The cooling of atoms to microkelvin temperatures using lasers is currently enabling a new generation of precision instruments that take advantage of the long interaction times and weak environmental coupling. Our group develops compact versions of these instruments for use as commercial instruments or in space, where power and volume are limited. These instruments include accurate yet compact atomic clocks and portable atom interferometers for gravimetry and inertial sensing. We also explore innovative advances in laser cooling physics that could enhance the performance of these instruments. For example, we are developing methods of increasing the number of laser-cooled atoms in small capture volumes for signal enhancement and improved stability.
Novel Laser Cooling for Sensor Applications
G. W. Hoth, E. A. Donley, and J. Kitching, "Atom number in magneto-optic traps with millimeter scale laser beams," Opt. Lett. 38, 661-663 (2013) (Link: http://tf.boulder.nist.gov/general/pdf/2666.pdf)
T.C. Liebisch, E. Blanshan, E.A. Donley, and J. Kitching, "Atom-number amplification in a magneto-optical trap via stimulated light forces," Phys. Rev. A 85, 013407-4 (2012) (Link: http://tf.boulder.nist.gov/general/pdf/2581.pdf)
T.C. Liebisch, E. Blanshan, E.A. Donley, and J. Kitching, "MOT loading enhancement with stimulated light forces," Proc. 2011 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and EFTF Conf., 808-810 (2011). (Link: http://tf.boulder.nist.gov/general/pdf/2551.pdf)
E. A. Donley, T. C. Liebisch, E. Blanshan, and J. Kitching, "Number enhancement for compact laser-cooled atomic samples by use of stimulated radiation forces," Proc. 2010 IEEE Intl. Freq. Cont. Symp., 125-128 (2010) (Link: http://tf.boulder.nist.gov/general/pdf/2463.pdf).
Cold-Atom Clocks Based on Coherent Population Trapping (CPT) 1. F.-X. Esnault, E. Blanshan, E. N. Ivanov, R. E. Scholten, J. Kitching, and E. A. Donley, " A cold-atom double-lambda CPT clock," In Preparation.
E. A. Donley, F.-X. Esnault, E. Blanshan, and J. Kitching, "A cold-atom clock based on coherent population trapping," Proceedings of the 44th annual Precise Time and Time Interval Systems and Applications Meeting, Reston, VA, pp. 327-333 (2012). (Link: http://tf.boulder.nist.gov/general/pdf/2664.pdf)
F.-X. Esnault, J. Kitching , and E. A. Donley, "A compact cold-atom frequency standard based on coherent population trapping," Proc. 2012 IEEE Intl. Freq. Cont. Symp., Baltimore, MD, pp. 697-699 (2012). (Link: http://tf.boulder.nist.gov/general/pdf/2636.pdf).
F.-X. Esnault, E.A. Donley, J. Kitching, and E.N. Ivanov, "Status of a compact cold-atom CPT frequency standard," Proc. 2011 Joint Mtg. IEEE Intl. Freq. Cont. Symp. and EFTF Conf., pp. 612-614 (2011). (Link: http://tf.boulder.nist.gov/general/pdf/2550.pdf)
E. N. Ivanov, F.-X. Esnault, and E. A. Donley, "Offset phase locking of noisy diode lasers aided by frequency division," Rev. Sci. Instrum. 82, 083110 (2011). (Link: http://tf.boulder.nist.gov/general/pdf/2530.pdf).
F.-X. Esnault, E. A. Donley, and J. Kitching, "Towards a compact cold atom frequency standard based on coherent population trapping," Proc. 2010 IEEE Intl. Freq. Cont. Symp., 465-469 (2010). (Link: http://tf.boulder.nist.gov/general/pdf/2462.pdf).
Start Date:July 1, 2009
Lead Organizational Unit:pml
Source of Extramural Funding:
Work funded in part by the Defence Advanced Research Projects Ageny (DARPA).
Atomic Devices and Instruments Group