Patent ID: 7903705

Claim:
A short-pulse laser arrangement comprising: a resonator comprising resonator components including a laser crystal, a plurality of mirrors including a pump beam coupling-in mirror, a laser beam out-coupling mirror and a multiple reflection telescope for enlarging an effective length of the resonator, a first set of the resonator components having a positive group delay dispersion; said plurality of mirrors including dispersive mirrors with a negative group delay dispersion for compensating in part the positive group delay dispersion of the first set of the resonator components; said resonator in operation having a positive net averaged group delay dispersion over an operating wavelength range and the net averaged group delay dispersion is constant over the operating wavelength range, the resonator in operation generating laser pulses having an energy higher than 200 nJ, wherein the positive net averaged group delay dispersion of the resonator is in a range between 0 and 100 fs 2 .