Abstract
A semiconductor photoinduced electromotive-force detector is used to measure the square of the electric-field correlation of nominal 100-fs laser pulses. For transform-limited pulses, this measurement gives the intensity correlation and thus directly gives the pulse width. The photoinduced electromotive-force technique using semi-insulating GaAs:Cr performs detection that is linear in intensity, making it possible to characterize weak femtosecond pulses with an average power of microwatts.
© 1998 Optical Society of America
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