所属单位：University of Ottawa
论文名称：Highly sensitive fiber-random-grating based random laser sensor for ultrasound detection
发表刊物：Optics Letters
摘要：A novel highly sensitive ultrasound sensor based on a random fiber laser is proposed and demonstrated for the first time, to the best of our knowledge. The random fiber laser is constructed with the erbium-doped fiber gain. A fiber random grating provides random-distributed feedback for the random laser and acts as an ultrasound sensing head. The random laser can operate in a single-mode lasing scenario, which offers linear and pure temporal responses to the broadband ultrasonic acoustic emission from 20 kHz to 0.8 MHz. The multiple-interfering reflection spectrum of the random grating provides a large number of steep peak areas over a broad spectral range, which significantly enhances the sensitivity of the random laser sensor and makes it an ideal sensor in harsh environments with large temperature or strain variations. The proposed laser sensor offers signal-to-noise ratio improvement up to 20 dB and higher sensitivity compared with conventional piezoelectric acoustic sensors.
全部作者：Liang Zhang,Song Gao,Ping Lu,Stephen Mihailov
第一作者：Yanping Xu
论文类型：期刊论文
通讯作者：Xiaoyi Bao
学科门类：工学
一级学科：光学工程
文献类型：J
卷号：42
期号：7
页面范围：1353-1356
是否译文：否
发表时间：2017-03-01
收录刊物：SCI
发表时间：2017-03-01