Generation of 28-fs pulses from a mode-locked ytterbium fiber oscillator

Abstract

An ultrashort-pulse, mode-locked ytterbium-doped fiber laser has been developed. The group-delay dispersion was compensated with a grating pair inside the cavity. A broad spectrum from 1000-nm to 1120-nm was obtained without intracavity compensation of third-order dispersion. A 0.7-nJ pulse as short as 28.3 fs was obtained with a repetition rate of 80 MHz. To our knowledge, this is the shortest pulse reported from an Yb fiber laser oscillator.

Modeling Frequency Comb Sources

“…If the output pulse of a laser is chirped, then it has to be de-chirped outside the cavity by prisms or grating pairs. However, even with careful design and fine tuning, these components can only compensate the group velocity dispersion and the third order dispersion (TOD) [91,92]. It is very hard to compress a pulse with complex chirp profile.…”

Actively Q-switched mode-locked Yb-doped fiber laser with high mode-locking contrast

“…Various actively and pas sively mode locked methods including the semicon ductor optical amplifier (SOA) [6], nonlinear polar ization evolution (NPE), figure eight laser scheme [7,8], semiconductor saturable absorber mirror [9] and saturable absorbers such as graphene [10] and carbon nanotubes [11] are experimentally demonstrated. To take the advantage of the relatively wide gain band width of Yb ions, ultrashort pulse generation in YDFLs by NPE method has revealed the wide wave length tunability [12] and can produce about 50 and 28 fs short pulsewidth with proper dispersion compensa tion [13,14].…”

Enhanced spectral breathing for sub-25 fs pulse generation in a Yb-fiber laser

“…To date, laser pulses as short as ∼30 fs can be routinely obtained from dispersion-managed soliton Yb fiber lasers operating in the vicinity of zero cavity dispersion [4,5]. Similar performance can be achieved from all normal dispersion fiber lasers by downscaling of active fiber length [6].…”