[1] [1] White paper of next generation front-haul interface[R]. Shanghai: China Mobile Research Institute, 2015.

[2] [2] Pfeiffer T. Next generation mobile Front-haul architectures[C]//Optical Fiber Communications Conference & Exhibition, 2015: 1-3.

[3] [3] Wu Limin, Song Peng, Wang Jing, et al. A squeezed lattice high negative dispersion and high birefringence photonic crystal fiber [J]. Infrared and Laser Engineering, 2016, 45(S1): S120001. (in Chinese)

[4] [4] Liu Fuhua, Wang Ping, Feng Gang, et al. Influence of Gamma-ray radiation on optical fiber dispersion [J]. Infrared and Laser Engineering, 2016, 45(1): 0118001. (in Chinese)

[5] [5] Li Xin, Zheng Hongjun, Xia Yunjie. Supercontinuum spectrum generation in dispersion flatted fiber with concave dispersion profile [C]//SPIE, 2008, 7136: 71363A.

[6] [6] Taga Hidenori, Chung Weihung. Impact of dispersion map design upon transmission performance of long-haul RZDPSK system using dispersion flattened fiber [J]. Optics Express, 2010, 18(8): 8332-8337.

[7] [7] Zheng Hongjun, Liu Shanliang, Wu Chongqing, et al. Experimental study on pulse propagation characteristics at normal dispersion region in dispersion flatted fibers [J]. Optics & Laser Technology, 2012, 44(4): 763-766.

[8] [8] Zheng Hongjun, Li Xin, Liu Shanliang, et al. Generation and transmission of a high-bit-rate optical millimeter wave with an unrepeated long single-span using equalization amplification [J]. Optics Communications, 2015, 356: 599-606.

[9] [9] Xu Y Z, Liu M X, Zhan G, et al. Nonlinear chirped-pulse propagation and supercontinuum generation in dispersion-flattened dispersion-decreasing fibers [J]. Chinese Journal of Luminescence, 2016, 37(4): 439-445.

[10] [10] Wang Yi, Yang Shuai, Ma Jing, et al. Performance analysis of coherent OFDM system in free space optical communication [J]. Infrared and Laser Engineering, 2016, 45(7): 0722003. (in Chinese)

[11] [11] Ruan Xiukai, Tang Zhenzhou, Zhang Yaoju, et al. Electrical blind detection of coherent optical communication signals using feedback voltage bias type Hopfield neural network [J]. Infrared and Laser Engineering, 2015, 44(2): 715-720. (in Chinese)

[12] [12] Meng Xiaobo, Zhou Weiqin, Ge Chao, et al. Long-haul 112 Gbit/s coherent polarization multiplexing QPSK transmission experiment on G.652 fiber with the improved DSP unit [J]. Optik-International Journal for Light and Electron Optics, 2013, 124(18): 3665-3670.

[13] [13] Zhang Tingting, Dan Wang, Rui Ding, et al. 396.5 Gb/s, 7.93 b/s/Hz hybrid 16-32QAM transmission over 480 km SSMF[C]//Advanced Photonics for Communications, 2014, SM3E: SM3E.3.

[14] [14] Guiomar F P, Carena A, Bosco G, et al. Nonlinear mitigation on subcarrier-multiplexed PM-16QAM optical systems [J]. Optics Express, 2017, 25(4): 4298-4311.

[15] [15] Darko Zibar, Ole Winther, Niccolo Franceschi, et al. Nonlinear impairment compensation using expectation maximization for dispersion managed and unmanaged PDM 16QAM transmission [J]. Optics Express, 2012, 20(26): 181-196.