2024-03-28T14:10:58Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00002164
2022-12-15T03:35:00Z
423:424:425
453:454
Displacement measuring technique for satellite-to-satellite laser interferometer to determine Earth's gravity field
Displacement measuring technique for satellite-to-satellite laser interferometer to determine Earth's gravity field
Nagano, Shigeo
7351
Yoshino, Taizoh
7352
Kunimori, Hiroo
7353
Hosokawa, Mizuhiko
7354
Kawamura, Seiji
7355
Sato, Takashi
7356
Ohkawa, Masashi
7357
We present a new displacement measuring technique with simplicity, robustness, high sensitivity and wide measurement range. A set of a frequency shifter and a voltage–frequency converter is used to lock a homodyne interferometer on the half-bright fringe by eliminating the Doppler fringe resulting from mirror motion. The mirror displacement is directly retrieved from the feedback signal of a fringe control loop. By developing a table-top interferometer, we successfully demonstrated signal recovery without significant degradation. The achieved displacement sensitivity and measurement range of the interferometer were 24 nm Hz^−1/2 and 1.3 mm at a Fourier frequency of 0.1 Hz, respectively. This technique was found to have a potential for application to precise displacement measurements. It is, in particular, suitable for a satellite-to-satellite laser interferometer to determine Earth's gravity field.
journal article
IOP Publishing
2004-12
application/pdf
Measurement Science and Technology
12
15
2406
2411
Measurement Science and Technology
AA1072904X
09570233
https://niigata-u.repo.nii.ac.jp/record/2164/files/15_12_2406-2411.pdf
eng
info:doi/10.1088/0957-0233/15/12/009
Copyright (C) 2004 IOP Publishing Ltd