title: Observation of quadratic spatial solitons in periodically poled lithium niobate.
abstract: We report what are to our knowledge the first observation and characterization of quadratic spatial solitons in periodically poled lithium niobate (PPLN). Using a Nd:YAG (1064-nm) source, we observed self-trapped solitary-wave propagation over more than six diffraction lengths as a result of the cascaded quadratic nonlinear process. Low-threshold operation (5-kW peak power) was measured for the quasi-phase-matched PPLN structure designed for frequency doubling.
authors: B
authors: B
authors: Bourliaguet
authors: V
authors: V
authors: Couderc
authors: A
authors: A
authors: Barthélémy
authors: G W
authors: GW
authors: Ross
authors: P G
authors: PG
authors: Smith
authors: D C
authors: DC
authors: Hanna
authors: C
authors: C
authors: De Angelis