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);