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High Absorption Low NA Step Index Large-Mode-Area Fiber for High Power Ultrafast Lasers

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Abstract

We report fabrication of >20dB/m cladding absorption step-index LMA fiber with low core NA(<0.07) suitable for ultra-fast fiber lasers. Above 58W output power with a slope efficiency of ~80% was demonstrated in only 0.5m fiber.

© 2019 The Author(s)

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