title: High sensitivity third-order autocorrelation measurement by intensity modulation and third harmonic detection.
abstract: We demonstrate a novel (to our knowledge) method for high sensitivity measurement of pulsed light at the telecommunication wavelength of 1558 nm using a GaAsP photomultiplier tube. By modulating the input power and analyzing the harmonic components, high sensitivity third-order autocorrelation is obtained in the wavelength and power regimes where a mixture of two-photon absorption and three-photon absorption in the photomultiplier tube is present.
authors.affiliation: School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Yizhen
authors.initials: Y
authors.lastname: Wei
authors.forename: Scott
authors.initials: S
authors.lastname: Howard
authors.forename: Adam
authors.initials: A
authors.lastname: Straub
authors.forename: Zinan
authors.initials: Z
authors.lastname: Wang
authors.forename: Ji
authors.initials: J
authors.lastname: Cheng
authors.forename: Shiming
authors.initials: S
authors.lastname: Gao
authors.forename: Chris
authors.initials: C
authors.lastname: Xu