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Optical Engineering

698-nm diode laser with 1-Hz linewidth
Author(s): Long Chen; Linbo Zhang; Guanjun Xu; Jun Liu; Ruifang Dong; Tao Liu
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Paper Abstract

Two diode lasers at 698 nm are separately locked to two independent optical reference cavities with a finesse of about 128,000 by the Pound–Drever–Hall method. The more accurate coefficient between voltage and frequency of the error signal is measured, with which quantitative evaluation of the effect of many noises on the frequency stability can be made much more conveniently. A temperature-insensitive method is taken to reduce the effect of residual amplitude modulation on laser frequency stability. With an active fiber noise cancellation, the optical heterodyne beat between two independent lasers shows that the linewidth of one diode laser reaches 1 Hz. The fractional Allan deviation removed linear frequency shift less than 30    mHz / s is below 2.6 × 10 15 with 1- to 100-s average time.

Paper Details

Date Published: 5 January 2017
PDF: 5 pages
Opt. Eng. 56(1) 016101 doi: 10.1117/1.OE.56.1.016101
Published in: Optical Engineering Volume 56, Issue 1
Show Author Affiliations
Long Chen, National Time Service Ctr. (China)
Linbo Zhang, National Time Service Ctr. (China)
Guanjun Xu, National Time Service Ctr. (China)
Jun Liu, National Time Service Ctr. (China)
Univ. of Chinese Academy of Sciences (China)
Ruifang Dong, National Time Service Ctr. (China)
Tao Liu, National Time Service Ctr. (China)

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