We introduce and numerically demonstrate a simple and general concept for direct reconstruction of the temporal phase profile of an optical signal from temporal intensity measurements at the input and output of an arbitrary linear optical filter. The concept is based on exploiting the linearity and causality properties of any physical filter. Very few restrictions need to be imposed on the optical filter response to ensure an unambiguous phase reconstruction. The filter can be specifically designed to minimize the noise influence on the measurement process.
© 2012 Optical Society of America
Fourier Optics and Signal Processing
Original Manuscript: March 27, 2012
Revised Manuscript: May 31, 2012
Manuscript Accepted: July 4, 2012
Published: August 23, 2012
Mohammad H. Asghari and José Azaña, "Self-referenced temporal phase reconstruction from intensity measurements using causality arguments in linear optical filters," Opt. Lett. 37, 3582-3584 (2012)