Optimization of FM spectroscopy parameters for a frequency locking loop in small scale CPT based atomic clocks

被引：15

作者：

Ben-Aroya, I. ^{[1
]}

Kahanov, M. ^{[1
]}

Eisenstein, G. ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel

来源：

OPTICS EXPRESS | 2007年 / 15卷 / 23期

关键词：

D O I：

10.1364/OE.15.015060

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe the optimization of a Frequency Locked Loop (FLL) in an atomic clock which is based on Coherent Population Trapping (CPT) in Rb-87 vapor using the D-2 transition. The FLL uses frequency modulation (FM) spectroscopy and we study the effect of FM parameters (modulation frequency and index) on the sensitivity and the signal to noise ratio of the feedback signal in the FLL. The clock which employs a small spherical glass cell containing 87Rb atoms and a buffer gas, exhibits a short term stability of 3 x 10(-11)/root tau. The long term relative frequency stability of the 10 MHz output is better than 10(-10) with a drift of 10(-11) per day. (c) 2007 Optical Society of America

引用

页码：15060 / 15065

页数：6

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