Search for a stochastic background of 100-MHz gravitational waves with laser interferometers

Tomotada Akutsu*, Seiji Kawamura, Atsushi Nishizawa, Koji Arai, Kazuhiro Yamamoto, Daisuke Tatsumi, Shigeo Nagano, Erina Nishida, Takeshi Chiba, Ryuichi Takahashi, Naoshi Sugiyama, Mitsuhiro Fukushima, Toshitaka Yamazaki, Masa Katsu Fujimoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


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 ∼10-16Hz-1/2 at 100 MHz. By cross-correlating the outputs of the two interferometers within 1000 seconds, we found h1002Ωgw<6×1025 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.

Original languageEnglish
Article number101101
JournalPhysical Review Letters
Issue number10
Publication statusPublished - 2008 Sept 5
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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