S2 Mode Content Measurement of a 7+1 to 1 Backward Pump-Signal Combiner
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L. Bansal, R. Sienkowski, C. Neale, J. Mann, J. W. Nicholson
In this work we report a -24dB LP11 mode suppression in a 7+1 to 1 Backward Pump-Signal Combiner. The mode content is measured using the S2 -Measurement technique. The high signal beam quality is attributed to a low overlap splice loss between the Tapered Fiber Bundle and the output fiber. The combiner output fiber is large mode area with a LP01 mode effective area of 584 um2 .