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Complete temporal pulse characterization based on phase reconstruction using optical ultrafast differentiation

Fangxin Li¹, Yongwoo Park, José Azaña

¹Institut National de la Recherche Scientifique, Montréal, Québec H5A 1K6, Canada. fangxin@emt.inrs.ca

|November 21, 2007

Summary

A new technique recovers optical waveform phase profiles using temporal intensity measurements. This method employs an optical time differentiator for unambiguous phase recovery, applicable to various time scales.

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Area of Science:

Optics and Photonics
Ultrafast Science
Signal Processing

Background:

Characterizing optical waveforms is crucial for advanced photonic applications.
Existing phase recovery methods can be complex or limited in scope.

Purpose of the Study:

To introduce a simple and general technique for recovering the phase profile of optical waveforms.
To experimentally demonstrate the proposed phase recovery method.

Main Methods:

Measuring temporal intensity profiles at the input and output of a linear optical time differentiator.
Utilizing a direct, noniterative algorithm for phase profile reconstruction.

Main Results:

Successfully demonstrated unambiguous recovery of signal phase profiles.

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The technique is applicable to optical waveforms with durations from subpicosecond to nanosecond regimes.

Conclusions:

The proposed method offers a straightforward and versatile approach to optical waveform phase recovery.
The technique's compatibility with readily available ultrafast optical differentiators enhances its practical applicability.