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半导体光放大器(SOA)的非均匀加宽特性对产生多波长激光非常有利。本文对两段式立奥-萨尼亚克(Lyot-Sagnac)滤波器进行了详细的理论分析,实现了一种基于半导体光放大器的新型多波长光纤激光器。它利用立奥-萨尼亚克滤波器的波长选择性,在室温下得到了约18个具有30 dB信噪比的多波长激光输出。波长范围1556~1577 nm。通过调节立奥-萨尼亚克环内的偏振控制器,多波长激光的波长间隔可在两种国际电信联盟(ITU)标准波长间隔(0.4 nm和0.8 nm)间选择。这种构型的光纤激光器具有稳定性好、波长间隔可控、信噪比高等优点。
The non-uniform widening characteristic of a semiconductor optical amplifier (SOA) is very advantageous for generating a multi-wavelength laser. In this paper, a detailed theoretical analysis of a two-stage Lyot-Sagnac filter has been carried out to realize a novel multi-wavelength fiber laser based on a semiconductor optical amplifier. Taking advantage of the wavelength selectivity of the LiOAo-Sagnac filter, it produces about 18 multiwavelength laser outputs with a signal-to-noise ratio of 30 dB at room temperature. Wavelength range 1556 ~ 1577 nm. By adjusting the polarization controller in the Liosa-Sagnac ring, the wavelength separation of multiwavelength lasers can be selected between two ITU standard wavelength separations (0.4 nm and 0.8 nm). Fiber lasers of this configuration have the advantages of good stability, controllable wavelength spacing and high signal-to-noise ratio.