[1] [1] W H Loh, R I Laming. 1.55um phase-shifted distributed feedback fiber laser ［J］. Electronics Letters, 1995, 31(17):1440-1442.

[2] [2] Y O Barmenkov, D Zalvidea, T P Salvador. Effective length of short Fabry-Perot cavity formed by uniform fiber Bragg gratings ［J］. Opt Express, 2006, 14(14):6394-6399.

[3] [3] D J Thompson, R E Scholten. Narrow linwidth tunable external cavity diode laser using wide bandwidth filter ［J］. Rev Sci Instrum, 2012, 83(2):023107.

[4] [4] Xue Yiyuan, An Honglin, Fu Libin, et al.. Narrow-linewidth single-mode DBR fiber lasers ［J］. Acta Optica Sinica, 2000, 20(9):1251-1254.

[5] [5] Wang Hongjie, Weng Yujia, Hu Ye, et al.. Compact narrow-width distributed feedback fiber laser ［J］. High Power Laser and Particle Beams, 2008, 20(6):891-893.

[6] [6] Xue Lifang, Zhang Qiang, Li Fang, et al.. High frequency modulation high power and narrow linewidth distributed feedback fiber laser ［J］. Acta Physica Sinica, 2011, 60(1):014213.

[7] [7] Xu Shiqiang, Yang Zhongmin, Wang Guonian, et al.. The uoconversion luminescence of Er3+/Yb3+-codoped oxyfluorosilicate glasses ［J］. Acta Optica Sinica, 2004, 24(8):1103-1106.

[8] [8] S W Lovseth, E Ronnekleiv. Fundamental and higher order mode thresholds of DFB fiber lasers ［J］. Journal of Lightwave Technology, 2002, 20(3):494-501.

[9] [9] D Sacastru, S Miclos, I Lancranjan. Theoretical analysis of the output noise of a DFB fiber laser sensor ［J］. International Journal of Mathematics and Computers in Simulation, 2010, 4(4):116-123.

[10] [10] Song Zhiqiang, Qi Haifeng, Ni Jiasheng, et al.. Comparison study on π phase-shifted FBG’s fabrication methods ［J］. Chinese J Lasers, 2012, 39(s1):s105002.

[11] [11] Song Zhiqiang, Qi Haifeng, Guo Jian, et al.. Characteristics of self-amplified distributed feedback fiber laser ［J］. Acta Photonica Sinica, 2014, 43(2):0206005.

[12] [12] J Guo, J Ni, H Qi, et al.. Measurement of acoustic noise induced linewidth broadening of unpackaged distributed feedback fiber laser ［C］. Applied Mechanics and Materials,2014,475:838-842.

[13] [13] C Wang, Y Shang, X Liu, et al.. Distributed acoustic mapping based on self-interferometry of phase-OTDR ［C］. Asia Communications and Photonics Conference 2014:213-215.

[14] [14] Y Lu, T Zhu, L Chen, et al.. Distributed vibration sensor based on coherent detection of phase-OTDR ［J］. Journal of Lightwave Technology, 2010, 28(22):3243-3249.