Abstract
The higher-order interference noise that is caused by multireflection at the fiber sensor’s end surface in low- coherence fiber sensor array is proposed. The generation of the higher-order interference noise and its quantity and amplitude are theoretically analyzed. The second-order interference noises are experimentally demonstrated. The results show that the second-order noises arise in any sensor array composed of more than two sensors and the number of the second-order peaks is proportional to the third power of the sensor’s number. The ratio of the amplitude of the second-order noise to that of the signal peak is proportional to the reflectivity of the sensor’s end surface. In a sensor array, when the reflectivity is more than , the amplitude of the second-order noise is higher than other noises and it becomes a main factor that determines the signal-to-noise ratio of the sensor arrays. Therefore, reducing the higher-order interference noise can improve the multiplexing capacity of the sensor array.
© 2011 Optical Society of America
Full Article | PDF ArticleMore Like This
Liangmin Huang, Zhihua Ding, Wei Hong, Chuan Wang, and Tong Wu
Opt. Lett. 36(22) 4314-4316 (2011)
Libo Yuan and Jun Yang
Opt. Lett. 30(6) 601-603 (2005)
Libo Yuan, Jun Yang, Limin Zhou, Wei Jin, and Xiaoli Ding
Appl. Opt. 43(16) 3211-3216 (2004)