Patent ID: 7496117

Claim:
A laser arrangement comprising: a gain fiber to provide nonlinear amplification, the gain fiber having a first end and a second end; a dispersion adaptation fiber having a first end and a second end, an output coupler, the first end of the dispersion adaptation fiber being connected to the first end of the gain fiber, and the second end of the dispersion adaptation fiber being connected to the second end of the gain fiber, thereby forming a laser cavity, the dispersion adaptation fiber having a length in relation to a length of the gain fiber such that the laser cavity has a net group velocity dispersion which is positive or below a predetermined threshold, and the dispersion adaptation fiber further comprising a compression fiber providing nonlinear compression and having a first end and a second end, the first end of the compensation fiber being connected to one end of the gain fiber and the second end of the compensation fiber being connected to the output coupler, the output coupler being positioned at a predetermined distance away from the gain fiber such that a generated pulse has a substantially narrowest pulse width in the laser cavity.