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Updated: Jun 29, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Search for a stochastic background of 100-MHz gravitational waves with laser interferometers
Tomotada Akutsu1, Seiji Kawamura, Atsushi Nishizawa
1Department of Astronomy, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan. takutsu@gravity.mtk.nao.ac.jp
Abstract:
This Letter reports the results of a search for a stochastic background of gravitational waves (GW) at 100 MHz by laser interferometry. We have developed a GW detector, which is a pair of 75-cm baseline synchronous recycling (resonant recycling) interferometers. Each interferometer has a strain sensitivity of approximately 10;{-16} Hz;{-1/2} at 100 MHz. By cross-correlating the outputs of the two interferometers within 1000 seconds, we found h{100};{2}Omega_{gw}<6 x 10;{25} to be an upper limit on the energy density spectrum of the GW background in a 2-kHz bandwidth around 100 MHz, where a flat spectrum is assumed.
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