Title :
Observation of a Sub-10-Hz Linewidth 88Sr+ 2S1/2–2D5/2 Clock Transition at 674 nm
Author :
Barwood, Geoffrey P. ; Gill, Patrick ; Huang, Guilong ; Klein, Hugh A.
Author_Institution :
Nat. Phys. Lab., Teddington
fDate :
4/1/2007 12:00:00 AM
Abstract :
In this paper, a pair of diode lasers at 674 nm, locked to two independent ultralow-expansion high-finesse cavities, have been characterized by monitoring the beat frequency between them. The individual laser linewidth of 1.4 Hz for a 3-s averaging time broadened to 4 Hz at 30 s. The relative frequency stability of the beat at 1s is 2.5 10-15. One of the lasers has been used to interrogate the 88Sr+ 2Si1/2-2D 5/2 transition at 674 nm, and a transition linewidth of 9 Hz has been observed
Keywords :
atomic clocks; frequency measurement; semiconductor lasers; 1.4 Hz; 10 Hz; 3 sec; 30 sec; 4 Hz; 674 nm; 9 Hz; atomic clocks; beat frequency monitoring; clock transition; diode lasers; laser stability; semiconductor lasers; Clocks; Cooling; Frequency; Laboratories; Laser stability; Laser transitions; Optical harmonic generation; Particle beam optics; Semiconductor lasers; Strontium; Atomic clocks; laser stability; semiconductor lasers;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.891142
