Andrew Ludlow

Publications

Hyperpolarizability and Operational Magic Wavelength in an Optical Lattice Clock

December 19, 2017

Author(s):

Roger C. Brown, Nate B. Phillips, Kyle P. Beloy, William F. McGrew, Marco Schioppo, Robert J. Fasano, Gianmaria Milani, Xiaogang Zhang, Nathan M. Hinkley, Holly F. Leopardi, T H. Yoon, Daniele Nicolodi, Tara M. Fortier, Andrew D. Ludlow

Optical clocks benefit from tight atomic confinement enabling extended interrogation times as well as Doppler- and recoil-free operation. However, these...

Photonic-Chip Supercontinuum with Tailored Spectra for Counting Optical Frequencies

July 24, 2017

Author(s):

David R. Carlson, Daniel D. Hickstein, Alexander J. Lind, Judith B. Olson, Richard W. Fox, Roger C. Brown, Andrew D. Ludlow, Qing Li, Daron A. Westly, Tara M. Fortier, Kartik A. Srinivasan, Scott A. Diddams, Scott B. Papp

Supercontinuum generation using chip-integrated photonic waveguides is a powerful approach for spectrally broadening pulsed laser sources with very low pulse...

A compact, thermal noise limited reference cavity for ultra-low noise microwave generation

March 23, 2017

Author(s):

Josue Davila-Rodriguez, Frederick N. Baynes, Andrew D. Ludlow, Tara M. Fortier, Holly F. Leopardi, Scott A. Diddams, Franklyn J. Quinlan

A 25 mm long, rigidly-held, ultra-stable optical frequency reference cavity is demonstrated. The cavity spacer has an easy-to-manufacture cylindrical shape...

Ultra-stable optical clock with two cold-atom ensembles

January 01, 2017

Author(s):

Marco Schioppo, Roger C. Brown, William F. McGrew, Nathan M. Hinkley, Robert J. Fasano, Kyle P. Beloy, Gianmaria Milani, Daniele Nicolodi, Jeffrey A. Sherman, Nate B. Phillips, Christopher W. Oates, Andrew D. Ludlow

Atomic clocks based on optical transitions are the most stable, and therefore precise, timekeepers available. These clocks operate by alternating intervals of...

Optically referenced broadband electronic synthesizer with 15 digits of resolution

September 05, 2016

Author(s):

Franklyn J. Quinlan, Tara M. Fortier, A. Rolland, Frederick N. Baynes, A. J. Metcalf, Archita Hati, Andrew D. Ludlow, Nathan M. Hinkley, M. Shimizu, Joe Campbell, Scott A. Diddams

Increasing demands in the high tech industry for higher data rates and better synchronization necessitates the development of new wideband and tunable sources...