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首页> 外文期刊>Applied optics >Effect of beam waists on performance of the tunable fiber laser based on in-line two-taper Mach-Zehnder interferometer filter
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Effect of beam waists on performance of the tunable fiber laser based on in-line two-taper Mach-Zehnder interferometer filter

机译：基于在线两锥马赫曾德尔干涉仪滤波器的束腰对可调光纤激光器性能的影响

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摘要

A tunable fiber ring laser based on an in-line two-taper Mach-Zehnder interferometer (MZI) filter was realized, and the effect of beam waists of the tapers on performance of the laser was investigated with different beam waists of 70 (mu)m, 49 (mu)m, and 33 (mu)m. Experimental results show that the tunable laser with MZI length of 1 m and beam waist of 49 (mu)m can cover 16.1 nm with tuning steps of 0.07-0.5 nm, a bandwidth of 10 pm, and a side mode suppression ratio (SMSR) of 40-50 dB. Tuning range is not only determined by the number of the cladding modes but is also affected by the filter loss. Tuning step is determined by the differences of the effective refractive indexes between the cladding modes and the core mode. SMSR is determined by the balance between the extinction ratio of the filter and the cavity loss of the laser due to MZI filter.
机译：实现了基于在线两锥马赫曾德尔干涉仪（MZI）滤光片的可调谐光纤环形激光器，并研究了不同束腰70（mu）时锥度束腰对激光器性能的影响。 m，49μm和33μm。实验结果表明，MZI长度为1 m，束腰为49μm的可调谐激光器可以覆盖16.1 nm，调谐步长为0.07-0.5 nm，带宽为10 pm，并且具有边模抑制比（SMSR） 40-50 dB。调谐范围不仅取决于包层模式的数量，而且还受滤波器损耗的影响。调谐步骤由包层模式和纤芯模式之间的有效折射率之差确定。 SMSR由滤光片的消光比与由于MZI滤光片引起的激光器腔损耗之间的平衡来确定。

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