Fittinghoff DN, Bowie JL, Sweetser JN, Jennings RT, Krumbüugel MA, Delong KW, Trebino R, Walmsley IA. Measurement of the intensity and phase of ultraweak, ultrashort laser pulses.
OPTICS LETTERS 1996;
21:884-886. [PMID:
19876191 DOI:
10.1364/ol.21.000884]
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Abstract
We show that frequency-resolved optical gating combined with spectral interferometry yields an extremely sensitive and general method for temporal characterization of nearly arbitrarily weak ultrashort pulses even when the reference pulses is not transform limited. We experimentally demonstrate measurement of the full time-dependent intensity and phase of a train of pulses with an average energy of 42 zeptojoules (42 x 10(-21) J), or less than one photon per pulse.
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