| 1. |
- Wang, Shu Min, 1963, et al.
(author)
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Bismuth incorporation and lattice contraction in GaSbBi and InSbBi
- 2011
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In: 13th International Conference on Transparent Optical Networks, ICTON 2011, Stockholm, 26-30 June 2011. - 2162-7339. - 9781457708800
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Conference paper (peer-reviewed)abstract
- III-V-Bi compounds have received considerable attention recently due to a number of interesting material properties. For example, adding a small amount of Bi atoms in conventional III-Vs leads to a large bandgap reduction that occurs predominately in the valence band, about 88 meV/%Bi in GaAsBi. The Bi incorporation affects only the valence band structures and has little influence on electrons. Compared with dilute nitrides, the electron mobility of dilute GaAsBi is much less affected and photoluminescence intensity increases with the Bi incorporation. Dilute GaAsBi also introduces a large spin-orbit split and it has been suggested to use this property to suppress Auger recombination for 1.55 μm lasers on GaAs [1]. So far most experimental studies have been focused on growth of GaAsBi [2], but very little on GaSbBi and InSbBi. Here we report growth of dilute GaSbBi and InSbBi using molecular beam epitaxy (MBE). We have optimized growth conditions aiming at achieving maximum Bi incorporation. Surprisingly X-ray diffraction (XRD) revealed lattice contraction in GaSbBi and InSbBi although Bi atoms have a large atomic radius.
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| 2. |
- Wróbel, P., et al.
(author)
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Preparation of high energy throughput SNOM probes
- 2011
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In: 13th International Conference on Transparent Optical Networks, ICTON 2011, Stockholm, 26-30 June 2011. - 2162-7339. - 9781457708800
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Conference paper (peer-reviewed)abstract
- In this technical note we present technological steps of fabrication of high energy throughput SNOM probes. The core-metal coating interface of probes is corrugated what enhances photon-to-plasmon coupling. A strong evanescent field allows for reduction of aperture diameter, which together with skin depth of metal used for coating decide upon resolution. Probes are made of Ge-doped silica glass fibre, which is hydrogenated to increase its photosensitivity. A Bragg grating is recorded in the cores with UV light diffracted into +1 st/1st diffraction orders on a sinusoidal phase mask. Modulation of the refractive index is connected with different etch rates. Etching with the Turner method is made in aqueous solution of HF acid. A corrugated tapered fibre is then coated with aluminium in a special rotating holder. We present results of this novel multi step technology.
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| 3. |
- Anand, Srinivasan, et al.
(author)
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InP-Based Photonic Crystal Waveguide Technology for Filtering and Sensing Applications
- 2011
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In: 2011 13TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON). - NEW YORK : IEEE. - 9781457708800
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Conference paper (peer-reviewed)abstract
- Photonic crystal (PhC) components in InP-based materials are of practical importance not only for their unique properties but also for integration with conventional optoelectronic components on InP substrate. Several PhC devices in the substrate approach such as filters, lasers, and waveguides have been demonstrated [1,2] and this has been possible due to the development of deep etching of PhCs in InP [3].
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| 4. |
- Borsatti, Davide, et al.
(author)
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From IoT to Cloud: Applications and Performance of the MQTT Protocol
- 2020
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In: International Conference on Transparent Optical Networks. - 2162-7339. ; 2020-July, s. 1-4
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Conference paper (peer-reviewed)abstract
- A study of the MQTT publish/subscribe protocol with different QoS levels is presented with the aim to extend the Internet of Things (IoT) concept across access, edge and transport networks and reach cloud computing facilities. A simple testbed is set up with related software components to measure the end-to-end delivery latency between the publisher and the subscribers and the impact of the network delay caused by network configurations with different service deployments. In particular, the latency is shown to rise up to more than 7 times the average network delay when the QoS 2 level is applied, thus indicating that its adoption must be carefully considered.
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| 5. |
- Buraidah, M. H., et al.
(author)
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Solar Module Using Dye-Sensitized Solar Cells
- 2018
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In: International Conference on Transparent Optical Networks. - 2162-7339. ; 2018-July
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Conference paper (peer-reviewed)abstract
- Solar module in this work comprises dye sensitized solar cells (DSSC) in series connection. The DSSC is made from transparent fluorine-doped tin oxide (FTO) glass on which two layers of titanium dioxide (TiO2) have been deposited and then soaked in ruthenium dye to form the photoanode. A phthaloylchitosan based gel polymer electrolyte containing iodide/triiodide redox mediator was sandwiched between the photoanode and platinum counter electrode. The two layers of TiO2 have different particle sizes. The first layer ( 15 nm particle size) acts as blocking layer whereas the second layer (particle size 21 nm) is mesoporous. The current-voltage characteristics and impedance measurements have been performed on the solar panel. Results show that the solar module comprising five DSSCs connected in series is capable to produce current around 0.7 mA•cm-2, voltage of 3.3 V and power density of 1.1 mW•cm-2 under solar simulator with light intensity of 18 mW•cm-2. The feasibility of the solar panel has been tested in practical applications e.g. operating small decorative items that require small power to function.
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| 6. |
- Cardoso, Evelin, et al.
(author)
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A Heuristic Approach for the Design of UAV-Based Disaster Relief in Optical Metro Networks
- 2020
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In: International Conference on Transparent Optical Networks. - 2162-7339. - 9781728184234 ; 2020-July, s. 1-5
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Conference paper (peer-reviewed)abstract
- We propose a novel algorithm to dimension the backup elements in an optical metro network, by considering the adoption of Unmanned Aerial Vehicles (UAVs) and wireless interfaces to realize backup wireless links. Our key idea is to efficiently find the set of node pairs that have to be connected by means of multi-hop UAV-based wireless links, which are selected based on the simulation of multiple disaster events. Results, obtained over a set of meaningful scenarios, demonstrate that our solution can greatly reduce the total installation costs compared to a naive approach, which is instead solely tailored to the restoration of the disrupted links in a given disaster scenario.
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| 7. |
- Chen, Jiajia, et al.
(author)
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Passive wide area network solutions : Filterless and semi-filterless optical networks
- 2011
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In: 13th International Conference on Transparent Optical Networks (ICTON). - 9781457708800
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Conference paper (peer-reviewed)abstract
- Advances in optical coherent transmission and electrical compensation technologies (such as coherent receiver and forward error correction FEC) have stimulated ideas for novel optical network architectures. Recently proposed passive wide area network solution, referred to as filterless optical network [1 #x2013;2] eliminates or minimizes the usage of active photonic reconfigurable network elements. In this approach, only the passive splitters and combiners for interconnecting the fiber links are utilized, which makes this network architecture more cost- and energy-effective as well as more reliable compared with networks based on active optical switching. However, the filterless optical network architecture implies some constraints on fiber interconnection design, maximum fiber-tree length and wavelength reuse due to its broadcast nature. Consequently, filterless solution always requires more resources (i.e. number of wavelengths) compared with the active switched optical networks which are allowed to utilize reconfigurable and coloured components. In order to improve the wavelength utilization while maintaining flexibility of resource allocation, this work extends the idea of filterless optical network by introducing some passive coloured components (e.g., fiber Bragg grating FBG, red/blue filters, etc) to drop local signals at some determined nodes. This approach is referred to as semi-filterless optical network. Furthermore, the semi-filterless solution maintains the passive feature, enabling high reliability and efficiency of cost and energy. Meanwhile, its non-broadcast property at some determined nodes has potential to decrease the transmission impairments and hence relax the constraints on fiber interconnection design and the maximal transparent length, which are strict in the filterless optical network. Our preliminary results confirm the advantages of semi-filterless solution.
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| 8. |
- Dmitriev, Alexander, 1975
(author)
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Highly directional nanoantennas and plasmon-organic photovoltaics from bottom-up
- 2013
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In: International Conference on Transparent Optical Networks. - 2162-7339. - 9781479906826
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Conference paper (peer-reviewed)abstract
- I discuss the advances in bottom-up nanoplasmonics that rely on nanofabrication with hole-mask colloidal lithography (HCL). Two examples are highly directional nanoantennas in the visible, and enhanced plasmon-organic photovoltaics.
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| 9. |
- Dmitriev, Alexander, 1975
(author)
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Magnetoplasmonics for Active Control of Light
- 2015
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In: 2015 17th International Conference on Transparent Optical Networks. - 2162-7339. - 9781467378802 ; , s. 1-
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Conference paper (peer-reviewed)abstract
- Here I discuss the possibilities given by combining magnetism and plasmonics to gain control over polarization and phase of light with magnetoplasmonic nanoantennas. The combination of high near-field confinement by nanoplasmonic antennas and enhanced magneto-optical effects in these antennas allows creating adaptive metasurfaces in the visible spectral range.
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| 10. |
- Etezadi, Ehsan, 1993, et al.
(author)
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Proactive Spectrum Defragmentation Leveraging Spectrum Occupancy State Information
- 2023
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In: International Conference on Transparent Optical Networks. - 2162-7339. ; 2023-July
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Conference paper (peer-reviewed)abstract
- One of the main obstacles to efficient resource usage under dynamic traffic in elastic optical networks (EONs) is spectrum fragmentation (SF), leading to blocking of incoming service requests. Proactive spectrum defragmentation (SD) approaches periodically reallocate services to ensure better alignment of available spectrum slots across different links and alleviate blocking. The services for reallocation are commonly selected based on their properties, e.g., age, without detailed consideration of prior or posterior spectrum occupancy states. In this paper, we propose a heuristic algorithm for proactive SD that considers different spectrum fragmentation metrics to select services for reallocation. We analyze the relationship between these metrics and the resulting service blocking probability. Simulation results show that the proposed heuristic outperforms the benchmarking proactive SD algorithms from the literature in reducing blocking probability.
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