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Type: Conference paper
Title: Operating atomic fountain clock using robust DBR laser system
Author: Lee, S.
Heo, M.
Kwon, T.
Hong, H.
Lee, S.
Hartnett, J.
Park, S.
Citation: Conference on Precision Electromagnetic Measurements, 2016, pp.1-2
Publisher: IEEE
Issue Date: 2016
ISBN: 9781467391344
ISSN: 0589-1485
Conference Name: Conference on Precision Electromagnetic Measurements (CPEM) (10 Jul 2016 - 15 Jul 2016 : Ottawa, Canada)
Statement of
Sangmin Lee, Myoung-Sun Heo, Taeg Yong Kwon, Hyun-Gue Hong, Sang-Bum Lee, John G. Hartnett, and Sang Eon Park
Abstract: We operate an atomic fountain clock KRISS-F1 using a laser system based on a DBR (Distributed Bragg Reflector) laser. We have found that there is no major difference in the fountain performance between laser systems with an ECDL (Extended-Cavity Diode Laser) and the DBR laser, even though spectral properties of the DBR is worse than that of ECDL. Moreover, quantum projection-noise limited stability is observed using DBR lasers. After replacing the ECDL to the DBR laser, laser system of the fountain clock became robust against acoustic and vibration noise mainly from mechanical shutters. Therefore, currently KRISS-F1 can be operated without failure of laser locking.
Keywords: Fountain clock; Primary standard; Cesium; DBR laser; ECDL; Quantum projection noise
Rights: ©2016 IEEE
DOI: 10.1109/CPEM.2016.7540697
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