P. Repgen
B. Schuhbauer
M. Hinkelmann
D. Wandt
A. Wienke
U. Morgner
J. Neumann
D. Kracht

Dispersion-managed thulium-doped fiber Mamyshev oscillator

Photonics West: LASE
06.-11. März
Type: Konferenzbeitrag
The principle of a Mamyshev oscillator depends on alternating spectral filtering between sections of spectral broadening by self-phase modulation. In the 2 µm wavelength range, this concept faces the difficulty that standard fibers are anomalous dispersive which limits the possible pulse energy to the pJ-regime without proper dispersion management. We applied ultra-high numerical aperture fibers with normal dispersion in order to achieve up-chirped pulses in an anomalous dispersive Thulium-doped gain fiber. With that design, we achieved mode-locked pulses with energies of 6.4 nJ and a compressed autocorrelation duration of 195 fs at a repetition rate of 16 MHz.