研究目的
Investigating the effects of laser polarization on the performance of a terahertz time-domain spectrometer.
研究成果
The study demonstrates that precise control of laser polarization can eliminate time-domain pulse splitting and achieve a single peak time-domain pulse with high signal-to-noise ratio. Optimal performance is achieved when the polarization direction of the pump and detection lasers is parallel to the PMF fast or slow axis.
研究不足
The study is limited to the effects of laser polarization on the performance of a specific type of terahertz time-domain spectrometer. Potential areas for optimization include further reducing pulse splitting and enhancing signal-to-noise ratio.
1：Experimental Design and Method Selection:
The study involves designing a fiber-type terahertz time-domain spectrometer and examining the impact of laser polarization on its performance.
2：Sample Selection and Data Sources:
The experiment uses a fiber femtosecond laser and fiber-coupled photoconductive antenna.
3：List of Experimental Equipment and Materials:
Includes a fiber femtosecond laser (FemtoFErb 1560, Toptica), polarization control unit, motorized variable optical Delay-Line (MDL), and fiber-coupled photoconductive antennas (Tx and Rx).
4：Experimental Procedures and Operational Workflow:
The process involves transmitting the femtosecond laser through a single-mode PMF, DCF, and polarization control unit, then analyzing the effects on THz signals.
5：Data Analysis Methods:
The study analyzes the time-domain waveform, intensity, and spectral characteristics of THz signals.
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