| Autor: |
Zou D, Thirkettle RJ, Gebauer A, MacDonald GK, Schreiber KU, Wells JR |
| Jazyk: |
angličtina |
| Zdroj: |
Applied optics [Appl Opt] 2021 Feb 20; Vol. 60 (6), pp. 1737-1743. |
| DOI: |
10.1364/AO.414897 |
| Abstrakt: |
We describe the construction and operation of a large ring laser whose beam paths enclose an area of 6.25 m 2 . The gyroscopic performance of this large laser interferometer was determined using laser operation at a wavelength of 632.8 nm. The laser cavity Q was inferred to be 1.1×10 12 via a measured ring-down time of 375 µs, and the measured Sagnac frequency is 198.40 Hz due to Earth's rotation. The measured experimental sensitivity to rotation achieved is 7.9×10 -12 r a d / s / H z at an averaging interval of 512 s (being limited primarily by ambient building noise). The observation of microseismic activity in the 200 mHz region as well as local earthquakes is discussed. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
