Monday, February 27, 2012

Measurement techniques

Several techniques are accessible to admeasurement ultrashort optical pulses:

acuteness autocorrelation: gives the beating amplitude if a accurate beating appearance is assumed.

ashen interferometry (SI): a beeline address that can be acclimated if a pre-characterized advertence beating is available. Gives the acuteness and phase. The algorithm that extracts the acuteness and appearance from the SI arresting is direct.

Ashen appearance interferometry for absolute electric-field about-face (SPIDER): a nonlinear self-referencing address based on ashen shearing interferometry. The adjustment is agnate to SI, except that the advertence beating is a spectrally confused replica of itself, acceptance one to access the ashen acuteness and appearance of the delving beating via a absolute FFT clarification accepted agnate to SI, but which requires affiliation of the appearance extracted from the interferogram to access the delving beating phase.

Frequency-resolved optical gating (FROG): a nonlinear address that yields the acuteness and appearance of a pulse. It's just a spectrally bound autocorrelation. The algorithm that extracts the acuteness and appearance from a FROG trace is iterative.

Grating-eliminated common ascertainment of ultrafast adventure laser ablaze e-fields (GRENOUILLE), a simplified adaptation of FROG.

Methods of anecdotic and authoritative the ultrashort optical pulses:

MIIPS Multiphoton Intrapulse Interference Appearance Scan, a adjustment to characterize and dispense the ultrashort pulse.


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