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Publication Citation: High-power, hybrid Er:fiber/Tm:fiber frequency comb source in the 2 υm wavelength region

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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.
Citation: Optics Letters
Volume: 37
Issue: 9
Pages: pp. 1400 - 1402
Keywords: fiber amplifiers;fiber lasers;frequency combs;frequency noise;infrared lasers;nonlinear optics;supercontinuum generation;Thulium-doped lasers;ultrashort pulses
Research Areas: Physics