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|Author(s):||Florian B. Adler; Scott A. Diddams;|
|Title:||High-power, hybrid Er:fiber/Tm:fiber frequency comb source in the 2 υm wavelength region|
|Published:||May 01, 2012|
|Abstract:||We present a 2-υm frequency comb based on a reliable mode-locked Er:fiber laser with 100 MHz repetition rate. After shifting the spectrum of the amplified Er:fiber comb to longer wavelengths, a single-clad Tm/Ho:fiber is used as a self-pumped pre-amplifier to generate a coherent and broadband spectrum centered at 1.93 υm. Subsequently, a cladding-pumped Tm:fiber amplifier boosts the system to a maximum output power of 4.8 W at 1.96 υm. After compression in a compact grating compressor, our Er:fiber/Tm:fiber hybrid system delivers as much as 2.9 W with a pulse duration of 141 fs. The system‰s comb properties are examined via heterodyne measurement.|
|Pages:||pp. 1400 - 1402|
|Keywords:||fiber amplifiers,fiber lasers,frequency combs,frequency noise,infrared lasers,nonlinear optics,supercontinuum generation,Thulium-doped lasers,ultrashort pulses|