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Proceedings Paper • Open Access

Highly frequency-stabilized laser for space gravitational wave detector DECIGO/DPF
Author(s): Aru Suemasa; Ken'ichi Nakagawa; Mitsuru Musha

Paper Abstract

Direct detections of gravitational wave (GW) by using a long-baseline laser interferometer have been tried in many countries. In Japan, a space-GW detector named DECIGO (Deci-hertz interferometer Gravitational wave detector), and its milestone mission DPF (DECIGO pathfinder) has been promoted. We have developed a spaceborne highly frequency-stabilized light source for DECIGO and DPF with high mechanical stability, long-term stable operation, high-efficiency and compactness. The frequency of an Yb doped fiber DFB laser at 1030 nm was locked to the saturated absorption signal of the iodine molecule (I2) at 515 nm. We have developed the breadboard model 1 (BBM1) of the I2 stabilized Yb:fiber laser, which was installed on a 550x300x20-mm aluminum plate. The frequency noise of the laser was suppressed down to 0.4 Hz/Hz1/2 at 1 Hz which was evaluated from the frequency error signal. In the present paper, we will report the details and performance of the BBM1 of the light source for DECIGO and DPF.

Paper Details

Date Published: 17 November 2017
PDF: 5 pages
Proc. SPIE 10563, International Conference on Space Optics — ICSO 2014, 105632V (17 November 2017); doi: 10.1117/12.2304209
Show Author Affiliations
Aru Suemasa, Univ. of Electro-communications (Japan)
Ken'ichi Nakagawa, Univ. of Electro-Communications (Japan)
Mitsuru Musha, Univ. of Electro-Communications (Japan)

Published in SPIE Proceedings Vol. 10563:
International Conference on Space Optics — ICSO 2014
Zoran Sodnik; Bruno Cugny; Nikos Karafolas, Editor(s)

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