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

Abstract

Abstract-We experimentally demonstrate a four-wave mixingbased wavelength conversion scheme at 1.55µm using a 1.1m length of highly nonlinear, dispersion tailored W-type leadsilicate optical fibre.

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

“…The outer cladding was made of a different glass with a higher refractive index, Schott SF6, (n=1.76 @ 1550nm). The nonlinear coefficient, dispersion and loss at 1550nm were 820W -1 km -1 , -3ps/nm/km and 2.1±0.2 dB/m respectively [4]. The dispersion profile of the fibre is shown in the inset to Fig.…”

“…However, compound glasses generally suffer from high normal material dispersion around 1.55µm and counter-balancing this with waveguide dispersion is a non-trivial fabrication task. We have recently shown a fibre design with a W-type refractive index profile as a possible solution to this problem [4] and fabricated a fibre with a highly nonlinear coefficient and low and flat dispersion profile at telecom wavelengths.…”

“…However, compound glasses generally suffer from high normal material dispersion around 1.55µm and counter-balancing this with waveguide dispersion is a non-trivial fabrication task. We have recently shown a fibre design with a W-type refractive index profile as a possible solution to this problem [4] and fabricated a fibre with a highly nonlinear coefficient and low and flat dispersion profile at telecom wavelengths.Here we experimentally demonstrate the generation of high repetition rate (160GHz and 200GHz) pulses through stable injection-locking of two semiconductor lasers in a 3m-long sample of the fabricated W-type fibre and investigated the role of the tailored dispersion profile for the generation of ultra-short high repetition rate pulses. …”

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

“…The complex interdependence between temperature, surface tension and internal pressure within the holes, however, causes small-scale longitudinal cross sectional variations, which are very difficult to control in practice. To solve this issue we have proposed in [3] a new all-solid fibre concept based on the use of three commercial lead silicate glasses (Schott SF57, LLF1, SF6) arranged in a W-type index profile. The fabricated fibre presents a flattened and near-zero dispersion profile and a high nonlinearity of 820W -1 km -1 at the telecom wavelengths.…”

“…The fabricated fibre presents a flattened and near-zero dispersion profile and a high nonlinearity of 820W -1 km -1 at the telecom wavelengths. Accurate polishing of the glass preform before the fibre drawing has allowed us to reduce the propagation losses from an initial value of ~5dB/m [3] down to ~2dB/m [4] in the 1.55µm region. In this talk we will review some examples of successful applications of the fabricated single-mode, highly nonlinear dispersion tailored lead silicate glass fibre for high speed optical communication.…”