Laser device for ignition device of internal combustion engine of motor vehicle, has beam splitter arranged in beam path of laser pulses, where lateral part of cross-section of laser pulse strike surfaces of beam splitter

The device (26) has a beam splitter arranged in a beam path of laser pulses (24.1, 24.2) that are emitted by an optical resonator, where the beam splitter includes two inclined surfaces. A lateral part of a cross-section of the laser pulse strikes the surfaces of the beam splitter. A combustion chamber window is arranged in housing together with the optical resonator and the beam splitter. The beam splitter is designed as a prism with two prism surfaces. The chamber window is designed as a spherical lens, where the window and the splitter are made of quartz glass. Lasereinrichtung für eine Zündeinrichtung einer Brennkraftmaschine, umfassend einen optischen Resonator, dadurch gekennzeichnet, dass in dem Strahlengang des von dem optischen Resonator emittierten Laserimpulses (24) ein Strahlteiler (60) angeordnet ist, der mehrere untereinander geneigte Flächen (62.1, 62.2, 62.3, ...) aufweist, die jeweils von einem lateralen Teil des Querschnitts des Laserimpuls (24) getroffen werden.