Toward higher-order passive harmonic mode-locking of a soliton fiber laser.
We report >13 MHz/mW pump power efficiency in increasing the repetition rate of passive harmonic mode-locking by engineering the soliton pulse energy in Er fiber lasers incorporating carbon nanotube saturable absorber. Stable pulses with a ∼5 GHz repetition rate and 40 dB of super-mode suppression are demonstrated with only ∼400 mW pump power in a single-clad fiber laser.
Division of Energy Systems Research, Ajou University, Suwon, 443-749, South Korea.
Chang Su
CS
Jun
Sun Young
SY
Choi
Fabian
F
Rotermund
Byoung Yoon
BY
Kim
Dong-Il
DI
Yeom