title: Raman effects in a highly nonlinear holey fiber: amplification and modulation.
abstract: We experimentally demonstrate that a short length of highly nonlinear holey fiber (HF) can be used for strong L(+) -band (1610-1640-nm) Raman amplification and ultrafast signal modulation. We use a pure silica HF with an effective area of just 2.85mum(2) at 1550 nm, which yields an effective nonlinearity ~15 times higher than in conventional silica dispersion-shifted fiber. Using a 75-m length of this fiber, we obtained internal Raman gains of more than 42 dB and a noise figure of ~6 dB under a forward single-pump scheme, and the Raman gain coefficient was experimentally estimated to be 7.6 chi 10(-14)m/W . Also, an 11-dB signal extinction ratio in a Raman-induced all-optical modulation experiment was achieved with the same fiber.
authors.forename: Z
authors.initials: Z
authors.lastname: Yusoff
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: W
authors.initials: W
authors.lastname: Belardi
authors.forename: T M
authors.initials: TM
authors.lastname: Monro
authors.forename: P C
authors.initials: PC
authors.lastname: Teh
authors.forename: D J
authors.initials: DJ
authors.lastname: Richardson