Temporally modulated phase retrieval method for weak temporal phase measurement of laser pulses

摘要

The measurement of weak temporal phase for picosecond and nanosecond laserpulses is important but quite difficult. We propose a simple iterativealgorithm, which is based on a temporally movable phase modulation process, toretrieve the weak temporal phase of laser pulses. This unambiguous method canachieve a high accuracy and simultaneously measure the weak temporal phase andtemporal profile of pulses, which are almost transform-limited. Detailedanalysis shows that this iterative method has valuable potential applicationsin the characterization of pulses with weak temporal phase.