Abstract

All-fiber signal combiner is a key component for augmenting the fiber laser power. Presently the reported 7×1 signal combiners are all have output fibers with core diameters larger than 100 μm. In order to improve the beam quality of the combiner, a fiber with smaller core of 50 μm diameter is chose to be the output fiber. An all-fiber 7×1 signal combiner is fabricated with measured power transmission efficiency around 99% for each port. The beam quality is improved and the measured M² are around 6 which are matched well with the theoretically calculated results.

© 2015 Chinese Laser Press

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