Summary It is shown how planar Y-junction based combiners and splitters can form the basis for the individual excitation and detection of the fundamental and low-order modes in a few-mode optical fibre network.
An ultra-flat optical frequency comb generator based on frequency chirp linearization is proposed and demonstrated. 3.27-dB and 7.38-dB flatness improvement are obtained in experiment and simulation, respectively.
In this invited paper, we describe an adaptive nonbinary LDPC coded modulation scheme suitable for high-speed optical transport networks, which is based on irregular quasi-cyclic-LDPC codes derived from pairwise balanced designs, providing excellent coding gains.
An out-of-band signal components cancellation scheme through balanced detection is proposed for SBS-based OSAs. Accompanied with the nonlinear distortion compensation, the dynamic range of the measured spectra can be improved from ~10 dB to >50 dB.
We propose a system for the error-free changing of optical-access-line routes using delay lines with ringbuffer memories. The approach allows adjustment within 20km at a speed of about 487m/s with no impact on transmission quality.
A direct measurement of near-field phase and intensity distribution of lensed fiber employing single-mode fiber (SMF) interferometer is proposed and demonstrated providing valuable design of micro-optic components for efficient coupling between light source and SMFs.
We demonstrate time-domain optical soliton tweezers: the trapping and real-time manipulation of a sequence of picosecond optical solitons. By adjusting the phase profile of the driving beam, we induce controlled time-domain motion of temporal cavity solitons.
We demonstrate the first burst-mode digital coherent transmission necessary for OFDM-PON upstream. The results explicitly show that a burst-mode OFDM transmission can be achieved by using the proposed frame format and a burst-mode coherent receiver.
Temperature and strain sensitivities of fiber Bragg grating inscribed in silica-germanate fiber are experimentally investigated. Thanks to the different sensitivities of individual resonance peaks, the configuration has the potential to measure these two parameters simultaneously.
For the first time, an energy-efficient dynamic bandwidth allocation scheme for long reach PONs is proposed. Results show that the proposed scheme significantly saves ONU energy whilst incurring acceptable frame queuing delays.
We discuss the design and characterization of three-dimensional laser-inscribed multiport devices. The 3D geometry of the devices was exploited to achieve precise phase control through the thermo-optic effect. The potential for non-classical metrology is analyzed.
By combining new algorithms, innovative optical designs and swept sources based on quantum dots, we use dispersion and polarization in versatile optical coherence tomography (OCT) systems to characterise biological tissues.
This paper compares potential architectures to achieve inter-connection in multi-vendor multi-domain heterogeneous optical networks. An experimental multi-vendor network test-bed based on a novel PIONEER architecture is also presented with some preliminary results.
Femtosecond laser pulses are used to understand fading of art chromophores across more than 20 orders of magnitude in time, provide sophisticated approaches for material processing, and as a relatively straightforward tool for device development.
Plasmonic dye sensitized solar cells with three sorts of nanoparticles are investigated. By utilizing nanoparticles of different geometries and metals, optical and electrical improvement is demonstrated whilst the efficiency is significantly boosted over 30%.
Using carrier phase shifted-double sideband modulation, a widely tunable microwave photonic filter is implemented. The experimental results show that the method can eliminate the carrier suppression effect and improve the dynamic range.
We demonstrate a QAM-FOFDM system by transmitting the real and imaginary parts separately in different subbands. Each part is modulated by interleaved DFT, which doubles the spectral efficiency than ordinary OFDM
A 25-GHz 1.7-ps optical Nyquist pulse generator is demonstrated numerically using a time lens with subsequent optical filtering. 7.1-ps Nyquist pulses on 4 wavelengths are also obtained simultaneously.
