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- W2027672960 abstract "Great progress has been made in fiber laser technology especially the high power fiber laser. One of the keytechniques to acquire higher output power is coupling more pump laser into the double-cladding fiber using the fibercombiner. Fiber splices exist in both manufacture of the combiner and integration of the fiber components. The opticalwaveguide structure of the splice point has great effect on the insertion loss and modal content for the fiber laser system.Thus it is important to use proper method to compute the insertion loss of the splice points. This is also vital in themanufacture of fiber combiner because the structure must be precisely controlled in order to acquire low insertion lossfor the signal arm of the combiner to ensure the capability of sustaining high power laser.Generally speaking, there are two common methods to compute the insertion loss of splice points: the mode fielddiameter (MFD) and the modal overlap integral (MOI). The MFD method is simple but its accuracy is relatively lower,while the MOI is more accurate than the MFD but also more complicated. We use both two methods to compute theinsertion loss of the signal arm of a (6+1) ×1 fiber combiner. The result shows that the MFD method is appropriate whenthere is only fundamental mode at the splice point. At the mode field matched point, the insertion loss is 0dB when usingthe MFD method while 0.29dB when using the MOI method. This indicates that the MOI method is more accurate thanthe MFD method to predict the minimum insertion loss and the optimal structure. Meanwhile, the MOI method canexplain the different insertion loss for the co-propagating situation and the counter-propagating situation for the fibercombiner which cannot be explained by the MFD method. If there are higher order modes passing through the splicepoint, the MFD method is also inappropriate." @default.
- W2027672960 created "2016-06-24" @default.
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- W2027672960 date "2013-09-17" @default.
- W2027672960 modified "2023-09-23" @default.
- W2027672960 title "The comparison between MFD and MOI on the simulation of combiner insertion loss" @default.
- W2027672960 doi "https://doi.org/10.1117/12.2034473" @default.
- W2027672960 hasPublicationYear "2013" @default.
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