Title:
折返しサニャックセンサアレイ
Document Type and Number:
Japanese Patent JP4181748
Kind Code:
B2
Abstract:
A folded Sagnac fiber optic acoustic sensor array operates in a manner similar to a Sagnac interferometer but uses a common delay path to reduce distributed pickup in downlead fibers. The fiber optic acoustic sensor array is used to detect acoustic waves in water. By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer rather than basing the array on a Mach-Zehnder interferometer, the sensor array has a stable bias point, has reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of acoustic sensors can be multiplexed into the architecture of the folded Sagnac fiber optic acoustic array.
Inventors:
Benjamin Jay, Bacock
Application Number:
JP2000542952A
Publication Date:
November 19, 2008
Filing Date:
March 29, 1999
Export Citation:
Assignee:
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
International Classes:
G01H9/00; G01N29/24; G01S3/80; H04R1/44; H04R23/00
Domestic Patent References:
| JP61210910A |
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Hidehiko Ito
Yutaka Horii
Morishita Hachiro
Toshio Morita
Yoshihei Nakamura
Hidehiko Ito
Yutaka Horii
Morishita Hachiro