Lock acquisition scheme for the advanced LIGO optical configuration

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Abstract

The lock acquisition scheme for the Advanced LIGO optical configuration, which makes use of ""resonant sideband extraction"", is under investigation in the 40 meter prototype interferometer at Caltech. The 40m has a similar optical configuration to the one planned for Advanced LIGO which has 5 degrees of freedom for length control. So far we have succeeded in locking the 5 degrees of freedom routinely. The differential mode of arm cavities was locked in the same state as the final setup, and the peak of optical resonance was verified to be around 4 kHz. Currently, since an offset remains in the common mode of the arm cavities, another optical resonance can be seen in common mode optical gain. © 2006 IOP Publishing Ltd.

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Miyakawa, O., Ward, R., Adhikari, R., Abbott, B., Bork, R., Busby, D., … Weinstein, A. (2006). Lock acquisition scheme for the advanced LIGO optical configuration. In Journal of Physics: Conference Series (Vol. 32, pp. 265–269). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/32/1/039

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