Abstract
We report a novel, Tm-doped photonic crystal fiber (PCF) actively -switched oscillator that provides peak power with 435 µJ, 49 ns pulses at 10 kHz repetition rate at 2 μm wavelength. This fiber has a mode-field area , the largest of any flexible PCF providing diffraction-limited beam quality to the best of our knowledge. As an application, the oscillator is used as pump to generate broadening in of SMF-28 fiber.
©2012 Optical Society of America
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