Fast dispersion estimation in coherent optical 16QAM fast OFDM systems.

Fast channel estimation is crucial to increase the payload efficiency which is of particular importance for optical packet networks. In this paper, we propose a novel least-square based dispersion estimation method in coherent optical fast OFDM (F-OFDM) systems. Additionally, we experimentally demonstrate for the first time a 37.5 Gb/s 16QAM coherent F-OFDM system with 480 km transmission using the proposed scheme. The results show that this method outperforms the conventional channel estimation methods in minimizing the overhead load. A single training symbol can achieve near-optimum channel estimation without any prior information of the transmission distance. This makes optical F-OFDM a very promising scheme for the future burst-mode applications.

[1]  Jianjun Yu,et al.  None pilot-tones and training sequence assisted OFDM technology based on multiple-differential amplitude phase shift keying. , 2012, Optics express.

[2]  Shizhong Xie,et al.  All-Optical Sampling Orthogonal Frequency-Division Multiplexing Scheme for High-Speed Transmission System , 2009, Journal of Lightwave Technology.

[3]  Cheng Lei,et al.  A high spectral efficiency optical OFDM scheme based on interleaved multiplexing. , 2010, Optics express.

[4]  M. S. Moreolo,et al.  Optical Fiber Communication Conference , 2014 .

[5]  Shuping Peng,et al.  European Conference on Optical Communications (ECOC) , 2014 .

[6]  Jian Zhao,et al.  Transmission of 4-ASK Optical Fast OFDM With Chromatic Dispersion Compensation , 2012, IEEE Photonics Technology Letters.

[7]  Beril Inan,et al.  Realization of a real-time 93.8-Gb/s polarization-multiplexed OFDM transmitter with 1024-point IFFT , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[8]  Luiz Anet Neto,et al.  High bit rate burst mode optical OFDM for next generation passive optical networks , 2010, 36th European Conference and Exhibition on Optical Communication.

[9]  Ioannis Tomkos,et al.  Experimental and Theoretical Investigations of Intensity-Modulation and Direct-Detection Optical Fast-OFDM Over MMF-Links , 2012, IEEE Photonics Technology Letters.

[10]  Jian Zhao,et al.  Advantage of Optical Fast OFDM Over OFDM in Residual Frequency Offset Compensation , 2012, IEEE Photonics Technology Letters.

[11]  Francesca Parmigiani,et al.  26 Tbit s-1 line-rate super-channel transmission utilizing all-optical fast Fourier transform processing , 2011 .

[12]  William Shieh,et al.  Coherent optical DFT-spread OFDM transmission using orthogonal band multiplexing. , 2012, Optics express.

[13]  Xiang Liu,et al.  Intra-symbol frequency-domain averaging based channel estimation for coherent optical OFDM. , 2008, Optics express.

[14]  Weisheng Hu,et al.  Chromatic dispersion compensation using two pilot tones in optical OFDM systems , 2011, 2011 Asia Communications and Photonics Conference and Exhibition (ACP).