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20 December 2019 Tilt interferometer for detecting gravitational wave signals at high frequencies
S. Yu, C. Zhao, D. Blair, C. Blair, J. Liu, Q. Fang, L. Ju, F. Zhang
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Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 112090F (2019) https://doi.org/10.1117/12.2542601
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China
Abstract
We propose a tilt interferometer to search for gravitational wave (GW) signals at high frequencies. The torque caused by a cross-polarized gravitational wave passing through the mirrors in an interferometer can result in a tilt motion, which generates a TEM10 transverse mode of the cavity. The GW signal can then be detected as a beating between the TEM00 and TEM10 modes. There are two types of mirror motion that are relevant: the aforementioned rotation, as well as a translation in parallel to the front surface of the end mirror, in the local reference frame of the input test masses. We estimate that possible implementations could achieve a strain sensitivity of ∼ 7 10−22 Hz−1/2 in the frequency band of 100-500 kHz, limited by thermal and shot noises. A preliminary design for a prototype detector with a 74m optical cavity is presented.
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Citation Download Citation
S. Yu, C. Zhao, D. Blair, C. Blair, J. Liu, Q. Fang, L. Ju, and F. Zhang "Tilt interferometer for detecting gravitational wave signals at high frequencies", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112090F (20 December 2019); https://doi.org/10.1117/12.2542601
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KEYWORDS
Interferometers
Signal detection
Optical resonators
Polarization
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