title: Mid-infrared supercontinuum generation spanning 2.0 to 15.1  μm in a chalcogenide step-index fiber.
abstract: We experimentally demonstrate mid-infrared (MIR) supercontinuum (SC) generation spanning ∼2.0 to 15.1 μm in a 3 cm-long chalcogenide step-index fiber. The pump source is generated by the difference frequency generation with a pulse width of ∼170  fs, a repetition rate of ∼1000  Hz, and a wavelength range tunable from 2.4 to 11 μm. To the best of our knowledge, this is the broadest MIR SC generation observed so far in optical fibers. It facilitates fiber-based applications in sensing, medical, and biological imaging areas.
authors.forename: Tonglei
authors.initials: T
authors.lastname: Cheng
authors.forename: Kenshiro
authors.initials: K
authors.lastname: Nagasaka
authors.forename: Tong Hoang
authors.initials: TH
authors.lastname: Tuan
authors.forename: Xiaojie
authors.initials: X
authors.lastname: Xue
authors.forename: Morio
authors.initials: M
authors.lastname: Matsumoto
authors.forename: Hiroshige
authors.initials: H
authors.lastname: Tezuka
authors.forename: Takenobu
authors.initials: T
authors.lastname: Suzuki
authors.forename: Yasutake
authors.initials: Y
authors.lastname: Ohishi