3kW-level incoherent and coherent mode combining via all-fiber fused Y-couplers

Shamir, Yariv; Zuitlin, Roey; Sintov, Yoav; Shtaif, Mark

doi:10.1364/fio.2012.fw6c.1

Cited by 4 publications

(1 citation statement)

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“…In Ref. [15], Shamir et al reported a 3 kW level incoherently combined laser with a measured power transmission efficiency of 98% using an all-fiber Y-branch combiner, and the M 2 factor of ≤3.5 was measured at a 600 W output level.…”

Section: Introductionmentioning

confidence: 99%

All-fiber 7 × 1 signal combiner for high power fiber lasers

et al. 2015

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We present an all-fiber 7 × 1 signal combiner for high power fiber lasers. Through theoretical analysis, the fabrication method is confirmed and the taper length of the fiber bundle is chosen to be 1 cm to ensure a high transmission efficiency of the combiner. Based on the theoretical results, an all-fiber 7 × 1 signal combiner with high transmission efficiency is fabricated. A capillary with low refractive index is fused around the bundle of signal fibers to make an additional cladding layer. Then the fiber bundle is tapered to match the core of the output fiber and then spliced with the output fiber. The combiner is tested with a 500 W fiber laser and a temperature increase of 13°C/kW without any active cooling is observed in the combiner. The power transmission efficiency is measured to be close to 99% for each input port and the beam quality M 2 is around 10.

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Section: Introductionmentioning

confidence: 99%