Flexible and lossless baud-rate switching for 4-time slots Nyquist OTDM signals using wavelength selective switch

Abstract

We demonstrate a flexible and lossless baud-rate switching process of the Nyquist OTDM signals using a wavelength selective switch (WSS) equipped with 4 output ports for different time slots. We generate the Nyquist OTDM signals with different baud rates without using any static OTDM devices such as an optical circuit. The WSSonly configuration allows a flexible baud rate switching by changing the filter functions applied to the WSS. The proposed system can successfully switch among 40, 80 and 120-Gboud/s signals with a switching duration of 80 ms.

Experimental emulation of nonlinear distortion suppression by FrOFDM subcarriers

“…Effective use of network resources is indispensable for improvement of the spectral efficiency characterizing an entire network in an elastic optical network [1,2]. Orthogonal division multiplexing (OFDM) and Nyquist optical time division multiplexing (N-OTDM) are essential technologies for achieving high spectral efficiency [3][4][5][6][7][8][9][10]. Furthermore, OFDM allows high tolerance of residual dispersion and the required performance of the receiver can be reduced by inserting a cyclic prefix (CP) [11].…”