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Optical Nyquist pulse generation by using a dual-electrode Mach-Zehnder modulator
Optics Letters
|April 29, 2017
Summary
We present a straightforward method for generating optical Nyquist pulses using a dual-electrode Mach-Zehnder modulator (MZM). This technique achieves efficient pulse generation with a specific roll-off factor, confirmed experimentally.
Area of Science:
- Photonics
- Optical Communications
- Signal Processing
Background:
- Optical pulse generation is crucial for high-speed communication systems.
- Existing methods for generating optical Nyquist pulses can be complex or inefficient.
Purpose of the Study:
- To demonstrate a simple and efficient method for generating optical Nyquist pulses.
- To achieve precise control over pulse shaping parameters like the roll-off factor.
Main Methods:
- Utilizing a dual-electrode Mach-Zehnder modulator (MZM).
- Driving the MZM with a combination of fundamental and second-harmonic radio frequency (RF) signals.
- Implementing a raised-cosine-shaped time filter and time lens within the MZM.
Main Results:
- Experimentally confirmed generation of optical Nyquist pulses with a roll-off factor of 0.52.
- Achieved an intrinsic conversion efficiency of 37%.
- Numerical analysis showed roll-off factor control down to approximately 0.3 by adjusting RF signal strength.
Conclusions:
- The demonstrated method offers a simple and efficient approach to optical Nyquist pulse generation.
- The technique allows for moderate control over the roll-off factor, enhancing its versatility.
- This method has potential applications in advanced optical communication systems.
