Proposal of external modulation scheme for fiber-optic correlation-domain distributed sensing

被引：16
|
作者：
Noda, Kohei [1 ]
Han, Giwoon [1 ]
Lee, Heeyoung [1 ]
Mizuno, Yosuke [1 ]
Nakamura, Kentaro [1 ]
机构：
[1] Tokyo Inst Technol, Inst Innovat Res, Yokohama, Kanagawa 2268503, Japan
来源：
APPLIED PHYSICS EXPRESS | 2019年 / 12卷 / 02期
关键词：
MEASUREMENT RANGE ENLARGEMENT; BRAGG GRATING SENSORS; INTENSITY MODULATION; REFLECTOMETRY; WAVELENGTH;
D O I：
10.7567/1882-0786/aaf416
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
All the previous configurations of optical correlation-domain reflectometry (OCDR) have been based on the direct modulation of laser driving current. However, some lasers are not designed for high-speed large-amplitude modulation, and the modulation amplitude and frequency are mutually dependent. In this work, to mitigate these drawbacks, we propose an external modulation scheme for OCDR. After confirming its basic operation, we show that a non-specially designed laser can be employed. We also clarify that the interdependence of the modulation amplitude and frequency is negligibly small in this scheme, which is not the case for the conventional direct modulation scheme. (C) 2019 The Japan Society of Applied Physics
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页数：4
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