116-fs soliton source based on an Er-Yb codoped waveguide amplifier

A passively mode-locked soliton ring fiber laser is investigated that utilizes a 4.5-cm erbium-ytterbium (Er-Yb) codoped waveguide amplifier as the gain element. The resulting short cavity (1.3 m of fiber) eliminates multipulsing behaviour and reduces the effects of resonant sidebands, enabling generation of 116-fs solitons with a pulse energy of 160 pJ at a fundamental repetition rate of 130 MHz.