High-resolution, compact dual-frequency fiber laser accelerometer

被引：2
|
作者：
Cao, Qian [1 ]
Liang, Yizhi [1 ]
Jin, Long [1 ]
Cheng, Linghao [1 ]
Guan, Bai-Ou [1 ]
机构：
[1] Jinan Univ, Inst Photon Technol, Guangzhou, Guangdong, Peoples R China
来源：
FIFTH ASIA-PACIFIC OPTICAL SENSORS CONFERENCE | 2015年 / 9655卷
关键词：
Accelerometer; fiber lasers; fiber laser sensors;
D O I：
10.1117/12.2185243
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：
We demonstrate an accelerometer based on a dual-frequency DBR fiber laser with a resolution of 6 mu g/Hz(1/2) at 1 kHz. The accelerometer is implemented by mounting a 250-milligram proof mass onto the laser cavity and converting the vibration into change in beat frequency between the two orthogonal polarization lasing modes. Experimental result shows that the sensitivity reaches 1.7 MHz/g at 1 kHz with a working bandwidth over 1 kHz. The high resolution is also a result of the noise level as low as 10 Hz/Hz(1/2) due to the compensation between the two lasing modes. The present accelerometer with extremely high resolution and light weight is promising for geophysical applications.
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页数：4
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