Angela Camerlingo

Single-mode tellurite glass holey fiber with extremely large mode area for infrared nonlinear applications

We report the fabrication of a large mode area tellurite holey fiber from an extruded preform, with a mode area of 3000microm(2). Robust single-mode guidance at 1.55microm was confirmed by both optical measurement and numerical simulation. The propagation loss was measured as 2.9dB/m at 1.55microm. A broad and flat supercontinuum from 0.9 to 2.5microm with 6mW output was obtained with a 9cm length of this fiber.

Dispersion-shifted all-solid high index-contrast microstructured optical fiber for nonlinear applications at 1.55µm

We report the fabrication of an all-solid highly nonlinear microstructured optical fiber. The structured preform was made by glass extrusion using two types of commercial lead silicate glasses that provide high index-contrast. Effectively single-moded guidance was observed in the fiber at 1.55 microm. The effective nonlinearity and the propagation loss at this wavelength were measured to be 120 W(-1)km(-1) and 0.8 dB/m, respectively. Numerical simulations indicate that the fiber is dispersion-shifted with a zero-dispersion-wavelength of 1475 nm and a dispersion slope of 0.16 ps/nm(2)/km respectively at 1.55 microm. These predictions are consistent with the experimentally determined dispersion of + 12.5 ps/nm/km at 1.55 microm. Tunable and efficient four-wave-mixing based wavelength conversion was demonstrated at wavelengths around 1.55 microm using a 1.5m-length of the fiber.

Near-zero dispersion, highly nonlinear lead-silicate W-type fiber for applications at 1.55µm

We report the design, fabrication and characterization of a lead-silicate glass highly nonlinear W-type fiber with a flattened and near-zero dispersion profile in the 1.55 microm region. The fiber was composed of three types of commercial lead silicate glasses. Effectively single-mode guidance was observed in the fiber at 1550 nm. The nonlinear coefficient and the propagation loss at this wavelength were measured to be 820 W(-1)km(-1) and 2.1 dB/m, respectively. Investigations of the Brillouin threshold revealed no evidence of stimulated Brillouin scattering for continuous wave signal powers up to 29 dBm in a 2m sample of the fiber. A broadband dispersion measurement confirmed the near-zero dispersion values and the flat dispersion profile around 1550 nm, in good agreement with our simulations. Efficient four-wave-mixing, tunable across the whole C-band, was demonstrated in a 2.2m length of the fiber.

Wavelength Conversion in a Short Length of a Solid Lead–Silicate Fiber

We experimentally demonstrate a four-wave-mixing-based wavelength conversion scheme at 1.55 ¿m using a 1.1-m length of highly nonlinear, dispersion tailored W-type lead-silicate optical fiber.

Dispersion Management in Highly Nonlinear, Carbon Disulfide Filled Holey Fibers

We study various fiber designs which incorporate a highly nonlinear liquid, carbon disulfide, with the aim of designing a structure with the highest possible nonlinearity and at the same time a low and flattened dispersion at telecom wavelengths, as required for many all-optical processing devices. We observe that soft glass-based fibers cannot fully exploit the high nonlinearity of carbon disulfide, whereas a silica microstructured fiber with a selectively filled core allows excellent dispersion control and a nonlinear coefficient in excess of 6500 W-1middotkm-1 at telecoms wavelengths.

Multichannel Wavelength Conversion of 40-Gb/s Nonreturn-to-Zero DPSK Signals in a Lead–Silicate Fiber

We experimentally demonstrate a compact four-wave-mixing-based multiwavelength converter based on a 2.2-m-long W-type dispersion flattened lead-silicate fiber. Simultaneous wavelength conversion of three 40-Gb/s differential phase-shift-keyed signals with a power penalty below 2 dB is achieved. Due to the high stimulated Brillouin scattering (SBS) threshold of the fiber, no SBS suppression schemes are required for the continuous-wave pump.

Generation of ultra-high repetition rate pulses in a highly nonlinear dispersion-tailored compound glass fibre

The generation of ultrastable optical pulses beyond 160GHz is demonstrated based on two injection-locked CW lasers through nonlinear temporal compression in a high SBS-threshold highly nonlinear dispersion tailored compound glass W-type fibre.

Recent advances in highly nonlinear fibres

We review recent progress in the areas of silica and compound glass based highly nonlinear fibres, highlighting and contrasting the current start-of-the-art, merits, drawbacks and future potential of both approaches.

A single-mode, high index-contrast, lead silicate glass fibre with high nonlinearity, broadband near-zero dispersion at telecommunication wavelengths

We report on the design, fabrication and characterization of a single-mode W-type lead-silicate glass fibre with flattened and near-zero dispersion profile at telecom wavelengths and high nonlinearity of 820W⁻¹ km⁻¹ at 1.55µm.

Applications of highly nonlinear dispersion tailored lead silicate fibres for high speed optical communications

Recent advances in optical fibre technology, most notably in the area of micro structured optical fibres (MOFs), offer a host of new opportunities within future high speed communication systems. Herein we review how our recent progress on the implementation of lead silicate fibre designs, allowing both flexible dispersion control and a high effective nonlinearity, can be integrated into various all-optical signal processing devices for high speed optical communication systems. Highly nonlinear lead silicate fibres have already proven to be well suited for achieving efficient four-wave mixing (FWM) due to their high effective nonlinear coefficient, low dispersion profile and short length.