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Topic Area: Physics

Displaying records 501 to 510 of 705 records.
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501. Superconducting transition edge sensor using dilute AlMn alloys
Topic: Physics
Published: 7/6/2004
Authors: Steven Deiker, William Bertrand Doriese, Gene C Hilton, Kent D Irwin, William H Rippard, Joel Nathan Ullom, Leila R Vale, Steve T Ruggiero, Anthony Williams, B. Young
Abstract: We have fabricated a bolometer using a transition-edge sensor (TES) made of Al doped with Mn to suppress the superconducting critical temperature !Tc" of Al from #1 K to #100 mK. The resulting detector exhibits low-frequency noise consistent with t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31652

502. Extremely low noise microwave signals synthesized from stable CW lasers with femtosecond laser frequency combs
Topic: Physics
Published: 5/17/2004
Authors: A Bartels, Scott A Diddams, Christopher W Oates, G Wilpers, Windell Oskay, James C Bergquist, Leo W. Hollberg
Abstract: A femtosecond laser frequency comb transfers the low phase and frequency noise of a cavity-stabilized CW laser to the microwave domain. Phase noise of -115 dBc/Hz at 1 Hz offset from the 1 GHz carrier is achieved.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50120

503. 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^. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50121

504. 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
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105130

505. 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
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104845

506. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31616

507. Mini-conference on laser-induced fluorescence in plasmas
Topic: Physics
Published: 4/23/2004
Authors: Fred Skiff, John J Bollinger
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105084

508. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850779

509. 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
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105011

510. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905284



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