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Applications of stimulated Brillouin scattering in high-resolution spectral analysis, generation of low-noise millimeter and THz-carriers, generation of broadband high-quality sinc-shaped pulses and realization of microwave photonics band-pass filters, are proposed and demonstrated experimentally.
A reverse design of light emitting diode lamp arrangement is proposed to offer sufficient brightness and uniform SNR. A suboptimal arrangement is also discussed to save on cabling cost.
This paper proposes a cost-effective, scalable network architecture, which combines millimeter-wave (MMW) and free space optics (FSO) technologies that can be employed as a complementary solution for pre-deployed optical fiber based 5G cellular backhaul networks.
We report performance improvements by nonlinear mitigation techniques in homogeneous and heterogeneous network environments. Our results show that super channels with small sub carrier count benefit most from nonlinear mitigation.
We demonstrate phase regeneration of 24-Gb/s QPSK signals using hybrid optical phase squeezer. Heavily phase-noise loaded signals experienced a more than 3-fold phase-noise decrease. A quality factor enhancement by more than 3dB is also demonstrated.
We give a brief overview on the status of fiber-based noise-like pulse (NLP) research. In addition, we present studies on the coherence characteristics of NLPs in nonlinear polarization rotation-based erbium-doped fiber ring cavity configurations.
Optical phase conjugation has shown interesting prospects for nonlinear compensation in transmission systems. Here we review the concept and recent progress of a system designed to maximize its benefits, leading to linearized WDM transmission systems.
Microdisk and microring lasers are investigated for realizing single mode directional emission microlasers. Transverse mode controls are demonstrated by varying the microring width and the introduction of a scar at the perimeter of microdisk lasers.
A 20Gb/s Transimpedance Amplifier (TIA) is implemented in 65nm CMOS process using input-serial-peaking technique. Measurement results show that the hybrid integrated TIA with PD achieves up to 20Gb/s clean optical-diagram, with 4.3ps RMS-jitter, consuming 7.2mW.
Distributed temperature and strain sensing (DTSS) using optical fibre has many applications in monitoring the security and stability of infrastructure. Early detection is important to avoid catastrophic faults from occurring. This requires enhanced sensitivity of sensors, much beyond what is available today. Our work has centred on the enhancement of temperature and strain sensing using stimulated...
Recent progress on hybrid integration of III–V on Silicon devices using wafer bonding is presented focusing on hybrid tunable lasers and their applications for the next generation of access, metropolitan and long haul optical networks.
Ultra-narrow linewidth laser, the influence of interference noise and fast pattern recognition algorithm are obstacles in developing coherent detection based Φ-OTDR. This paper presents our recent works on solving these problems and gives some practical engineering applications.
Optical pulse compression reflectometry (OPCR) has been proposed to utilize the frequency modulation pulse-compression technology so as to overcome the tradeoff between the spatial resolution and measurement range. In this paper we theoretically analyze and simulate the influence of phase noise on OPCR. The phase noise determining the coherent length of the light source is closely linked to the measurement...
OSNR improvement related to fiber loss and Aeff is theoretically and experimentally investigated in hybrid Raman/EDFA amplified systems. Pure-silica-core fiber with Aeff of 110µm2 is appropriate for terrestrial long-haul links, exhibiting optimal OSNR performance.
We propose a kind of heterogeneous trench-assisted graded-index few-mode multi-core fiber (Hetero-TA-GI-FM-MCF). For each core in the fiber, absolute value of differential mode delay (| DMD |) can be smaller than 100 ps/km over C+L bands.
In this study we tuning the polymer properties in THz region by high performance inorganic nano/micro particles. Based on the organic-inorganic composites, a femto-second (fs) laser/THz radiation separating filter and an anti-reflective coating are proposed.
Highly transparent as well as very high refractive index titania-COP composites were prepared and their properties in terahertz (THz) region were characterized. Based on these composites a broadband (0.2–1.6 THz) antireflective (AR) layer was fabricated successfully by using a hot-embossing method.
Tidal traffic caused by the large-scale population migration between workplace during the day and residence at night are becoming a crucial problem for metro network control and management. We introduce an effective tidal traffic dispatching scheme with a novel TIDAL model based on software-defined architecture. Simulation results show that our proposed scheme can significantly reduce the network...
Polystyrene was used to fabricate gradient index structure for terahertz antireflection via a hot-embossing process. Compared with a single non-structured antireflective layer, the gradient index structure increases transmittance by 20% and has broader enhanced bandwidth.
This article aims at controlling Optical Networks in software method based on OpenFlow Extension. We abstract OTN equipment on Layer Class and combine it with OpenFlow to achieve unified management of data and optical plane.
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