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A stable and tunable linear polarization single longitudinal mode fiber ring laser

机译:稳定可调谐的线性偏振单纵模光纤环形激光器

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摘要

A stable and tunable linear polarization single longitudinal mode fiber ring laser is proposed and demonstrated. A high extinction ratio spatial mode interference filter utilizing two-mode graded-index fiber supresses irregular side modes effectively, the combination of fiber polarizer and polarization maintaining fiber act as a polarization dependent comb filter, and tunable bandpass filter is adopted to select proper lasing wavelength. The power fluctuation and wavelength fluctuation at 1549.88 nm are less than 0.05 dB and 0.02 nm in 1 h, respectively. Only one longitudinal mode appears within a free spectral range of 7.5 GHz, and the degree of polarization in percentage is approximately as high as 99.07%.
机译:提出并证明了一种稳定可调的线性偏振单纵模光纤环形激光器。高消光比空间模式干涉滤光片有效利用了两模渐变折射率光纤抑制了不规则的侧模,光纤偏振片和保偏光纤的组合起偏振相关梳状滤光片的作用,采用可调带通滤光片选择合适的激射波长。 1h内1549.88 nm处的功率波动和波长波动分别小于0.05 dB和0.02 nm。在7.5 GHz的自由光谱范围内仅出现一种纵向模式,并且极化程度的百分比大约高达99.07%。

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