Centre of Expertise in Photonics (CoEP)
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Founded in early 2005, the Centre of Expertise in Photonics (CoEP) is a research initiative within the School of Chemistry & Physics at the University of Adelaide focusing on the design, fabrication and application of soft glass optical fibres.
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Item Metadata only The mathematical modelling of capillary drawing for holey fibre manufacture(Kluwer Academic Publ, 2002) Fitt, A.; Furusawa, K.; Monro, T.; Please, C.; Richardson, D.Microstructured optical fibres (i.e. fibres that contain holes) have assumed a high profile in recent years, and given rise to many novel optical devices. The problem of manufacturing such fibres by heating and then drawing a preform is considered for the particularly simple case of annular capillaries. A fluid-mechanics model is constructed using asymptotic analysis based on the small aspect ratio of the capillary. The leading-order equations are then examined in a number of asymptotic limits, many of which give valuable practical information about the control parameters that influence the drawing process. Finally, some comparisons with experiment are performed. For a limited set of experiments where the internal hole is pressurised, the theoretical predictions give qualitatively accurate results. For a much more detailed set of experiments carried out with a high-grade silica glass where no hole pressurisation is used, the relevant asymptotic solution to the governing equations is shown to give predictions that agree remarkably well with experiment.Item Metadata only A high efficiency low threshold erbium-doped holey optical fiber laser(IEEE, 2003) Furusawa, K.; Sahu, J.; Monro, T.; Richardson, D.; Conference on Lasers and Electro-Optics (CLEO/QELS) (2003 : Baltimore, USA)We report the first continuous wave operation of an erbium doped holey fiber laser with a slope efficiency as high as 57.3%, and with an absorbed pump power threshold as low as 0.55mW.Item Metadata only 24 channels x 10 GHz multiwavelength pulse source based on supercontinuum generation in highly nonlinear holey fiber(IEEE, 2003) Yusoff, Z.; Teh, P.; Petropoulos, P.; Furusawa, K.; Belardi, W.; Monro, T.; Richardson, D.; Optical Fiber Communications Conference (2003 : Atlanta, USA)We demonstrate a multiwavelength pulse source which utilizes supercontinuum generated in a normally dispersive holey fiber and spectral slicing in an arrayed waveguide grating. All channels exhibit almost constant pulse width and excellent noise properties, as verified by bit-error-rate measurements.Item Metadata only Holey fibre based nonlinear optical devices for telecommunications(IEEE, 2003) Lee, J.; Belardi, W.; Monro, T.; Richardson, D.; Conference on Lasers and Electro-Optics (24th : 2003 : Baltimore, Md.)The wavelength-scale features in holey fibers lead to novel properties including endlessly single-mode guidance, high optical nonlinearity. The state-of-the-art HF technology for nonlinear optical signal processing devices is reviewed from a viewpoint of possible applications for telecommunications.Item Metadata only Correlation between the Brillouin and the structural parameters in holey optical fibers(IEEE, 2004) Furusawa, K.; Yusoff, Z.; Thomsen, B.; Monro, T.; Richardson, D.; CLEO/ IQEC 2004 (2004 : San Francisco, USA)We measure the correlation between the Brillouin characteristics and structural parameters of a holey fiber (HF). Our observations point to a means to perform high resolution non-destructive structural characterization along lengths of HF.Item Metadata only Towards zero dispersion highly nonlinear lead silicate glass holey fibres at 1550nm by structured-element-stacking(Institute of Electrical Engineers, 2005) Leong, J.; Asimakis, S.; Poletti, F.; Petropoulos, P.; Feng, X.; Moore, R.; Frampton, K.; Monro, T.; Ebendorff-Heidepriem, H.; Loh, W.; Richardson, D.; European Conference on Optical Communication (31st : 2005 : Glasgow, Scotland)We report the fabrication of lead-silicate holey fibres with a high nonlinearity up to 414 W/sup -1/km/sup -1/ and low dispersion at 1550 nm using a new fabrication technique based on the stacking of extruded structured elements.Item Metadata only PMD properties of spun silica holey fibers(IEEE, 2005) Fuochi, M.; Hayes, J.; Petrovich, M.; Baggett, J.; Monro, T.; Richardson, D.; Conference on Optical Fiber Communication (2005 : Anaheim, California)We report the fabrication of a spun holey optical fiber. Measurements of differential group delay (DGD) confirm that significant reductions in polarization mode dispersion (PMD) can be readily achieved using this approach. © 2005 Optical Society of America.Item Metadata only Beyond silica: New opportunities with soft glass microstructured optical fibres(2005) Monro, T.; TTCP Colloquium on Active and Passive Applications of Optical Fibres (2005 : Edinburgh, UK)Item Open Access Non-silica highly nonlinear holey fibers for telecommunications applications(University of Southampton. Optoelectronics Research Centre, 2005) Asimakis, S.; Petropoulos, P.; Ebendorff-Heidepriem, H.; Leong, J.; Finazzi, V.; Koizumi, F.; Frampton, K.; Moore, R.; Monro, T.; Richardson, D.; Optical Core Network Technologies (2005 : Aveiro, Portugal)We report on recent development in the fabrication and characterization of small-core lead-silicate and bismuth-oxide glass holey fibers. These fibers exhibit an effective nonlinearity three orders of magnitude higher than standard silica fibers, offering the prospect of compact, nonlinear devices operating at low powers.Item Open Access Inverse design and fabrication tolerances of ultra-flattened dispersion holey fibers(Optical Soc Amer, 2005) Poletti, F.; Finazzi, V.; Monro, T.; Broderick, N.; Tse, V.; Richardson, D.We employ a Genetic Algorithm for the dispersion optimization of a range of holey fibers (HF) with a small number of air holes but good confinement loss. We demonstrate that a dispersion of 0 +/- 0.1 ps/nm/km in the wavelength range between 1.5 and 1.6 microm is achievable for HFs with a range of different transversal structures, and discuss some of the trade-offs in terms of dispersion slope, nonlinearity and confinement loss. We then analyze the sensitivity of the total dispersion to small variations from the optimal value of specific structural parameters, and estimate the fabrication accuracy required for the reliable fabrication of such fibers.Item Metadata only Remote OPO Pumping with Photonic Fibres(on line, 2005) O'Driscoll, E.; Watson, M.; Delmonte, T.; Petrovich, M.; Finazzi, V.; Baggett, J.; Monro, T.; Richardson, D.; Electro Magnetic Remote Sensing Defence Technology Centre Technical Conference (2nd : 2005 : Edinburgh, UK)In this paper we seek to assess the advantages offered by index guiding holey fibres and air-core photonic band-gap fibres for high power beam delivery applications with robust single-mode guidance. We explore the practical performance factors associated with each fibre type and consider how these may affect implementation and operation in real aerospace and defence systems. As an example of such a system, we report the use of a photonic crystal fibre as a pump delivery fibre in an optical parametric oscillator (OPO).Item Metadata only Soft glass microstructured fibres: fundamentals and new opportunities for nonlinear fibre devices(2005) Monro, T.; Ebendorff-Heidepriem, H.; Australian Conference on Optical Fibre Technology (30th : 2005 : Sydney, Australia)Item Metadata only Microstructured fibres for nonlinear device applications: progress in design and fabrication(2005) Monro, T.; Poletti, F.; Leong, J.; Ebendorff-Heidepriem, H.; Richardson, D.; International Workshop on Optical Waveguide Theory and Numerical Modelling (14th : 2005 : Sydney, Australia)One particularly promising application area for microstructured optical fibre (MOF) technology is the development of fibre devices based on nonlinear optical effects. Such fibres ,can be used for applications including optical data regeneration, wavelength conversion, optical demultiplexing, and Raman amplification. The usual measure of fibre nonlinearity is the effective nonlinearity γ. Even though silica is not a particularly nonlinear material (n are possible in pure silica microstructured fibres.Item Metadata only A lead silicate holey fibre with γ=1860 W⁻¹km⁻¹ at 1550 nm(Optical Society of Americal, 2005) Leong, J.; Petropoulos, P.; Asimakis, S.; Ebendorff-Heidepriem, H.; Moore, R.; Frampton, K.; Finazzi, V.; Feng, X.; Price, J.; Monro, T.; Richardson, D.; OFC/NFOEC (2005 : Anaheim, California, USA); Karl Koch,Item Metadata only Improving bending losses in holey fibers(Optical Society of America, 2005) Baggett, J.; Monro, T.; Hayes, J.; Finazzi, V.; Richardson, D.; Conference on Optical Fiber Communication (2005 : Anaheim, California)Preliminary work has shown that the bending losses of large-mode-area holey fibers can be improved by modifying the hole configuration (Mortensen et al. (2003)). For the first time, we accurately quantify the advantages of this technique.Item Metadata only Extreme nonlinearity and new dispersion properties of soft glass microstructured optical fibers(2005) Ebendorff-Heidepriem, H.; Monro, T.; Petropoulos, P.; Finazzi, V.; Asimakis, S.; Leong, J.; Frampton, K.; Moore, R.; Richardson, D.; The American Ceramic Society. Meeting & Exposition (107th : 2005 : Baltimore, MA.)Item Metadata only Photonic bandgap fibres for infrared applications(2005) Petrovich, M.; Finazzi, V.; Monro, T.; Richardson, D.; O'Driscoll, E.; Watson, M.; Delmonte, T.; Electro Magnetic Remote Sensing Defence Technology Centre Technical Conference (2nd : 2005 : Edinburgh, UK)Photonic bandgap fibres are among the most innovative developments of optical fibre technology in recent years. In these fibres light can be guided in a hollow core as a consequence of a bandgap effect, allowing for very weak interaction of the guided mode with the fibre structure. This opens the possibility for lower losses and nonlinear effects, and higher damage thresholds, than in conventional fibres. This paper presents the design and fabrication of photonic bandgap fibres for high power beam delivery applications at wavelengths of interest for electro-magnetic remote sensing.Item Metadata only New classes of microstructured fibers(2005) Monro, T.; Ebendorff-Heidepriem, H.; The American Ceramic Society. Meeting & Exposition (107th : 2005 : Baltimore, MA.)Item Open Access Broadband supercontinuum generation in an extremely nonlinear extruded lead silicate holey fiber using weak fs pulses(IEEE, 2005) Leong, J.; Petropoulos, P.; Price, J.; Ebendorff-Heidepriem, H.; Asimakis, S.; Moore, R.; Frampton, K.; Finazzi, V.; Feng, X.; Monro, T.; Richardson, D.; Pacific Rim Conference on Lasers and Electro-Optics (2005 : Tokyo, Japan)Broadband supercontinuum generation at 1.06 μm spanning > 1000 nm and extending to the visible is observed in a dispersion optimized holey fiber with a record-high nonlinearity (1860 W-1km-1 at 1.55 μm), for launched pulse energies < 100 pJ.Item Metadata only Heavy metal oxide glass holey fibers with high nonlinearity(Optical Society of America, 2005) Ebendorff-Heidepriem, H.; Petropoulos, P.; Finazzi, V.; Asimakis, S.; Leong, J.; Koizumi, F.; Frampton, K.; Moore, R.; Richardson, D.; Monro, T.; Conference on Optical Fiber Communication (2005 : Anaheim, California)We report on the development of small-core high-NA lead silicate and bismuth glass holey fibers. We measured high nonlinearity (1100 W-1 km-1 in bismuth holey fiber) and predicted near-zero or anomalous dispersion at 1550 nm. © 2004 Optical Society of America.