Shot noise limited characterization of ultraweak femtosecond pulse trains

Osip Schwartz*, Oren Raz, Ori Katz, Nirit Dudovich, Dan Oron

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Ultrafast science is inherently, due to the lack of fast enough detectors and electronics, based on nonlinear interactions. Typically, however, nonlinear measurements require significant powers and often operate in a limited spectral range. Here we overcome the difficulties of ultraweak ultrafast measurements by precision time-domain localization of spectral components. We utilize this for linear self-referenced characterization of pulse trains having ∼ 1 photon per pulse, a regime in which nonlinear techniques are impractical, at a temporal resolution of ∼ 10 fs. This technique does not only set a new scale of sensitivity in ultrashort pulse characterization, but is also applicable in any spectral range from the near-infrared to the deep UV.

Original languageAmerican English
Pages (from-to)679-686
Number of pages8
JournalOptics Express
Issue number2
StatePublished - 17 Jan 2011
Externally publishedYes


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