研究目的
Investigating the inter-sweep phase stability of an FDML laser using a tunable ring laser with a line width of less than 10 kHz.
研究成果
The measurements indicate a stable carrier envelope slip and only a small amount of random phase noise in the inter-sweep phase of the FDML laser. The phase of successive FDML sweeps follows a sinusoidal periodicity, suggesting a constant and stable carrier envelope phase slip with low arbitrary phase noise.
研究不足
The study is limited by the analog detection bandwidth of ～33 GHz and the specific parameters of the FDML and ring lasers used.
1：Experimental Design and Method Selection:
The experiment involved measuring the beating of an FDML laser with a tunable ring laser to analyze the inter-sweep phase stability.
2：Sample Selection and Data Sources:
The FDML laser and the ring laser were used as the light sources.
3：List of Experimental Equipment and Materials:
A tunable ring laser with a transmission grating, FDML laser, fiber coupler, fast photodiode, and oscilloscope were used.
4：Experimental Procedures and Operational Workflow:
The lasers were superimposed with a fiber coupler, and the resulting beat signal was recorded by a fast photodiode. The interference signal was analyzed when the difference in optical frequencies was sufficiently small.
5：Data Analysis Methods:
The intensity of consecutive beat signals was analyzed to detect the evolution of the inter-sweep phase.
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