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.
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Showing 1 to 20 of 23 for “"Optical clock"”.
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Active optical clock distribution
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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PLL-based active optical clock distribution
Reducing the timing uncertainty associated with clock edges has become an exceedingly difficult problem as clock frequencies in high-performance processors increase past several gigahertz. Absolute quantities of skew and jitter that were insignificant at lower frequencies now consume an …
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An on chip low skew optical clock receiver
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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A 9GHz injection locked loop optical clock receiver in 32-nm CMOS
… provide high-bandwidth low-power signal and clock distribution for multicore processors, by exploiting wavelength-division multiplexing. This thesis presents the technology environment of the monolithic optical/electrical chip, and then focuses on how an optical method would look like for …
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A low-skew, low jitter receiver circuit for on-chip optical clock distribution
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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All-optical clock recovery using a mode-locked fiber figure-eight laser with a semiconductor nonlinearity
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Development of the recess mounting with monolithic metallization optoelectronic integrated circuit technology for optical clock distribution applications
Recess mounting with monolithic metallization, or RM3 integration, is used to integrate Ino.47Ga0.53As/InP based lattice-matched high quantum efficiency p-i-n photodetectors on silicon chips to build high performance optoelectronic integrated circuits [1]. In RM3 integration, partially processed …
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Trapping, laser cooling, and spectroscopy of Thorium IV
Application of precision laser spectroscopy and optical clock technology to the ground and metastable, first excited state of the ²²⁹Th nucleus at < 10 eV has significant potential for use in optical frequency metrology and tests of variation of fundamental constants. This work is a report on the …
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Radio frequency and terahertz signals generated by passively mode-locked semiconductor lasers
… semiconductor lasers have many applications in optical communications, such as radio-over-fibre, or all-optical clock extraction. Terahertz signals are the focus of many research bodies nowadays, due to their interaction with matter. They have potential applications in areas like: industry, …
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Exploring Novel Quantum Physics Using Ytterbium-171 in An Optical Cavity
… from the ground state manifold to the optical clock transition for its 105 times faster phase accumulation and higher relative accuracy compared with an rf-clock. We infer a 4.4dB of improvement in performance, which is the first demonstration of the quantum entanglement-assisted …
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Automated SG-DBR Tunable Laser Calibration Optimized for Optical Coherence Tomography Applications
… at faster repetition rates. Swept Source Optical Coherence Tomography (SS-OCT) requires a tunable laser source that exhibits linear frequency sweeps, large frequency spans, and high repetition rates. This work accomplishes this by using four synchronized waveforms sent to the input of a …
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Intrachip clock signal distribution via si-based optical interconnect
The Optical clocking has emerged as an innovative alternative approach to the electrical clocking, in order to overcome the difficulties associated with electrical interconnects in the synchronization of high-performance multi-GHz microprocessors. Because the on-chip optical interconnect must be …
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Post assembly process development for Monolithic OptoPill integration on silicon CMOS
… as long wavelength photodetectors with an optical clock receiver circuit. Fabrication procedures, challenges experienced, and results accomplished are presented for each process step including the formation of alloyed and non-alloyed ohmic contacts on n-type and p-type InGaAs contact …
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The impact of WH/TS codes in implementing incoherent OCDMA system
… last-mile solution for high-speed high-capacity optical networks capable of securely supporting a large number of simultaneous users by minimal hardware requirements is needed. Optical code division multiple access (OCDMA) is an advanced multiplexing scheme which provides a more efficient and …
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Isotope shift spectroscopy of ions in cryogenically cooled neutral plasmas
… neodymium to measure the isotope shifts of two optical transitions in Nd+ with MHz-level accuracy. The experiment employs the cryogenic ion source, which is designed to produce cold and dense neutral plasmas by laser ablation of metal targets, followed by cryogenic buffer gas cooling. In this …
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Probing New Physics with Spectroscopy of Trapped Ions
… King-plot nonlinearities thus observed for the optical clock transitions in Yb⁺ ions with significance up to 240 standard deviations 𝜎 and their implications to the new boson and nuclear physics are presented. In particular, there is a dominant, common source of nonlinearity originating from …
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The development of components for ultrafast all-optical communication networks
… need for ultrafast (greater than 100 Gbps) all-optical communication networks is amplified as the amount of data-containing communication traffic continues to grow at an exorbitant rate. Multiplexing schemes are attractive, as they enable increased transmission over silica fiber already buried …
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All-semiconductor High Power Mode-locked Laser System
All-optical synchronization and its application in advanced optical communications have been investigated in this dissertation. Dynamics of all-optical timing synchronization (clock recovery) using multi-section gain-coupled distributed-feedback (MS-GC DFB) lasers are discussed. A record speed of …
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Measuring the Frequency of Light using Femtosecond Laser Pulses
… standard of reference. Therefore in precision optical frequency measurements optical frequencies on the order of several 100 THz – too fast to be counted with any electronics – have to be compared with radio frequencies on the order of a few GHz. The basic idea here is to measure dierences …
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Analysis of Photonic Structures for Optical Networks
… de la Célula Lógica Programable Óptica (Optically Programmable Logic Cell, OPLC) basadas en Láseres de Pozo Cuántico, capaces de proporcionar diferentes funciones lógicas booleanas y se propone teóricamente un circuito de recuperación de la señal de reloj utilizando OPLCs. Finalmente, se …
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