Abstract

A solid-core tellurite glass fiber with 1.8dB/m loss at 1.55μm was made by using the built-in casting preform fabrication method and rod-in-tube fiber drawing technique. Pumping a 10cm fiber piece with picosecond pulses of 3–5×1012W/cm2, 0.1% of the fundamental power limited by the coherence length of 0.3–5μm was converted into visible third-harmonic power tunable over a broad near-IR wavelength ranging from 1500 to 1680nm. Frequency conversion from the mid-IR to near-IR was found to be even more efficient due to the longer coherence lengths of 12–20μm in the wavelength range of 2200–2500nm.

© 2011 Optical Society of America

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