Development of ultrashort pulse fiber lasers for optical communication utilizing semiconductor devices

Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.Includes bibliographical references (p. 131-139).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.The nonlinear reflectivity of semiconductor saturable absorber mirrors is investigated with ultrafast time-resolved and time-averaged reflectivity measurements. The relative contributions of absorption bleaching and induced absorption are studied as a function of fluence and wavelength. The impact of induced absorption on the stability of continuous-wave mode-locking is considered theoretically. Picosecond pulses are produced from an Er/Yb waveguide laser using a semiconductor saturable absorber mirror, and the influence of two-photon absorption on mode-locking is studied. A semiconductor mirror exhibiting only induced absorption is used to stabilize a GHz repetition rate active harmonically mode-locked fiber laser, improving supermode suppression by eliminating pulse dropouts.by Erik R. Thoen.Ph.D

Femtosecond gain-index coupling in femtosecond nonlinearity measurements of InGaAsP diode laser amplifiers

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.Includes bibliographical references (p. 69-72).by Erik R. Thoen.M.S

Epitaxial Growth and Processing of Compound Semiconductors

Contains an introduction and reports on three research projects.MIT Lincoln LaboratoryU.S. Air Force - Office of Scientific Research Grant F49620-96-1-0126National Science Foundation Grant DMR 94-00334Joint Services Electronics Progra

Nanostructures Technology, Research, and Applications

Contains reports on twenty-four research projects and a list of publications.Joint Services Electronics Program Grant DAAHO4-95-1-0038Defense Advanced Research Projects Agency/Semiconductor Research Corporation SA1645-25508PGU.S. Army Research Office Grant DAAHO4-95-1-0564Defense Advanced Research Projects Agency/U.S. Navy - Naval Air Systems Command Contract N00019-95-K-0131Suss Advanced Lithography P. O. 51668National Aeronautics and Space Administration Contract NAS8-38249National Aeronautics and Space Administration Grant NAGW-2003Defense Advanced Research Projects Agency/U.S. Army Research Office Grant DAAHO4-951-05643M CorporationDefense Advanced Research Projects Agency/U.S. Navy - Office of Naval Research Contract N66001-97-1-8909National Science Foundation Graduate FellowshipU.S. Army Research Office Contract DAAHO4-94-G-0377National Science Foundation Contract DMR-940034National Science Foundation Grant DMR 94-00334Defense Advanced Research Projects Agency/U.S. Air Force - Office of Scientific Research Contract F49620-96-1-0126Harvard-Smithsonian Astrophysical Observatory Contract SV630304National Aeronautics and Space Administration Grant NAG5-5105Los Alamos National Laboratory Contract E57800017-9GSouthwest Research Institute Contract 83832MIT Lincoln Laboratory Advanced Concepts ProgramMIT Lincoln Laboratory Contract BX-655

Analysis of NxM Waveguide Splitters and Couplers with Multimode Guiding Sections

Highly multimode waveguides in which multiple image of the input excitation are formed at different distances along the guide can be used for splitting and switching applications. The e devices are often analyzed with a paraxial approximation. In the analysis presented here, an effective index dielectric slab waveguide model is implemented to account for the actual shapes and propagation constants of the modes. The analysis was performed on lxN splitters with a centered input, NxM couplers with off-center inputs, and NxMxl cascaded combinations of couplers and combiner. The sensitivity of the output intensity of the devices to changes in longitudinal output guide position, lateral input guide position, multimode width, input wavelength, and input phase were all investigated. The sensitivity curves demonstrate that higher output efficiencies are possible than with the typical paraxial approximation. Optimization was performed on the parameters of various cascaded devices, and the results demonstrated that output intensities could be increased by 34% over typical paraxial approximation design

Optics and Quantum Electronics

Contains table of contents for Section 3, reports on eighteen research projects and a list of publications.Defense Advanced Research Projects Agency Grant F49620-96-0126U.S. Air Force - Office of Scientific Research Grant F49620-98-1-0139Defense Advanced Research Projects AgencyJoint Services Electronics ProgramU.S. Air Force - Office of Scientific ResearchNational Science FoundationU.S. Navy - Office of Naval ResearchCharles S. Draper LaboratoryNational Science Foundation/MRSECJoint Services Electronics Program Grant DAAH04-95-1-0038U.S. Air Force - Office of Scientific Research Contract F49620-95-1-0221U.S. Navy - Office of Naval Research (MFEL) Contract N00014-91-J-1956U.S. Navy - Office of Naval Research (MFEL) Contract N000014-97-1-1066National Institutes of Health Grant 9RO1 EY11289-12National Institutes of Health Grant 1R01 CA75289-01U.S. Navy - Office of Naval Research/MFEL Contract N00014-94-1-071