Is there anyway to inject a laser pulse in 1 timestep?

[zhazhajust]

I want to init a laser pulse, but just found the only way is laser antenna injection. Is there anyway to inject it in one timestep so that not a backward laser pulse generate?

[RemiLehe]

Thanks for the question.
There is no such option in WarpX currently. The only way to inject a laser is with the laser antenna.