FREQUENCY SYNTHESIS-BASED OPTICAL FREQUENCY DOMAIN REFLECTOMETRY METHOD AND SYSTEM

Title:

FREQUENCY SYNTHESIS-BASED OPTICAL FREQUENCY DOMAIN REFLECTOMETRY METHOD AND SYSTEM

Document Type and Number:

WIPO Patent Application WO/2017/117707

Kind Code:

A1

Abstract:

A frequency synthesis-based optical frequency domain reflectometry method and system. The method comprises: performing electro-optic modulation (3) and acousto-optic modulation (4) on local light to obtain an optical pulse; serving the optical pulse as a detection pulse optical signal (15) and inputting same to a test optical fiber (9); and coupling and beating an obtained Rayleigh backscattered optical signal (16) and the local light, performing photoelectric conversion, and demodulating same, so as to implement optical frequency reflectometry, wherein the electro-optic modulation (3) refers to modulating by means of a single frequency signal (11), the acousto-optic modulation (4) refers to modulating by means of a pulse signal (12), and multiple frequency components of an optical comb signal obtained by means of the electro-optic modulation (3) are swept simultaneously to obtain the optical pulse. The optical frequency domain reflectometry method and system have a large detection range, high spatial resolution, low hardware cost, and low software complexity.

Inventors:

HE ZUYUAN (CN)
LIU QINGWEN (CN)
FAN XINYU (CN)
CHEN DIAN (CN)

Application Number:

PCT/CN2016/070108

Publication Date:

July 13, 2017

Filing Date:

January 05, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

UNIV SHANGHAI JIAOTONG (CN)

International Classes:

H04B10/071

Foreign References:

CN105490738A	2016-04-13
CN205453695U	2016-08-10
CN105067103A	2015-11-18
CN103984184A	2014-08-13
CN103763022A	2014-04-30
JPS6475932A	1989-03-22

Other References: