We report octave-spanning spectrum generated in a tapered silica photonic crystal fiber by a mode-locked Yb:fiber ring laser at a repetition rate as high as 528 MHz. The output pulses from this laser were compressed to 62 fs. By controlling the hole expansion and core diameter, a silica PCF was tapered to 20 cm with an optimal d/Λ ratio of 0.6. Pulses with the energy of 280 pJ and the peak power of 4.5 kW were injected into the tapered fiber and the pulse spectrum was expanded from 500 to 1600 nm at the level of −30 dB.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: November 19, 2012
Revised Manuscript: December 17, 2012
Manuscript Accepted: December 21, 2012
Published: February 8, 2013
Tongxiao Jiang, Guizhong Wang, Wei Zhang, Chen Li, Aimin Wang, and Zhigang Zhang, "Octave-spanning spectrum generation in tapered silica photonic crystal fiber by Yb:fiber ring laser above 500 MHz," Opt. Lett. 38, 443-445 (2013)