12 research outputs found
Dynamic properties of dilute Bose-Einstein condensates
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.Includes bibliographical references (p. 191-204).by Dallin S. Durfee.Ph.D
A High Temperature Calcium Vapor Cell for Spectroscopy on the 4s^2 1S0 to 4s4p 3P1 Intercombination Line
We have demonstrated a high temperature vapor cell for absorption
spectroscopy on the Ca intercombination line. The cell uses a dual chamber
design to achieve the high temperatures necessary for an optically dense vapor
while avoiding the necessity of high temperature vacuum valves and
glass-to-metal seals. We have observed over 50 percent absorption in a single
pass through the cell. Although pressure broadening in the cell prevented us
from performing saturated-absorption spectroscopy, the broadening resulted in
higher signal-to-noise ratios by allowing us to probe the atoms with
intensities much greater than the 0.2 uW/cm^2 saturation intensity of the
unbroadened transition.Comment: 5 pages, 2 figures, submitted to Rev. Sci. Instru
An Ultra-High Stability, Low-Noise Laser Current Driver with Digital Control
We present a low-noise, high modulation-bandwidth design for a laser current
driver with excellent long term stability. The driver improves upon the
commonly-used Hall-Libbrecht design. The current driver can be operated
remotely by way of a micro-processing unit, which controls the current set
point digitally. This allows precise repeatability and improved accuracy and
stability. It also allows the driver to be placed near the laser for reduced
noise and for lower phase lag when using the modulation input. We present the
theory of operation for our driver in detail, and give a thorough
characterization of its stability, noise, set point accuracy and repeatability,
temperature dependence, transient response, and modulation bandwidth.Comment: 9 pages, 4 figures, accepted for publication in Review of Scientific
Instrument
Basic Atomic Physics
Contains reports on five research projects.National Science Foundation Grant PHY 96-024740National Science Foundation Grant PHY 92-21489U.S. Navy - Office of Naval Research Contract N00014-96-1-0484Joint Services Electronics Program Grant DAAHO4-95-1-0038National Science Foundation Grant PHY95-14795U.S. Army Research Office Contract DAAHO4-94-G-0170U.S. Army Research Office Contract DAAG55-97-1-0236U.S. Army Research Office Contract DAAH04-95-1-0533U.S. Navy - Office of Naval Research Contract N00014-96-1-0432National Science Foundation Contract PHY92-22768David and Lucile Packard Foundation Grant 96-5158National Science Foundation Grant PHY 95-01984U.S. Army Research OfficeU.S. Navy - Office of Naval Research Contract N00014-96-1-0485AASERT N00014-94-1-080
Basic Atomic Physics
Contains reports on five research projects.Joint Services Electronics Program Grant DAAH04-95-1-0038National Science Foundation Grant PHY 92-21489U.S. Navy - Office of Naval Research Grant N00014-90-J-1322National Science Foundation Grant PHY95-14795Charles S. Draper Laboratory Contract DL-H-484775U.S. Army Research Office Contract DAAH04-94-G-0170U.S. Army Research Office Contract DAAH04-95-1-0533U.S. Navy - Office of Naval Research Contract N00014-89-J-1207U.S. Navy - Office of Naval Research Contract N000014-96-1-0432David and Lucile Packard Foundation Grant 96-5158National Science Foundation Grant PHY95-01984U.S. Army - Office of ResearchU.S. Navy - Office of Naval Research Contract N00014-96-1-0485U.S. Navy - Office of Naval Research AASERT N00014-94-1-080
Basic Atomic Physics
Contains reports on five research projects.Joint Services Electronics Program Grant DAAH04-95-1-0038National Science Foundation Grant PHY 92-21489U.S. Navy - Office of Naval Research Grant N00014-90-J-1322National Science Foundation Grant PHY 92-22768Charles S. Draper Laboratory Contract DL-H-4847759U.S. Army - Office of Scientific Research Grant DAAL03-92-G-0229U.S. Army - Office of Scientific Research Grant DAAL01-92-6-0197U.S. Navy - Office of Naval Research Grant N00014-89-J-1207Alfred P. Sloan FoundationNational Science Foundation Grant PHY 95-01984U.S. Army Research Office Contract DAAL01-92-C-0001U.S. Navy - Office of Naval Research Grant N00014-90-J-1642U.S. Navy - Office of Naval Research Grant N00014-94-1-080