Innovative single-shot 2D pulse front tilt diagnostic

The presence of pulse front tilt(PFT),caused by angular dispersion(AD) in femtosecond laser pulses,could degrade the performance of the laser system and/or impact the experimental yields.We present a single-shot diagnostic capable of measuring the AD in the x-y plane by adopting an intensity mask.It can be applied to stretched pulses,making it ideal for diagnosing the AD along the amplification chain of a high-power laser system,and to ultrashort pulses exiting from an optical compressor.In this way,it can help in properly characterizing a laser pulse before it is delivered to the target area.In this Letter,we present experimental evidence of AD retrieval for different compression configurations,supported by theoretical analysis.