Chinese Optics Letters, 2017, 15 (12): 120601, Published Online: Jul. 18, 2018
Performance enhancement of Brillouin optical correlation domain analysis based on frequency chirp magnification Download: 1249次
Abstract
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.
Bin Wang, Xinyu Fan, Jiangbing Du, Zuyuan He. Performance enhancement of Brillouin optical correlation domain analysis based on frequency chirp magnification[J]. Chinese Optics Letters, 2017, 15(12): 120601.