Abstract
In this paper, we extend the recently introduced linear technique for temporal
phase reconstruction using optical ultrafast differentiation (PROUD) to achieve full
characterization of ultrashort optical pulses with durations down to the picosecond
regime using a well-characterized temporal stretcher (e.g., dispersive optical fiber).
The proposed method is experimentally demonstrated by precisely characterizing the
amplitude and phase temporal profiles of microwatt-power picosecond pulses ranging from
4 to 20ps with both continuous and discrete temporal phase variations. Using this simple
mechanism, the same PROUD setup can be used to characterize optical pulses with
durations ranging from the picosecond to the nanosecond regime. We provide a
comprehensive mathematical analysis of this general PROUD technique: we evaluate in
detail the influence of the key specifications (e.g., different sources of noise) of the
used components and instruments, namely, optical differentiator, linear temporal
stretcher, and time-domain intensity test equipment, on the performance of the PROUD
measurement system, particularly in terms of phase sensitivity in the optical pulse
characterization.
© 2009 IEEE
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