High-energy femtosecond Yb-doped all-fiber monolithic chirped-pulse amplifier at repetition rate of 1 MHz

Abstract

A high-energy femtosecond all ytterbium fiber amplifier based on a chirped-pulse amplification (CPA) technique at a repetition rate of 1 MHz seeded by a dispersion-management mode-locked picosecond broadband oscillator is studied. We find that the compressed pulse duration is dependent on the amplified energy, the pulse duration of 804 fs corresponds to the maximum amplified energy of 10.5 µJ, while the shortest pulse duration of 424 fs corresponds to the amplified energy of 6.75 µJ. The measured energy fluctuation is approximately 0.46% root mean square (RMS) over 2 h. The low-cost femtosecond fiber laser source with super-stability will be widely used in industrial micromachines, medical therapy, and scientific studies.

A cladding-pumping based power-scaled noise-like and dissipative soliton pulse fiber laser

“…[30] Therefore, reasonably increasing the mode-field diameter is an effective method for scaling the average power and pulse energy, and alleviating nonlinearity. [31,32] Moreover, combiner fused spliced cladding pumping employing high-power multimode laser diodes has also been proved to be a viable method to significantly enhance the pump capacity and laser gain factor. [33] Therefore, in consideration of its inherent performance advantages and potential application prospects, we conduct research on the generation of a high-average-power modelocked NLP in a large-core-diameter flexible fiber-based laser configuration, in which a cladding pumping scheme with a high-power multimode laser diode has been utilized to significantly promote the power increase.…”

Generation of wideband tunable femtosecond laser based on nonlinear propagation of power-scaled mode-locked femtosecond laser pulses in photonic crystal fiber*

“…Over the last several decades, ultrashort pulse lasers with diverse laser characteristics [1][2][3] have been extensively studied and developed so as to meet multifarious requirement of fundamental science and application fields. [4,5] In addition to power scaling, [6] energy increment, [7] and pulse shortening, [8] wavelength tuning of the laser source is also an important research subject for laser community, which enables wide use of ultrafast lasers in different fields of discipline.…”

Generating 84 fs, 4 nJ directly from an Yb-doped fiber oscillator by optimization of the net dispersion

“…As an alternative to bulk solid-state oscillators, the fiber oscillator is more compact, more stable and free from misalignment. Moreover, the pulse energy of several nanojoules, or higher levels, from the fiber oscillator is no longer a problem [4][5][6].…”