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基于半导体光放大器(SOA)的环形腔激光器可实现高达兆赫兹的高速调谐,在光纤通信和光纤传感领域有广泛应用。采用稳态模型和分段算法研究SOA自发辐射特性,并基于此分别讨论了使用高斯型滤波器和法布里-珀罗(F-P)滤波器的两种可调谐环形腔激光器,研究了激光建立过程的特性,包括输出光谱和输出光功率随绕行圈数的变化,讨论了波长调谐的速度。结果表明,F-P滤波器的环形腔可以更快建立激光振荡,便于实际高速调谐应用。
Circular cavity lasers based on semiconductor optical amplifiers (SOA) enable high-speed tuning up to megahertz and are widely used in the field of optical fiber communication and optical fiber sensing. The steady-state model and the segmentation algorithm are used to study the spontaneous emission characteristics of SOA. Two tunable ring lasers using Gaussian filter and Fabry-Perot (FP) filter are discussed respectively. The characteristics of the process, including the change of the output spectrum and the output optical power with the number of turns, discuss the speed of wavelength tuning. The results show that the annular cavity of the F-P filter can establish laser oscillation faster, which is convenient for practical high-speed tuning.