Patent ID: 8018979

Claim:
A mode-locked short pulse laser resonator including a pump laser beam input arrangement, a laser medium, and beam outcoupler means, wherein said outcoupler means comprise at least a first outcoupler mirror and a second outcoupler mirror, wherein the first outcoupler mirror has a first multilayer structure and the second outcoupler mirror has a second multilayer structure, wherein the first multilayer structure of the first outcoupler mirror is arranged for coupling out a first portion of laser radiation incident on the first outcoupler mirror, the first portion of the laser radiation having a first spectral bandwidth, and the first multilayer structure of the first outcoupler mirror is arranged for reflecting a second portion of the laser radiation incident on the first outcoupler mirror, wherein the second multilayer structure of the second outcoupler mirror is arranged for coupling out a third portion of laser radiation incident on the second outcoupler mirror, the third portion of the laser radiation having a second spectral bandwidth, and the second multilayer structure of the second outcoupler mirror is arranged for reflecting a fourth portion of the laser radiation incident on the second outcoupler mirror, wherein the first outcoupler mirror and the second outcoupler mirror are resonator mirrors, the first portion of the laser radiation coupled out by the first outcoupler mirror being a first output of the laser resonator and the third portion of the laser radiation coupled out by the second outcoupler mirror being a second output of the laser resonator, wherein the second portion of the laser radiation reflected from the first outcoupler mirror is reflected back into the laser resonator and the fourth portion of the laser radiation reflected from the second outcoupler mirror is reflected back into the laser resonator, and wherein the first spectral bandwidth is broader than the second spectral bandwidth.