研究目的
Investigating an efficient multi-carrier THz signals generation scheme based on second order SSB modulation for THz communication systems.
研究成果
The proposed scheme supports a new way to realize THz multi-carrier signals generation via DPMZMs in parallel, achieving excellent SMSR and good power flatness. The frequency interval and spectrum bandwidth of the THz signals can be adjusting flexibly with the adjustment the frequency of the RF source.
研究不足
The asymmetrical optical coupling ratio would deteriorate the flatness and the SMSR of generated multi-carrier. Power fluctuation and the SMSR drops dramatically when the coupling ratio of the coupler is higher than 56:44.
1：Experimental Design and Method Selection:
The scheme is based on DPMZM in parallel and recirculating frequency shifter (RFS) for generating multi-carrier THz signals.
2：Sample Selection and Data Sources:
Simulation experiment performed based on VPI with a laser source wavelength of 1550 nm.
3：List of Experimental Equipment and Materials:
DPMZM, RFS, laser source, optical coupler, band pass filter, Erbium-doped optical fiber amplifier.
4：Experimental Procedures and Operational Workflow:
Optical carrier from laser source is sent to the RFS loop, optimized sub-modulators to generate SSB signals, adjusted electrical phase shifts.
5：Data Analysis Methods:
Analysis of SMSR and power fluctuation under different conditions.
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