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Topic Area: Physics

Displaying records 561 to 570 of 763 records.
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561. Precision tests of femtosecond laser optical frequency synthesizers
Topic: Physics
Published: 5/17/2004
Authors: Long-Sheng Ma, Lennart Robertsson, Massimo Zucco, Zhiyi Bi, Robert Windeler, A Bartels, G Wilpers, Christopher W Oates, Leo W. Hollberg, Scott A Diddams
Abstract: We compare the accuracy of femtosecond laser optical frequency synthesizers that employ microstructured fibers with those that directly generate a broadband output. No limitation of either system is found at fractional frequency levels of 1x10^u-18^. ...

562. Sub-hertz stabilization of femtosecond laser frequency combs
Topic: Physics
Published: 5/17/2004
Authors: A Bartels, Christopher W Oates, Leo W. Hollberg, Scott A Diddams

563. Stabilization of femtosecond laser frequency combs with subhertz residual linewidths
Topic: Physics
Published: 5/15/2004
Authors: A Bartels, Christopher W Oates, Leo W. Hollberg, Scott A Diddams

564. Characterization and Reduction of Unexplained Noise in Superconducting Transition-Edge Sensors
Topic: Physics
Published: 5/7/2004
Authors: Joel Nathan Ullom, William Bertrand Doriese, Gene C Hilton, James A Beall, Steven Deiker, William Duncan, S. Lisa Ferreira, Kent D Irwin, Carl D Reintsema, Leila R Vale
Abstract: The noise in superconducting Transition-Edge Sensors (TESs) commonly exceeds simple theoretical predictions. The reason for this discrepancy is presently unexplained. We have measured the amplitude and frequency dependence of the noise in TES sensors ...

565. Mini-conference on laser-induced fluorescence in plasmas
Topic: Physics
Published: 4/23/2004
Authors: Fred Skiff, John J Bollinger

566. Dipole Moment of a Pb-O Vacancy Pair in PbTiO^d3^
Topic: Physics
Published: 4/1/2004
Authors: Eric J Cockayne, Benjamin P Burton
Abstract: The polarization of a nearest-neighbor (nn) Pb-O vacancy pair in PbTiO3 is calculated, using the modern theory of polarization, implemented in the density functional theory ultrasoft pseudopotential formalism. The dipole moment per divacancy is about ...

567. Optical frequency synthesis and comparison at the 10^u-19^ level
Topic: Physics
Published: 3/19/2004
Authors: L-S Bi Ma, A Bartels, Lennart Robertsson, Massimo Zucco, R S Windeler, G Wilpers, Christopher W Oates, Leo W. Hollberg, Scott A Diddams

568. The First Measurements with Octave-Spanning Femtosecond Laser Frequency Combs
Topic: Physics
Published: 3/13/2004
Authors: Scott A Diddams, David J. Jones
Abstract: Here we describe in a historical manner the first optical frequency measurement measurements with octave-spanning frequency combs and the first measurement and stabilization of the carrier-envelope offset frequency for a train of femtosecond laser pu ...

569. Critical field for complete vortex expulsion from narrow superconducting strips
Topic: Physics
Published: 3/5/2004
Authors: G Stan, S. Field, John M. Martinis
Abstract: We have measured the maximum field for which vortices are completely expelled from a thin-film superconducting strip. Niobium strips of width W were field cooled and imaged with a scanning Hallprobe microscope. Below a critical field Bm  0=W2 all ...

570. Absolute-frequency measurements with a stabilized near-infrared optical frequency comb from a Cr:forsterite laser
Topic: Physics
Published: 2/15/2004
Authors: K L Corwin, I Thomann, A Bartels, T Dennis, Richard W Fox, W C Swann, E A Curtis, Christopher W Oates, G Wilpers, S L Gilbert, Leo W. Hollberg, Nathan Reynolds Newbury, Scott A Diddams, J Nicholson, M. F. Yan

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