Acta Optica Sinica, Volume. 7, Issue 6, 530(1987)
Measurement of mode field radius using equivalent variable aperture method in far-field of single mode fibers
An equivalent variable aperture method for mode field radius measurement of aingle mode fibers is proposed. It involves measurement of the integrated far-field distribution with a circular aperture moved axially in the far-field of the fiber. In sddition, calculation method of the mode field radius, which is also suitable for non-Gaussian field dis-tributions, is derived by using Petermann s new definition of mode field radius. Experiments have shown that this method is simple and reliable. The typical deviation of repeted measurements of the mode field radius of a given fiber with, different ends is less than 0.04μm.
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BAI AIMIN. Measurement of mode field radius using equivalent variable aperture method in far-field of single mode fibers[J]. Acta Optica Sinica, 1987, 7(6): 530