title: Widely tunable second-harmonic generation in a chalcogenide-tellurite hybrid optical fiber.
abstract: When a chalcogenide-tellurite hybrid optical fiber with a high refractive index difference Δn=0.24 is pumped by an optical parametric oscillator with a pump wavelength from 1700 to 3000 nm, widely tunable second-harmonic generation (SHG) from 850 to 1502 nm is obtained. The observation of SHG is primarily due to the surface nonlinearity polarization at the core-cladding interface and the second-harmonic signal remains stable at the maximal level throughout the laser pulse irradiation.
authors.forename: Tonglei
authors.initials: T
authors.lastname: Cheng
authors.forename: Weiqing
authors.initials: W
authors.lastname: Gao
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Kawashima
authors.forename: Dinghuan
authors.initials: D
authors.lastname: Deng
authors.forename: Meisong
authors.initials: M
authors.lastname: Liao
authors.forename: Morio
authors.initials: M
authors.lastname: Matsumoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Misumi
authors.forename: Takenobu
authors.initials: T
authors.lastname: Suzuki
authors.forename: Yasutake
authors.initials: Y
authors.lastname: Ohishi