U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Elizabeth Donley (Assoc)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 76 - 100 of 166

A Compact Cold-Atom Frequency Standard Based on Coherent Population Trapping

May 24, 2012
Author(s)
Francois-Xavier R. Esnault, John Kitching, Elizabeth Donley
We present the status of our cold-atom clock based on coherent population trapping, including the present clock stability and a preliminary evaluation of the three main systematic frequency shifts: the 1st-order Doppler shift, the Zeeman shift, and the

Atom-number amplification in a magneto-optical trap via stimulated light forces

January 10, 2012
Author(s)
Elizabeth A. Donley, Tara C. Liebisch, Eric M. Blanshan, John E. Kitching
We have decelerated an atomic beam of 87 Rb using a stimulated-emission slowing technique that makes use of a bichromatic standing light wave of high intensity and increased the load rate into a small magneto-optical trap by up to a factor of 20. We

Atomic Sensors - A Review

September 1, 2011
Author(s)
John E. Kitching, Svenja A. Knappe, Elizabeth A. Donley
We discuss the basic physics and instrumentation issues related to high performance physical and inertial sensors based on atomic spectroscopy.

Offset phase locking of noisy diode lasers aided by frequency division

August 31, 2011
Author(s)
Elizabeth A. Donley, Eugene N. Ivanov, Francois-Xavier R. Esnault
For heterodyne phase locking, frequency division of the beat note between two oscillators can improve the reliability of the phase lock and the quality of the phase synchronization. Frequency division can also reduce the size, weight, power, and cost of

Comparing Room Temperature and Cryogenic Cesium Fountains

July 31, 2011
Author(s)
Steven R. Jefferts, Thomas P. Heavner, Thomas E. Parker, Jon H. Shirley, Elizabeth A. Donley, Filippo Levi, Davide Calonico, C Calosso, Giovanni Costanzo, B. Mongino
We have compared the frequency of a room temperature cesium fountain primary frequency standard with that of a cryogenic (~80K) cesium fountain. This comparison yields a measurement of the blackbody frequency shift of the room temperature fountain.

MOT Loading Enhancement with Stimulated Light Forces

July 31, 2011
Author(s)
Elizabeth A. Donley, Tara C. Liebisch, Eric M. Blanshan, John E. Kitching
We demonstrate atom number enhancement in a magneto-optical trap (MOT) by use of bichromatic cooling to slow an atomic beam that is loaded into a MOT. Bichromatic cooling employs stimulated emission to apply strong cooling forces that are not limited by

Status of a compact cold-atom CPT frequency standard

July 31, 2011
Author(s)
Elizabeth A. Donley, Francois-Xavier R. Esnault, John E. Kitching, Eugene N. Ivanov
We describe the main progress towards the realization of a cold atom frequency standard based on coherent population trapping (CPT). We explain our particular CPT configuration and give details on the experimental setup.

Nuclear Magnetic Resonance Gyroscopes

November 2, 2010
Author(s)
Elizabeth A. Donley
Nuclear magnetic resonance gyroscopes(NMRGs)detect rotation as shift in the Larmor precession frequency of nuclear spins. A review of the open literature on NMRGs is presented, which includes an introduction to the spectroscopic techniques that enable

Towards a compact cold atom frequency standard based on coherent populatoin trapping

June 2, 2010
Author(s)
Francois-Xavier R. Esnault, Elizabeth Donley, John Kitching
We describe in this paper the main features of a cold atom CPT based frequency standard. We explain our particular CPT configuration and our experimental setup. as well as present simulations of the expected performance (stability and major systematics)

Rubidium Vapor Cell with Integrated Bragg Reflectors for Compact Atomic MEMS

June 9, 2009
Author(s)
Maximillian Perez, Uyen Nguyen, Svenja A. Knappe, Elizabeth Donley, John Kitching, A Shkel
This paper reports on a method for improving the optical efficiency of micro-machined reflectors integrated in rubidium vapor cells for application in atomic MEMS sensors. A hybrid bulk micromachining and multilayer PECVD thin film process is used to form

Nuclear quadrupole resonances in compact vapor cells: The crossover between the NMR and the nuclear quadrupole resonance interaction regimes

January 22, 2009
Author(s)
Elizabeth A. Donley, Jonathan Long, Tara C. Liebisch, Eleanor Hodby, Ted Fisher, John E. Kitching
We trace the transformation of I = 3/2 131-Xe nuclear spin resonances from the pure nuclear quadrupole regime to the quadrupole-perturbed Zeeman regime. We achieve large nuclear quadrupole shifts by using a 1mm 3 cubic cell with walls of different

Chip-scale atomic devices: precision atomic instruments based on MEMS

October 5, 2008
Author(s)
John E. Kitching, Svenja A. Knappe, Vladislav Gerginov, Vishal Shah, Peter D. Schwindt, Brad Lindseth, Elizabeth A. Donley, Ying-ju Wang, Eleanor Hodby, Matt Eardley, Ricardo Jimenez Martinez, William C. Griffith, Andrew Geraci, Jan Preusser, Tara C. Liebisch, Hugh Robinson, Leo Hollberg
We describe recent work at NIST to develop compact, low-power instruments based on a combination of precision atomic spectroscopy, advanced diode lasers and microelectromechanical systems (MEMS). Designed to be fabricated in parallel in large numbers