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Next-Generation TDM-PON Based on Multilevel Differential Modulation

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3 Author(s)
Sotiropoulos, N. ; COBRA Res. Inst., Eindhoven Univ. of Technol., Eindhoven, Netherlands ; Koonen, A.M.J. ; de Waardt, H.

In this letter, a next-generation time-division multiplexed passive optical network (TDM-PON) based on multilevel differential modulation formats is proposed. Multilevel modulation enables the efficient scaling of bit rates without resorting to very high-speed electronics and photonics, while differential detection simplifies the detection process. The 40 Gb/s downstream signal is implemented with Star 16 quadrature amplitude modulation, while two upstream channels are evaluated, a simple, asymmetrical 10 Gb/s on-off keying signal and a 30-Gb/s differential eight phase-shift keying signal. Experimental results show very good receiver sensitivities, indicating the proposed modulation format's suitability for future very high-speed TDM-PONs.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 5 )