22 February 2017 High power, ultra-broadband supercontinuum source based on highly GeO2 doped silica fiber
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Abstract
We demonstrate a 74 mol % GeO2 doped fiber for mid-infrared supercontinuum generation. Experiments ensure a highest output power for a broadest spectrum from 700nm to 3200nm from this fiber, while being pumped by a broadband 4 stage Erbium fiber based MOPA. The effect of repetition rate of pump source and length of Germania-doped fiber has also been investigated.

Further, Germania doped fiber has been pumped by conventional Silica based photonic crystal fiber supercontinuum source. At low power, a considerable broadening of 200-300nm was observed. Further broadening of spectrum was limited due to limited power of pump source. Our investigations reveal the unexploited potential of Germania doped fiber for mid-infrared supercontinuum generation. This measurement ensures a possibility of Germania based photonic crystal fiber or a step-index fiber supercontinuum source for high power ultra-broad band emission being pumped a 1060nm or a 1550nm laser source. To the best of our knowledge, this is the record power, ultra-broadband, and all-fiberized SC light source based on Silica and Germania fiber ever demonstrated to the date.
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Deepak Jain, Raghuraman Sidharthan, Peter M. Moselund, Seongwoo Yoo, Daryl Ho, Ole Bang, "High power, ultra-broadband supercontinuum source based on highly GeO2 doped silica fiber", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 1008318 (22 February 2017); doi: 10.1117/12.2251648; https://doi.org/10.1117/12.2251648
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