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Successful design of new ceramic laser

Jan 30, 2019

Introducing two or three lasers into the engine cylinder and adjusting the depth to ignite the oil and gas mixture in the engine. The laser that can replace the spark plug for the ignition of the car engine was designed by a team of Romanians and Japanese. It will be announced at the Laser and Optoelectronics Conference on May 1.

Conventional spark plugs can only ignite the oil and gas mixture near the spark gap, so the combustion efficiency is not high, and the metal of the spark plug is also prone to corrosion. But newer lasers can ignite more mixtures, increasing engine efficiency and reducing pollution.

In the past, lasers that met these requirements were mostly cumbersome, inefficient, and unstable. Only small lasers can make this laser ignition technology practical.

To solve this problem, the research team adopted a new approach: the ceramic powder was made into a laser and then loaded into a spark plug-sized cylinder. This increases the thoroughness of the combustion and subtly avoids the problem of burning decay over time.

These small, low-power lasers deliver energy through optical fibers, and their pulse intervals are as short as 800 seconds per trillion. Compared to the spar normally used in high-energy laser devices, this laser is more robust and better able to cope with the heat generated by engine combustion.