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 32 for “"wavelength conversion"”.
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Wavelength conversion by four wave mixing in passive InGaAsP/InP waveguides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Temperature-Dependent High-Speed Modulation and Wavelength Conversion Using Quantum-Well Lasers
… determine the high-speed modulation response and wavelength conversion in long-wavelength semiconductor lasers is presented. The steady-state measurement of gain is presented through four different approaches, including the direct (Hakki-Paoli) measurement of polarization-resolved spectra, …
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Non-linear optical properties of semiconductor nano-structures for slow light and wavelength conversion
… the utilization of quantum dots for wavelength conversion via four-wave mixing. Our results show that quantum dots with only a single bound state are more efficient than both quantum wells and quantum dots with a large number of excited states. We compare experimentally quantum dots …
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Investigation of the ultrafast fiber and hybrid laser systems and their nonlinear wavelength conversion methods in the infrared spectral region /
… is introduced. In the third part, the effective wavelength conversion method to near-infrared based on stimulated Raman amplification is demonstrated. The concept of an ultra-compact laser source that implements a GHz burst pump source, synchronous pumping, and oscillator repetition rate locking …
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Optical pulse processing towards Tb/s high-speed photonic systems
… routing. Two sub-systems (pulse generation and wavelength conversion), which exploit optical processing techniques are explored within this thesis. Future systems will require high-quality pulse sources and this thesis develops the pulse generation technique of gain switching to provide simple …
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New optical fibre based technologies and their application in highly nonlinear systems
… the presented fibres are employed in all-optical wavelength conversion schemes based on four-wave-mixing. Numerical simulations and experimental results are combined to study the performance of the fibres and demonstrate their use in wavelength conversion devices. In particular, a lead-silicate …
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Nonlinear applications of step-index and microstructured soft-glass fibres
… profile, with a zero-dispersion wavelength lying close to the C-band is demonstrated in cross-phase modulation based wavelength conversion and switching applications in the 1.55 µm window. Both a co-polarized pump and probe scheme and a Kerr-shutter configuration are considered. …
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Tunable Optical Group Delay in Active Semiconductor Optoelectronic Devices
… is then proposed and demonstrated using wavelength conversion in a distributed-feedback laser. This scheme provides microwave phase shifts greater than 140° over GHz bandwidths, and is relatively insensitive to the input wavelength. Finally, future prospects for tunable delay elements …
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Light Propagation in Ultracold Atomic Gases
… Applications of this concept concerning wavelength conversion and reshaping of the pulse are also discussed for realistic experimental situations.
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Investigation of nonlinear processes and device designs applicable to the creation of a compact, broadly tunable laser based on a tantalum pentoxide planar lightwave circuit platform
… devices utilize phase-matched parametric wavelength conversion in a nonlinear medium to create a widely tunable pulsed laser source. Currently most of nonlinear lasers are based on bulk optics or photonic fibres. Lasers based on bulk optics utilizing nonlinear crystals in conjunction with …
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Silicon Photonics for All-Optical Processing and High-Bandwidth-Density Interconnects
… holistic analysis for the full link captures the wavelength-channel-spacing dependent characteristics, provides some methodologies for device design in the WDM-operation context, and provides performance predictions based on current best-of-class silicon photonic devices. The key results of the …
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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. …
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Fabrication and applications of zinc indiffused waveguides in periodically poled lithium niobate
A comprehensive investigation of high conversion efficiency second harmonic generation (SHG) devices based on zinc indiffused channel waveguides in periodically poled lithium niobate (PPLN) is reported in this thesis. The thesis covers all stages from the production of PPLN by domain inversion on a …
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Photonic integrated circuits for optical logic applications
… at the MZI output. Boolean logic and wavelength conversion can be achieved using this technique, building blocks for optical switching and signal regeneration. The fabrication of these devices is complex and the fabrication of two generations of devices is described in this thesis, …
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Semiconductor-based all-optical switching for optical time-division multiplexed networks
… of 100 Gbit/s. We demonstrate demultiplexing, wavelength conversion, and format conversion of optical PPM signals at data rates as high as 80 Gbit/s. Finally, we report on experimental demonstrations of an optical interface for slotted OTDM networks.
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All-optical interferometric switches for data regeneration in fiber optic networks
… to achieve many basic network tasks, like wavelength conversion, packet switching, and data regeneration. As data rates increase, the impairments caused by propagation through the glass of optical fiber become worse. Chromatic dispersion causes the temporal broadening of optical bits during …
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Nonlinear Periodic Structures: From Classical to Quantum Devices
… designed and used for classical optical wavelength conversion such as second harmonic generation and difference frequency generation. In this work, these devices are exploited for spontaneous down conversion, which is a quantum effect, for the first time, through this process, entangled …
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Performance of multichannel fiber optic parametric amplifier
… In fiber optic communication systems, Dense Wavelength Division Multiplexing (DWDM) is very popular in which multiple optical signals at various wavelengths are combined and transmitted through a single fiber. DWDM technology provides a cost effective deployment strategy. One of the key …
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Investigation of dual-pump fiber optical parametric amplifier using highly nonlinear dispersion shifted fiber
… adjustable gain and mid-frequency spectra, wavelength conversion, phase conjugation, pulse processing for signal processing and 0 dB noise counting. Furthermore, single pump FOPA had limited parametric gain over wide bandwidth, in addition to the difficulty to obtain an equalized power. To …
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Discrete Wave Propagation In Quadratically Nonlinear Media
… all-optical spatial switching and frequency conversion device based on quadratic waveguide array is demonstrated. Spatial routing and wavelength conversion of milliwatt signals is achieved without pulse distortions.
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