Abstract
A solid-core tellurite glass fiber with loss at was made by using the built-in casting preform fabrication method and rod-in-tube fiber drawing technique. Pumping a fiber piece with picosecond pulses of 3–, 0.1% of the fundamental power limited by the coherence length of 0.3– was converted into visible third-harmonic power tunable over a broad near-IR wavelength ranging from 1500 to . Frequency conversion from the mid-IR to near-IR was found to be even more efficient due to the longer coherence lengths of 12– in the wavelength range of 2200–.
© 2011 Optical Society of America
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