Description
We present an in-line, attosecond-stable, ultrathin glass plate autocorrelator, which is capable of measuring few-cycle femtosecond (fs) pulses with ease using a phone camera. The device consists of a pair of micrometer thin identical glass plates that split the incident wavefront of femtosecond pulses with attosecond-resolved time delay between them . Its performance is validated by accurate measurement of two kinds of femtosecond pulses: (i) pulses having about 0.3 mJ energy per pulse and (ii) pulses having 2 nJ energy using a phone camera and homemade software. The device finds many application such as to characterize few-cycle pulses entering space-constrained or alignment-sensitive situations such as ultrafast microscopy and attosecond pump–probe spectroscopy setups.
