Performance enhancement of Brillouin optical correlation domain analysis based on frequency chirp magnification

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2017,（12）
• 页码范围: 11-14
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201715.120601

摘要

We propose a method to enhance the performance of Brillouin optical correlation domain analysis (BOCDA)with a broad chirp span of optical sources based on the frequency chirp magnification technique.In BOCDA systems,the number of effective sensing points is proportional to the chirp span of the light source,which is normally limited by the characteristics of the laser diode.We demonstrate a chirp span of 126 GHz with the proposed method,to double the effective sensing points of BOCDA.By combining with differential measurement schemes,a spatial resolution of ＜10 cm over a 1 km range is achieved.