Abstract: An ignition device, in particular for an internal combustion engine of a motor vehicle, having a laser device for generating laser pulses, and having an optical fiber device which is at least optically connected to the laser device for supplying the laser device with pumped light. The optical fiber device is configured and situated in the region of the laser device in such a way that radiation incident in the region of the laser device and/or in the region of a combustion chamber associated with the laser device may be injected into the optical fiber device. The disclosed configuration of the optical fiber device advantageously allow the radiation which is injected into the optical fiber device to be analyzed, in particular using a detector which is remotely situated, without having to provide additional, separate optical fiber devices for the radiation to be analyzed, because the radiation to be analyzed may be conducted directly via the same optical fiber that is already used for supplying pumped light.

Abstract: A laser module includes a housing and at least one laser device situated in the housing for generating laser pulses. The laser module has at least one primary sealing region and a secondary sealing region that is situated at least partially in the primary sealing region, and the laser device is situated within the secondary sealing region.

Abstract: A laser device of a so-called laser ignition is provided, in which the heat dissipation is improved between a combustion chamber window and a housing, and the cooling or temperature of the combustion chamber window is able to be adjusted within broad limits by simple modifications.

Abstract: An ignition laser for an internal combustion engine is provided, wherein the combustion chamber window is connected to a housing of the ignition laser in a gas-, pressure-, and temperature-resistant manner.

Abstract: A method is described for operating an ignition device, in particular in an internal combustion engine, having a combustion chamber window for optically connecting the ignition device to a combustion chamber. An optical signal which may be detected in the region of the combustion chamber window is evaluated to deduce a state of the combustion chamber window. In particular, soiling of the combustion chamber window may be identified in this manner.

Abstract: A laser ignition arrangement for an internal combustion engine (1) comprising a laser light generating device (3) and a combustion chamber window (7, 7?) through which laser light (5) for ignition of a combustible mixture can be introduced into a combustion chamber (11) of the internal combustion engine (1), wherein the laser light generating device (3) is suitable for introducing laser light of an intensity (I) of at most 0.15 mJ/mm2 or at least 3 mJ/mm2 into the combustion chamber (11), wherein the intensity (I) can be attained on a side of the clean combustion chamber window (7, 7?), which side is towards the combustion chamber (11).

Abstract: An internal combustion engine has a laser light generating device. The laser light generating device is suitable for delivering laser light with a transverse mode structure which varies in respect of time.

Abstract: Lens for a laser-ignited internal combustion engine, with an at least approximately spherical basic shape, the lens (1) having an aspherical region (3) which is formed so that the lens (1) is at least approximately free from spherical aberration.