Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 38 for “"wavelength-division multiplexing (WDM)"”.
-
Scheduling algorithms for throughput maximization in data networks
… network setting, the key enabling technology is wavelength division multiplexing (WDM), which allows each optical fiber link to simultaneously carry a large number of independent data streams at high rate. To take advantage of this high data processing potential, engineers and physicists have …
-
DMACS: a media access protocol for single-hop wavelength division multiplexed lightwave networks
… metropolitan area all-optical networks employing wavelength division multiplexing (WDM). Through WDM, multiple channels are created on a single fiber, and an aggregate network bandwidth far greater than the peak electronic processing speed can be realized. The new protocol, Dynamic Media Access …
-
Optimizing resource allocation in next-generation optical access networks
… three next-generation access networks: Time Division Multiplexing (TDM) PONs, Wavelength Division Multiplexing (WDM) PONs, and WDM Radio-Over-Fiber (RoF) Picocellular networks. To address resource allocation problems in these three networks, this thesis first investigates respective …
-
Novel Segment Deformable Mirror Based Adaptive Attenuator Used In Wavelength Division Multiplexed Optical Communications Network
In wavelength division multiplexed (WDM) optical communication networks, signals are amplified periodically by optical amplifiers. Since the gain profiles of optical amplifiers are not flat, equalizers are usually used to maintain signal powers at different wavelengths in equal to avoid crosstalk …
-
Integrated erbium lasers in silicon photonics
… linewidth performance. Using a novel wavelength-insensitive design, a CMOS compatible waveguide structure is proposed to achieve high confinement factor and intensity overlap for both the pump (980 nm) and signal (1550 nm) wavelengths. Laser operation in the C- and L- bands of the …
-
Architectural study of high-speed networks with optical bypassing
We study the routing and wavelength assignment (RWA) problem in wavelength division multiplexing (WDM) networks with no wavelength conversion. In a high-speed core network, the traffic can be separated into two components. The first is the aggregated traffic from a large number of small-rate users. …
-
An analysis of cross grain saturation effects in systems of cascaded erbium-doped fiber amplifiers
… networking and a discussion of the technique of wavelength division multiplexing (WDM). The chapter closes with a statement of the problem to be addressed in this thesis. Chapter 2 provides background in relating a literature search for characterization of cross gain saturation and techniques …
-
Micro-opto-mechanical switching and tuning for integrated optical systems
… for integrated optical circuits would provide wavelength-selective switching. Wavelength- selective behavior is an important characteristic for devices intended for networking applications as wavelength division multiplexing (WDM) of optical signals has become the accepted standard. A major …
-
Resonant cavity Fibre Bragg grating sensor interrogation
… a novel high-performance approach to time-division-multiplexing (TDM) fibre Bragg grating (FBG) optical sensors, known as the resonant cavity architecture. A background theory of FBG optical sensing includes several techniques for multiplexing sensors. The limitations of current …
-
The impact of WH/TS codes in implementing incoherent OCDMA system
… hardware requirements is needed. Optical code division multiple access (OCDMA) is an advanced multiplexing scheme which provides a more efficient and fairer division of available bandwidth among users in comparison to other techniques such as wavelength division multiplexing (WDM) and optical …
-
Advanced silicon photonic microcavities for routing, detection and lasing applications
… These structures provide the ability to filter wavelength, support high-Q modes and enhance intensity within the cavities while maintaining a small device footprint. Such characteristics make these structures good candidates to optimize performance and shrink the size of devices for both linear …
-
Studies of advanced integrated nano-photonic devices in silicon
… contrast and low propagation loss at telecom wavelengths. The current thesis presents recent advances in demonstrating discrete components built in silicon-on-insulator (SOI) platforms, around 1550 nm, that can be used as building blocks for future EPIC systems. The first part of this thesis …
-
Wavelength agnostic WDM strategies for avionic telecommunications
… aircraft. Particular attention has been paid to Wavelength Division Multiplexing (WDM) in Passive Optical Networks (PONs) and how the network is affected by the harsh environment found on aircraft. The harsh environment presents a particular challenge with respect to the operational temperature …
-
GaN-based distributed feedback laser diodes and their applications
… free-space communication using GaN DFBs in a wavelength division multiplexing (WDM) system, which can greatly increase data transmission rates in a communication system, as well as an underwater system with assets communicating using GaN-based DFBs. <br/><br/>This thesis presents the highest …
-
Polarization manipulation in silicon photonics
… channels to fully utilize the power of wavelength division multiplexing (WDM). Furthermore, a multi-channel WDM broadcasting system is proposed using the optical bus design. We have demonstrated a two-channel broadcasting system, which can be further increased to more than 16 channels.
-
Link failure protection and restoration in WDM optical networks
<p>In a wavelength-division-multiplexing (WDM) optical network, the failure of fiber links may cause the failure of multiple optical channels, thereby leading to large data loss. Therefore the survivable WDM optical networks where the affected traffic under link failure can be restored, have been a …
-
High Data Rate Coherent Optical OFDM System for Long-Haul Transmission
… high data rates. Optical Orthogonal Frequency Division Multiplexing is considered as a promising technology to satisfy the increased demand for bandwidth in broadband services. Optical OFDM received a great attention after proposing it as a modulation technique for the long-haul transmission in …
-
Ultra-Wideband Fibre-Optic Systems in the Nonlinear Regime
… nonlinearity. Expanding optical bandwidth in wavelength-division multiplexing (WDM) systems is an achievable solution to solve the incoming growth in the demand for high data rates. Second, in ultra-wideband (UWB) systems, beyond the conventional 5 THz bandwidth, the inter-channel stimulated …
-
Optical fibre communication over a noisy partially coherent channel
… technologies of coherent detection and wavelength-division multiplexing (WDM), widely deployed in long-haul links, are gaining ground in access networks, which is particularly challenging due to the shared-cost requirements, leading to denser channel spacings and the use of cheaper …
-
Resonant Wavelength Tuning and CMOS Circuits for Silicon Photonic Transmitters with Microring Modulators
… (MZMs). MRMs are particularly advantageous for wavelength-division multiplexing (WDM) transceivers, where their wavelength-selective nature enables dense spectral utilization. However, their widespread adoption is hindered by electro-optic (EO) nonlinearity and sensitivity to process and thermal …
Page 1 of 2