The latest thing in Spark Plugs

[loquin]

is Lasers... You'll fire lasers into the fuel/air mix to kick things off, instead of high voltage.

 

[Dennis Becraft]

lasers for spark plugs

I wonder if an additive that darkens the fuel or otherwise maximally absorbs the light could be of benefit here?

 

[motorpsycho]

The trick is going to be finding fuel that will react with the lasers wavelength.