Thomsen, B.C., Renaud, C.C., Savory, S.J., Romans, E.J., Mitrofanov, O., Rio, M., ...
The aim of this work is to introduce scenarios into the first and second year of our undergraduate electronic and electrical engineering curriculum to improve the educational and learning experience...
Optically equalized 10 Gb/s NRZ digital burstmode receiver for dynamic optical networks (2007)
Thomsen, B.C., Puttnam, B.J., Bayvel , P.
A 10Gb/s NRZ burst-mode optical receiver suitable for receiving asynchronous bursts with power variations of up to 7 dB is presented. The digital burst mode receiver is based on a standard AC-coupled...
Feasibility study of SOA-based noise suppression for spectral amplitude coded OCDMA (2007)
McCoy, A.D., Ibsen, M., Horak, P., Thomsen, B.C., Richardson, D.J.
We investigate the benefits of employing a saturated SOA to reduce optical noise in an incoherent light OCDMA system. In the context of spectrum-slicing, SOA-based noise suppression has shown...
Dupriez, P., Piper, A., Malinowski, A., Sahu, J.K., Ibsen, M., Thomsen, B.C., ...
We demonstrate a pulsed ytterbium-doped fiber master-oscillator power amplifier source at 1060 nm producing over 300 W of average power in 20-ps pulses at 1-GHz repetition rate. The pulses generated...
McCoy, A.D., Horak, P., Thomsen, B.C., Ibsen, M., Richardson, D.J.
In this paper, we present an experimental and numerical study of semiconductor optical amplifier (SOA)-based noise suppression and its relevance to high-channel-density spectrum-sliced...
Piper, A., Malinowski, A., Thomsen, B.C., Richardson, D.J., Hickey, L.M.B., Zervas, M.N.
20ps pulses at 1 GHz repetition rate were obtained from a gain-switched 1.06 μm semiconductor laser utilizing pulse compression with normally dispersive fiber. The pulses were amplified in fiber to...
Improving signal quality in a spectrum-sliced WDM system using SOA-based noise reduction (2005)
McCoy, A.D., Horak, P., Thomsen, B.C., Ibsen, M., Mokhtar, M.R., Richardson, D.J.
We present an experimental and numerical study into the filtering effects in a spectrum-sliced incoherent light system incorporating a semiconductor optical amplifier (SOA) for noise reduction....
Frequency-resolved optical gating in a quasi-phase-matched LiNbO/sub 3/ waveguide (2005)
Prawiharjo, J., Gallo, K., Thomsen, B.C., Roelens, M.A.F., Almeida, P.J., Broderick, N.G.R.
We demonstrate the complete characterization of short pulses around 1.55 /spl mu/m by cross-correlation frequency-resolved optical gating based on sum-frequency generation in an integrated LiNbO/sub...
Direct sequence OCDMA systems based on fibre grating technology (2005)
Richardson, D.J., Teh, P.C., Mokhtar, M.R., Roelens, M.A.F., Thomsen, B.C., Tian, C., ...
Fibre Bragg grating technology enables all-optical encoding and decoding of short pulses at ultrafast chip rates. Such code sequences can be used to implement both all-optical code division multiple...
High average power picosecond pulses from a fiber amplified diode laser at 1060nm (2005)
Dupriez, P., Piper, A., Farrell, C., Malinowski, A., Sahu, J.K., Jeong, Y., ...
Many industrial and scientific applications require high-power, short-pulse laser systems. Semiconductor lasers have long proved to be a very convenient and practical technology to generate short...
Blind-FROG in a quasi-phase-matched LiNbO3 waveguide (2005)
Prawiharjo, J., Gallo, K., Thomsen, B.C., Roelens, M.A.F., Almeida, P.J., Broderick, N.G.R., ...
We demonstrate the measurement of short pulses in the 1.55 μm telecommunications window by spectrally resolved cross correlation in an integrated LiNbO device. Extremely high quality pulse retrieval...
Advances in high power short pulse fiber laser systems and technology (2005)
Price, J.H.V., Malinowski, A., Piper, A., He, F., Belardi, W., Monro, T.M., ...
We review recent advances in Yb fiber lasers and amplifiers for high power short pulse systems. We go on to describe associated recent developments in fiber components for use in such systems....
Thomsen, B.C., Reid, D.A., Watts, R.T., Barry, L.P., Harvey, J.D.
The characteristics of 40-Gbit/s pulses generated by exploiting the nonlinear characteristics of a Mach-Zender Lithium Niobate modulator are presented. A high spectral resolution frequency resolved...
Thomsen, B.C., Reid, D.A., Watts, R.T., Barry, L.P., Harvey, J.D.
The characteristics of 40-Gbit/s pulses generated by exploiting the nonlinear characteristics of a Mach-Zender Lithium Niobate modulator are presented. A high spectral resolution frequency resolved...
All-optical packet compression based on time to wavelength conversion (2004)
Almeida, P.J., Petropoulos, P., Thomsen, B.C., Ibsen, M., Richardson, D.J.
We experimentally demonstrate a novel optical packet compression scheme based on linearly chirping the packets followed by dispersive compression and multiwavelength conversion back onto a single...
Intensity noise suppression in fibre DFB laser using gain saturated SOA (2004)
McCoy, A.D., Fu, L.B., Ibsen, M., Thomsen, B.C., Richardson, D.J.
Experimental results of a simple, all-optical technique to reduce low-frequency intensity noise in an Er-Yb codoped fibre distributed feedback (DFB) laser are reported. This method utilises the gain...
Intensity noise reduction of incoherent light using semiconductor optical amplifiers (2004)
McCoy, A.D., Horak, P.E., Thomsen, B.C., Ibsen, M.I., Richardson, D.J.
We review the use of a semiconductor optical amplifier for intensity noise reduction of incoherent sources and describe our recent experimental and theoretical work in this area. We focus in...
Roelens, M.A.F., Thomsen, B.C., Richardson, D.J.
A fibre Bragg grating is designed to spectrally filter and perfectly compensate the chirped pulses from a gain-switched laser diode. This design is based on the exact characterisation of the...
All-optical TDM add-drop multiplexer based on time to wavelength conversion (2004)
Almeida, P.J., Petropoulos, P., Ibsen, M., Mokhtar, M.R., Thomsen, B.C., Richardson, D.J.
We demonstrate a novel and highly flexible approach to OTDM add-drop multiplexing based on OTDM-WDM conversion with an intermediary passive spectral filtering stage. Error-free operation at 40 Gbit/s...
Roelens, M.A.F., Thomsen, B.C., Richardson, D.J.
The intensity and phase profiles of eight 10 Gbit/s WDM channels on a 200 GHz grid have been simultaneously measured using a spectrally resolved optical gating technique, based on sampling with a...
McCoy, A.D., Fu, L.B., Ibsen, M., Thomsen, B.C., Richardson, D.J.
We report the experimental results of a simple, all optical technique to reduce the relative intensity noise peak of a fibre distributed feedback laser. A noise reduction of 30dB is achieved.
Correlation between the Brillouin and the structural parameters in holey optical fibers (2004)
Furusawa, K., Yusoff, Z., Thomsen, B.C., Monro, T.M., Richardson, D.J.
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...
Retiming of short optical pulses using linear pulse reshaping and all-optical switching (2004)
Parmigiani, F., Petropoulos, P., Ibsen, M., Thomsen, B.C., Richardson, D.J.
An all-optical, all-fiberized technique for the elimination of timing jitter in short pulse transmission systems is experimentally demonstrated. The technique is based on pulse shaping in a...
60W 10GHz 4.5ps pulse source at 1.5 microns (2004)
Thomsen, B.C., Jeong, Y., Codemard, C., Roelens, M.A.F., Dupriez, P., Sahu, J.K., ...
We demonstrate high power amplification of 4.5ps pulses from a compact gain-switched laser diode. Average powers of 60 W are obtained after amplification in a double-clad Er:Yb co-doped fiber...
Filtering effects in a spectrum-sliced WDM system using SOA-based noise reduction (2003)
McCoy, A.D., Thomsen, B.C., Ibsen, M., Richardson, D.J.
We present an experimental investigation into the effects of receiver filtering on the intensity noise in a spectrum-sliced incoherent light system incorporating semiconductor optical amplifier (SOA)...
Optical packet compression in fibres based on time lens and solitonic effects (2003)
Almeida, P.J., Petropoulos, P., Lee, J.H., Thomsen, B.C., Ibsen, M., Richardson, D.J.
We experimentally demonstrate a novel optical packet compression scheme based on temporal imaging of TDM packets through time lensing in fibres, while maintaining the pulse width by virtue of soliton...
Thomsen, B.C., Teh, P.C., Ibsen, M., Richardson, D.J.
An all-optically addressed self-routing optical packet switched network scheme based on the Manhattan Street Network is presented. This scheme simplifies the optical processing that is required in...
Pulse shaping in an optical parametric oscillator with fibre feedback (2003)
Lloyd, P.S., O'Connor, M.V., Watson, M.A., Thomsen, B.C., Shepherd, D.P., Hanna, D.C.
Ultrashort pulses in the infrared have a wide range of applications and synchronously pumped optical parametric oscillators (SPOPOs) have proven to be attractive sources in this context, providing...
Optimised pulse compression of 40 Gbit/s pulses using frequency resolved optical gating (2003)
Thomsen, B.C., Reid, D.A., Watts, R.T., Harvey, J.D.
The use of frequency resolved optical gating measurements to simplify the design and optimization of an 80 Gbit/s pulse source, based on a 40 Gbit/s externally modulated CW laser diode followed by a...
Thomsen, B.C., Teh, P.C., Ibsen, M., Richardson, D.J.
A simple self-routing edge-to-edge optical packet switched network based on all-optical recognition of a 20 Gchip/s cascaded header using fibre Bragg gratings is presented. Self-routing of optical...
Thomsen, B.C., Teh, P.C., Ibsen, M., Lee, J.H., Richardson, D.J.
We present an optical packet switching system based on header recognition using 255 bit, 320 Gbit/s superstructured fiber Bragg gratings. Two hop operation, with header reuse, of a packet add/drop...
Teh, P.C., Thomsen, B.C., Ibsen, M., Richardson, D.J.
We present a multi-wavelength (40 WDM x 10 Gbit/s) optical packet router capable of processing 4 Gigapackets/s based on header recognition using 16-bit, 20-Gbit/s superstructured fibre Bragg...