Ignition device in particular for an internal combustion engine, and method for manufacturing same

An ignition device, for an internal combustion engine of a motor vehicle, comprising:

• a laser device for generating laser pulses;
• an optical fiber device which is at least optically connected to the laser device for supplying the laser device with pumped light, wherein the optical fiber device is configured and situated in a region of the laser device so that radiation incident at least one of in the region of the laser device and in a region of a combustion chamber associated with the laser device may be injected into the optical fiber device;
• wherein the optical fiber device has multiple optical fibers, wherein at least a first portion of the optical fibers is provided in the region of the laser device so that the radiation incident at least one of in the region of the laser device and in the region of the combustion chamber may be injected into this portion of the optical fibers;
• wherein at one end of the optical fiber device, situated at a distance from the laser device, an optical cross-section converter is provided which fixes the individual optical fibers of the optical fiber system relative to one another in a specifiable manner, so that the individual optical fibers in the optical cross-section converter together form a cross section which differs from the cross section of the optical fiber device.

A method for manufacturing an ignition device for an internal combustion engine of a motor vehicle, the method comprising:

• forming an optical fiber device from multiple individual optical fibers in particular combined into a strand;
• and
• providing a laser device for generating laser pulses, and the optical fiber device which is at least optically connected to the laser device for supplying the laser device with pumped light;
• wherein at least a first portion of the optical fibers is situated in a region of the laser device so that radiation incident at least one of in the region of the laser device and in the region of a combustion chamber associated with the laser device may be injected into the first portion of the optical fibers;
• wherein in a partial region of its overall length the optical fiber device is bent according to a specifiable bending radius so that in the partial region, radiation conducted from the optical fiber device may be at least partially extracted from the optical fiber device.