A company called Carinthian Tech Research (CTR) has developed a laser that can be used for engine ignition systems. Light is compressed to create a laser pulse, which because of the high energy density it generates plasma, which ignites the fuel. See the lightning spot in the video at: http://www.ctr.at/en/r-d-technologies/laser.html
“When CTR developed a highly specialised laser for ignition systems in jet and internal combustion engines, we took the technology to a new level globally. To achieve this, we had to redesign all the laser components from the pump diodes to the resonator and laser rod, integrating them in a compact housing. The resultant opportunities for using the laser in very confined spaces and environments subject to vibrations, is so unique and innovative that even projects with the ESA for applications in the aerospace industry are being implemented.” CTR 2012
More information: http://www.ctr.at/en/r-d-technologies/laser.html