In this letter, we present the generation, the balanced detection, and the transmission performance evaluation of dual polarization differential quadrature phase shift keying (DP-DQPSK) signals in optical access system integrated with fiber and free-space downlink. Polarization-multip- lexed (POLMUX) technique is introduced in the system for high spectral efficiency access utilization. 10 Gb/s DP-DQPSK downlink signals are successfully transmitted over 50 km SMF-28 and a 800 m wireless optical channel under the bad weather condition, such as fog and haze. The results show that the potentiality of DP-DQPSK optical access system is integrated with fiber and free- space downlink for providing flexible user access with high bandwidth efficiency.
References
[1]
Tomkos, L. Kazovsky, K. Kitaiama (2012) Next-Generation Optical Access Networks: Dynamic Bandwidth Allocation, Resource Use Optimization, and QoS Improvement. Guest Editorial IEEE Networks, 26, 2, 4-6.
[2]
Shao, Y., Huang, B., Chi, N., et al. (2010) A Novel Subcarrier OFDM-MSK WDM Passive Optical Network. IEEE Optical Fiber Communication Conference and Exposition (OFC).
[3]
Shao, Y. and Chi, N. (2011) Generation of OFDM-MSK Signal and Its Application for Radio over Fiber System in Future Access Network. IEEE CMC, 206-209.
[4]
Mostafa, S. Harnilovic, (2012) In-Field Demonstration of OFDM-FSO. IEEE Photonics Technology Letters, 24, 709- 711. http://dx.doi.org/10.1109/LPT.2012.2187279
[5]
Shao, Y., Wang, Y. and Chi, N. (2013) 60-GHz RoFsystem with Low PAPR 16QAM-OFDM Downlink Using PTS Segmentation. IEEE Photonics Technology Letters, 25, 855-858. http://dx.doi.org/10.1109/LPT.2013.2252425
[6]
Shao, Y., Chi, N., Fan, J., et al. (2012) Generation of 16-QAM-OFDM Signals Using Selected Mapping Method and Its Application in Optical Millimeter-Wave Access System. IEEE Photonics Technology Letters, 24, 1301-1303.
http://dx.doi.org/10.1109/LPT.2012.2202387
[7]
Abdollahi, S. R., Al-Raweshidy, H. S., Nilavalan, R., et al. (2011) An Integrated Transportation System for Baseband Data, Digital and Analogue Radio Signals over Fiber Network. Wireless Communications and Mobile Computing Conference (IWCMC), 2003-2008.
[8]
Shao, Y., Wang, S. and Tan, Z. (2014) Seamless Integration of RZ-DQPSK-DWDM Optical Links with MISO- OFDM-QPSK System for 4th Generation Wide-Area Coverage Mobile Communi-cation. Microwave and Optical Technology Letters, 56, 797-801. http://dx.doi.org/10.1002/mop.28201
[9]
Shao, Y. and Chi, N. (2012) A Novel Scheme for Seamless Integration of RZ-DPSK-DWDM Optical Links with MIMO-OFDM System. Microwave and Optical Technology Letters, 54, 7, 1676-1679.
http://dx.doi.org/10.1002/mop.26891
[10]
Shao, Y., Chi, N., Hou, C., et al. (2010) A Novel Return-to-Zero FSK Format for 40-Gb/s Transmission System Applications. IEEE Journal of Lightwave Technology, 28, 1770-1782. http://dx.doi.org/10.1109/JLT.2010.2048413
