Title:
ブリルアン散乱測定方法およびブリルアン散乱測定装置
Document Type and Number:
Japanese Patent JP6552983
Kind Code:
B2
Abstract:
A Brillouin backscattered spectrum is obtained in such a way that two optical pulse pairs each composed of two pulses of different durations and of the same phase and Π phase difference are launched into a sensing optical fiber; Brillouin backscattered lights produced by the optical pulse pairs are detected into signals for the respective optical pulse pairs; the signals are sampled with two window functions whose time widths are equal to respective pulse durations of the optical pulse pair and whose delay time is variable; each sampled signal is transformed with a predetermined transformation; products of the transformed signals are calculated; and subtraction between the products is performed.
Inventors:
Kyoji Horiguchi
Application Number:
JP2016036685A
Publication Date:
July 31, 2019
Filing Date:
February 29, 2016
Export Citation:
Assignee:
Neubrex Co., Ltd.
International Classes:
G01D5/353; H01S5/12
Domestic Patent References:
| JP201263146A |
Foreign References:
| WO2004040241A1 | ||||
| US20160025524 |
Attorney, Agent or Firm:
Masuo Oiwa
Kenji Yoshizawa
Kenji Yoshizawa