On the base of a plenty of facts we suggested a method in which bi-Gaussian form is approached the output pulse in multimode fibers The accuracy measuring band in time domain can be improved highly.
To study the relationship, the output capability of multimode fiber laser is measured under various bending diameters, and it also be calculated theoretically.
为研究两者之间的关系，在光纤不同弯曲直径下，对多模光纤激光器的输出性能进行了实验测量和理论计算。
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During the experiment, as the coil radius of multimode fiber changes, output characteristic of the laser has been measured. Meanwhile, the mode loss of different modes is calculated theoretically.