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Abstract
We report results of a high precision phase estimation based on a weak measurements
scheme using commercial light-emitting diode. The method is based on a measurement
of the imaginary part of the weak value of a polarization operator. The imaginary
part of the weak value appeared due to the measurement interaction itself. The sensitivity
of our method is equivalent to resolving light pulses of order of attosecond and it
is robust against chromatic dispersion.