研究目的
To develop a new pulsed fiber laser source at 1645.5 nm for methane gas leak detection using lidar technology.
研究成果
A 60 W peak-power fiber laser source at 1645.5 nm has been developed, suitable for methane gas leak detection up to 1 km range. Further improvements in power and optimization of spectral and temporal parameters are needed for enhanced performance.
研究不足
The gain is limited by pump power depletion and spontaneous Raman emission at superior orders. Pulse duration needs reshaping to achieve the desired 100-ns duration.
1：Experimental Design and Method Selection:
The design involves a two-stage amplification architecture using stimulated Raman amplification in silica fibers.
2：Sample Selection and Data Sources:
The laser source is tested for its ability to detect methane gas leaks.
3：List of Experimental Equipment and Materials:
Includes a DFB laser diode, highly non-linear fiber (HNLF), and fiber multiplexers.
4：Experimental Procedures and Operational Workflow:
The process involves seeding a master oscillator, followed by two stages of Raman amplification.
5：Data Analysis Methods:
Performance is evaluated based on peak power output and pulse duration.
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