DUAL-WAVELENGTH FBG LASER SENSOR BASED ON PHOTONIC GENERATION OF RADIO FREQUENCY DEMODULATION TECHNIQUE

被引：8

作者：

Liu, S. C. ^{[1
,2
]}

Yin, Z. W. ^{[2
]}

Zhang, L. ^{[2
]}

Chen, X. F. ^{[2
]}

Gao, L. ^{[2
]}

Cheng, J. C. ^{[2
,3
,4
]}

机构：

[1] Heilongjiang Univ, Inst Fiber Opt, Harbin 150080, Peoples R China

[2] Nanjing Univ, Natl Lab Microstruct, Nanjing 210093, Peoples R China

[3] Nanjing Univ, Lab Modern Acoust, Nanjing 210093, Peoples R China

[4] Nanjing Univ, Inst Acoust, Nanjing 210093, Peoples R China

来源：

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS | 2009年 / 23卷 / 16期

关键词：

ERBIUM-DOPED FIBER; STRAIN;

D O I：

10.1163/156939309790109252

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Based on the radio frequency (RF) demodulation technique, a novel dual-wavelength fiber laser sensor is proposed and demonstrated experimentally. A beat sensing signal, which is generated by the coherently mixing output of a dual-wavelength laser in a high frequency photodetector, has been obtained and demodulated by a radio-frequency spectrum analyzer (RFSA). By employing a LiNbO(3) modulator, high-frequency beat signal can be tuned arbitrarily to tens or hundreds of megahertz without distortion and thus a low-frequency RFSA can be used. When a strain is applied on the laser sensor, the detected beat signals will be shifted with a strain sensitivity of about -8.11 kHz/mu epsilon.

引用

页码：2177 / 2185

页数：9

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