Simplified Brillouin optical time-domain analysis with extended measurement range by frequency dithering

被引：0

作者：

Hong, Jun Gi ^{[1
]}

Song, Kwang Yong ^{[1
]}

机构：

[1] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea

来源：

23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2014年 / 9157卷

关键词：

Distributed sensors; stimulated Brillouin scattering; modulation; SENSOR; BOTDA; FIBER;

D O I：

10.1117/12.2059457

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a simplified Brillouin optical-time domain analysis system based on direct current modulation of a laser diode with an extended measurement range and an enhanced spatial resolution. Slow and periodic frequency dithering is additionally applied to the laser diode to suppress the noise originated from coherent Rayleigh scattering. The distribution of Brillouin gain spectra along a 25 km fiber is successfully measured with a 1 m spatial resolution and an accuracy of sigma = 0.78 MHz, confirming its high practicality as a cost-effective solution.

引用

页数：4

共 7 条

[1] 150-km-range distributed temperature sensor based on coherent detection of spontaneous Brillouin backscatter and in-line Raman amplification [J].

Alahbabi, MN ;

Cho, YT ;

Newson, TP .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 2005, 22 (06) :1321-1324

[2] 32-KM DISTRIBUTED TEMPERATURE SENSOR-BASED ON BRILLOUIN LOSS IN AN OPTICAL-FIBER [J].

BAO, X ;

WEBB, DJ ;

JACKSON, DA .

OPTICS LETTERS, 1993, 18 (18) :1561-1563

[3] Fiber-optic distributed strain sensing system by Brillouin optical correlation domain analysis with a simple and accurate time-division pump-probe generation scheme [J].

Hotate, K ;

Yamauchi, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2005, 44 (28-32) :L1030-L1033

[4] High-resolution DPP-BOTDA over 50 km LEAF using return-to-zero coded pulses [J].

Liang, Hao ;

Li, Wenhai ;

Linze, Nicolas ;

Chen, Liang ;

Bao, Xiaoyi .

OPTICS LETTERS, 2010, 35 (10) :1503-1505

[5] Simple distributed fiber sensor based on Brillouin gain spectrum analysis [J].

Nikles, M ;

Thevenaz, L ;

Robert, PA .

OPTICS LETTERS, 1996, 21 (10) :758-760

[6] Simplified Brillouin optical time-domain sensor based on direct modulation of a laser diode [J].

Song, Kwang Yong ;

Yang, Sora .

OPTICS EXPRESS, 2010, 18 (23) :24012-24018

[7] Long-range simplex-coded BOTDA sensor over 120 km distance employing optical preamplification [J].

Soto, Marcelo A. ;

Bolognini, Gabriele ;

Di Pasquale, Fabrizio .

OPTICS LETTERS, 2011, 36 (02) :232-234

← 1 →