研究目的
To develop a compact, movable, and robust optical frequency comb (OFC) system with a tunable repetition rate for applications in precision measurements outside the laboratory.
研究成果
The developed compact and robust OFC system with a tunable repetition rate and tight phase locking demonstrates excellent stability and accuracy, making it suitable for precision metrology applications outside the laboratory.
研究不足
The phase locking bandwidth is limited by the stimulated lifetime depending on the gain medium and design of the laser cavity. The noise level of the repetition rate is limited by the reference RF signal.
1：Experimental Design and Method Selection:
The study utilized an all-polarization-maintaining (PM) mode-locked Er-doped fiber laser to generate a tunable optical frequency comb. The design focused on compactness, robustness, and tunability of the repetition rate.
2：Sample Selection and Data Sources:
The experiment used a homemade all-PM, mode-locked fiber laser and an all-PM fiber amplifier. Data were collected on the laser's performance, including tunability, stability, and phase noise.
3：List of Experimental Equipment and Materials:
Key equipment included an RF analyzer (N9010A, Agilent), a power meter (PMD 1000), and optical spectrum analyzers (AQ6370 and 771B-MIR). Materials included PM Er-doped fiber, SESAM, and a piezoelectric transducer (PZT).
4：Experimental Procedures and Operational Workflow:
The process involved generating a soliton pulse with the fiber laser, amplifying the pulse, and then generating a supercontinuum for detection of the CEO frequency. The repetition rate and carrier–envelope offset were stabilized using phase-locked loops.
5：Data Analysis Methods:
The stability and performance of the OFC were analyzed using frequency counters, Allan deviation calculations, and phase noise measurements.
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