Optical Frequency Metrology of an Iodine-Stabilized He-Ne Laser Using the Frequency Comb of a Quantum-Interference-Stabilized Mode-Locked Laser.
We perform optical frequency metrology of an iodine-stabilized He-Ne laser using a mode-locked Ti:sapphire laser frequency comb that is stabilized using quantum interference of photocurrents in a semiconductor. Using this technique, we demonstrate carrier-envelope offset frequency fluctuations of less than 5 mHz using a 1 s gate time. With the resulting stable frequency comb, we measure the optical frequency of the iodine transition [(127)I2 R(127) 11-5 i component] to be 473 612 214 712.96 ± 0.66 kHz, well within the uncertainty of the CIPM recommended value. The stability of the quantum interference technique is high enough such that it does not limit the measurements.
JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440.
Ryan P
RP
Smith
JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440.
Peter A
PA
Roos
JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440.
Jared K
JK
Wahlstrand
JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440.
Jessica A
JA
Pipis
Department of Aerospace Engineering, University of Colorado, Boulder, CO 80309-0429.
Maria Belmonte
MB
Rivas
JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309-0440.
Steven T
ST
Cundiff
femtosecond (fs) lasers; laser frequency control; optical clocks; optical frequency comb; optical frequency measurement; stabilized lasers