Figure 8
From: High Speed All Optical Nyquist Signal Generation and Full-band Coherent Detection
Off-line DSP blocks and Back-to-back bit-error-ratio results versus the OSNR.
(a) shows the off-line DSP blocks for the Nyquist QPSK signal recovery. (b) shows the back-to-back BER performance of the generated all-optical Nyquist 62.5, 75 and 125-GBaud QPSK signal versus the optical signal-noise-ratio (OSNR in 0.1 nm reference bandwidth) is measured compared with the theoretical values.
