Abstract

We demonstrate a simple and efficient optical Nyquist pulse generation by using a dual-electrode Mach–Zehnder modulator (MZM) driven by a combination of fundamental and second-harmonic RF signals. The method is based on a raised-cosine-shaped time filter and time lens created in the MZM under operation conditions given by a simple equation. Optical Nyquist pulses with a roll-off factor of 0.52 and intrinsic conversion efficiency of 37% are experimentally confirmed. Numerical analyses indicate that the roll-off factor can be moderately controlled down to 0.3 by increasing relative strength of fundamental RF signals.

© 2017 Optical Society of America

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