Measuring temporally complex ultrashort pulses using multiple-delay crossed-beam spectral interferometry.
We introduce a spectral-interferometry (SI) technique for measuring the complete intensity and phase of relatively long and very complex ultrashort pulses. Ordinarily, such a method would require a high-resolution spectrometer, but our method overcomes this need. It involves making multiple measurements using SI (in its SEA TADPOLE variation) at numerous delays, measuring many temporal pulselets within the pulse, and concatenating the resulting pulselets. Its spectral resolution is the inverse delay range--many times higher than that of the spectrometer used. Our simple proof-of-principle implementation of it provided 71 fs temporal resolution and a temporal range of 100 ps using a few-cm low-resolution spectrometer.
Cohen
Jacob
J
Georgia Institute of Technology, School of Physics 837 State St, Atlanta, GA 30332, USA. jcohen7@gatech.edu
Bowlan
Pamela
P
Chauhan
Vikrant
V
Trebino
Rick
R
D000465:Algorithms; D003198:Computer Simulation; D005583:Fourier Analysis; D007368:Interferometry / Q000379:methods*; D015233:Models, Statistical; D055095:Optics and Photonics; D012984:Software; D013053:Spectrophotometry / Q000379:methods; D013997:Time Factors