Experimental parabolic pulse generation with an active dispersion decreasing fiber

4paper TuA3.2nonenoneFinot, C.; Guryanov, A.; Sysoliatin, A.; Wabnitz, StefanC., Finot; A., Guryanov; A., Sysoliatin; Wabnitz, Stefa

Pulse generation with dispersion decreasing optical fiber

International audienc

Polarization-maintaining photonic bandgap Bragg fiber

International audienceThe possibility of fabricating a polarization-maintaining Bragg fiber has been studied. It is shown that violation of the cylindrical symmetry of a Bragg mirror in most cases results in a sharp increase in optical loss, which is caused by resonance transmission through the Bragg mirror at wavelengths near the cutoffs of the modes of the high-index rings with a nonzero azimuthal index. It is shown that placing stress-applied parts or air holes inside the Bragg fiber core allows one to avoid this effect. A polarization-maintaining Bragg fiber with perfect light confinement in the core is demonstrated for the first time to our knowledge

Management of the high-order mode content in large (40 µm) core photonic bandgap Bragg fiber laser

International audienc

Polarizing Very-Large-Mode-Area Bragg fiber

International audienc

Single-mode Yb-free Er-doped all-fiber laser cladding-pumped at 976 nm with record efficiency of 40 % and output power of 75W

International audienc

Yb-free Er-doped all-fiber amplifier cladding-pumped at 976 nm with output power in excess of 100 W

In this paper we present results on power scaling of Er-doped fiber amplifier pumped by multimode diodes at 976 nm. Using an optimized active fiber design including a 34 μm single-mode core with proper Er3+ and co-dopant concentrations we obtained an output power of 103 W at 1585 nm for a pump conversion efficiency of 37 % in an amplifier scheme. To the best of our knowledge the output power is the highest power ever reported for Er-doped fiber lasers pumped at 976 n

75 W 40% efficiency single-mode all-fiber erbium-doped laser cladding pumped at 976 nm

International audienceOptimization of Yb-free Er-doped fiber for lasers and amplifiers cladding pumped at 976 nm was performed in this Letter. The single-mode fiber design includes an increased core diameter of 34 μm and properly chosen erbium and co-dopant concentrations. We demonstrate an all-fiber high power laser and power amplifier based on this fiber with the record slope efficiency of 40%. To the best of our knowledge, the achieved output power of 75 W is the highest power reported for such lasers

Millijoule pulse energy 100-nanosecond Er-doped fiber laser

International audienceWe report, for the first time to our knowledge, on a single-mode millijoule-level 100-nanosecond Er-doped fiber laser operating near 1550 nm. The system features a newly developed 35-μm-core Yb-free double-clad Er-doped fiber based on P2O5-Al2O3-SiO2 glass matrix and produces pulses with energy as high as 1 mJ at repetition rates of 1–10 kHz

High power all-fibered femtosecond master oscillator power amplifier at 1.56 μm

International audienceDirect amplification of output from chirped pulse oscillator (CPO) to 3.3 W of average power (pulse energy of 118 nJ in 20 ps pulse duration before compression) was achieved in a properly designed cladding pumped large mode area Er-doped fiber. Various configurations of CPO cavity with different FWHM of output spectrum and pulse duration were investigated. Fourier limit compression with 480 fs pulse duration and 32 kW peak power has been obtained for pulses with 14.8 nm FWHM spectrum. Subsequent nonlinear compression in a standard SMF-28 fiber yielded pulses as short as 145 fs