Title :
Accurate removal of RAM from FM laser beams
Author :
Hall, John L. ; Wei Zhang ; Jun Ye
Author_Institution :
JILA, Boulder, CO, USA
Abstract :
We demonstrate here a RAM cancellation method of reaching locking accuracy at shot-noise sensitivity level, and with a reserve precision sufficient to still be free of RAM-induced problems when the bandwidth has been narrowed to some tens of milliHz. Non-optical rf pickup sets the current limit at 2.8 ppm. Basically this paper announces the RAM-Buster approach needed to achieve the ideal spectroscopic accuracy, shotnoise-limited, as had been anticipated in the 1983 Drever et al. paper.
Keywords :
amplitude modulation; frequency modulation; optical modulation; shot noise; FM laser beam; RAM cancellation method; RAM-buster approach; nonoptical RF pickup set; residual amplitude modulation; shot-noise sensitivity level; spectroscopic; Frequency modulation; Laser noise; Radio frequency; Random access memory; Servomotors; RAM removal; line-center definition; locking accuracy;
Conference_Titel :
Frequency Control Symposium & the European Frequency and Time Forum (FCS), 2015 Joint Conference of the IEEE International
Print_ISBN :
978-1-4799-8865-5
DOI :
10.1109/FCS.2015.7138941
