. Furthermore, the cavity linewidth seen by the laser is only ~1 Hz, which is four orders of magnitude smaller than the linewidth of the free running laser. The arm length stabilization system is a new technique used for arm cavity locking in Advanced LIGO. Together with a modulation technique utilizing third harmonics to lock the central Michelson interferometer, the Advanced LIGO detector has been successfully locked and brought to an operating point where detecting gravitational-waves becomes feasible.
KW - Gravitational-wave detector
KW - Interferometer
KW - LIGO
UR - http://www.scopus.com/inward/record.url?scp=84918842131&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84918842131&partnerID=8YFLogxK
U2 - 10.1088/0264-9381/31/24/245010
DO - 10.1088/0264-9381/31/24/245010
M3 - Article
AN - SCOPUS:84918842131
VL - 31
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
SN - 0264-9381
IS - 24
M1 - 245010
ER -