title: Measurement of complex Chi((3)) using degenerate four-wave mixing with an imaged 2-D phase grating.
abstract: We present a simple optical arrangement for phase sensitive detection of degenerate four-wave mixing (DFWM) to characterize the real and imaginary parts of Chi((3)) using an imaged 2-D phase grating. Phase sensitive coherent detection of DFWM signal is demonstrated. Phase stabilization of the interferometric arms is obtained passively with the 2-D grating. A processable polyacetylene sample is characterized at a wavelength of 1.5 microm using this technique. The observed nonlinearity is determined to be a fast (<250 fs) effect using a simple test.
authors.forename: Shuo-Yen
authors.initials: SY
authors.lastname: Tseng
authors.forename: Weilou
authors.initials: W
authors.lastname: Cao
authors.forename: Yi-Hsing
authors.initials: YH
authors.lastname: Peng
authors.forename: Joel M
authors.initials: JM
authors.lastname: Hales
authors.forename: San-Hui
authors.initials: SH
authors.lastname: Chi
authors.forename: Joseph W
authors.initials: JW
authors.lastname: Perry
authors.forename: Seth R
authors.initials: SR
authors.lastname: Marder
authors.forename: Chi H
authors.initials: CH
authors.lastname: Lee
authors.forename: Warren N
authors.initials: WN
authors.lastname: Herman
authors.forename: Julius
authors.initials: J
authors.lastname: Goldhar