研究目的
Investigation of narrow band random ?ber ring laser based on random phase-shift Bragg grating
研究成果
The study successfully demonstrates a narrow band random fiber ring laser with high stability in lasing wavelength and peak power, high optical signal-to-noise ratio, and low pump threshold. The laser's performance can be further stabilized by immersing the random grating in water, suppressing mode competition.
研究不足
The study is limited by the ultra-short grating length which may not provide strong enough random distributed feedback, and the optical losses in the cavity which affect the slope efficiency.
1：Experimental Design and Method Selection:
The study employs a random phase-shift fiber Bragg grating fabricated with the beam-scanning method in a single-mode fiber to achieve random feedback and light localization.
2：Sample Selection and Data Sources:
A 25 mm long random phase-shift fiber Bragg grating with 20 phase-shift points of random amplitudes is used.
3：List of Experimental Equipment and Materials:
Equipment includes a 980 nm laser source, optical circulator, random phase-shift FBG, and optical spectrum analyzer. Materials include hydrogenated fiber and Er-doped fiber.
4：Experimental Procedures and Operational Workflow:
The setup involves pumping the system with a 980 nm laser, observing the output spectrum and power characteristics, and adjusting the pump power to study the laser's behavior.
5：Data Analysis Methods:
The output spectrum is analyzed for bandwidth, signal-to-noise ratio, and wavelength stability over time.
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