Abstract

To reduce the output power ununiformity mainly caused by the exponential attenuation of pump power in a distributed feedback fiber laser (DFB FL) sensor array, a power equalization method based on array structure optimization is proposed. By analyzing the influencing factors of the output power flatness of the array, an output power prediction model of a DFB FL wavelength division multiplexing (WDM) array is established, and the standard deviation coefficient of the output power is proposed as the main evaluating indicator for assessing the output power flatness. An array structure optimization scheme based on the simulated annealing algorithm is designed, and the optimized array structure of the 64-element DFB FL sensor array is achieved. The results show that the power fluctuation of the optimized array is significantly reduced from universal 5–10 dB to smaller than 2.6 dB, while the performance of the DFB FL sensor array is improved with better noise floor and increased multiplexing capacity, as well as improved array design efficiency.

© 2022 Optica Publishing Group

Ultra-narrow-linewidth DFB laser array based on dual-cavity feedback

Tianyi Lan, Zhewei Cao, Ligang Huang, Yujia Li, Fuhui Li, Lidan Jiang, Paul Ikechukwu Iroegbu, Laiyang Dang, Qirui Gao, Lei Liang, Kun Mei, Sen Fu, Guolu Yin, and Tao Zhu
Opt. Express 30(9) 14617-14628 (2022)

Large-scale interferometric fiber sensor arrays with multiple optical amplifiers

C. W. Hodgson, M. J. F. Digonnet, and H. J. Shaw
Opt. Lett. 22(21) 1651-1653 (1997)

Crosstalk interference synthesis and polarization switching hybrid interrogating method for inline interferometric fiber Bragg grating sensor arrays

Lina Ma, Fan Shang, Yi Yu, and Zhengliang Hu
Opt. Continuum 1(3) 591-602 (2022)

Internal phase control of coherent fiber laser array without ambiguous phase based on double wavelength detection

Hongxiang Chang, Rongtao Su, Qi Chang, Jinhu Long, Pengfei Ma, Yanxing Ma, and Pu Zhou
Appl. Opt. 61(12) 3429-3434 (2022)

Combined time- and wavelength-division-multiplexing demodulation technique of fiber grating sensor arrays using a tunable pulsed laser

Bo Dong, Shiya He, Yang Hushu, Wei Tianda, Feng Lvjun, Tuan Guo, and Qida Zhao
Appl. Opt. 46(7) 1015-1018 (2007)