Frequency doubling of femtosecond erbium-fiber soliton lasers in periodically poled lithium niobate.
We report efficient frequency doubling of passively mode-locked femtosecond erbium-fiber lasers. Quasi-phase-matched second-harmonic generation in periodically poled lithium niobate is used to generate 8.1 mW of 190-fs (FWHM), 90-pJ pulses at 777 nm with a conversion efficiency greater than can be obtained with existing birefringently phase-matched nonlinear materials. A dispersion-compensation-free soliton oscillator generating transform-limited 230-fs (FWHM) pulses at 1554 nm is used as a pump laser.
Arbore
M A
MA
Fejer
M M
MM
Fermann
M E
ME
Hariharan
A
A
Galvanauskas
A
A
Harter
D
D