698-nm diode laser with 1-Hz linewidth

Long Chen; Linbo Zhang; Guanjun Xu; Jun Liu; Ruifang Dong; Tao Liu

doi:10.1117/1.OE.56.1.016101

5 January 2017 698-nm diode laser with 1-Hz linewidth

Long Chen, Linbo Zhang, Guanjun Xu, Jun Liu, Ruifang Dong, Tao Liu

Author Affiliations +

Optical Engineering, Vol. 56, Issue 1, 016101 (January 2017). https://doi.org/10.1117/1.OE.56.1.016101

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.

Citation Download Citation

Long Chen, Linbo Zhang, Guanjun Xu, Jun Liu, Ruifang Dong, and Tao Liu "698-nm diode laser with 1-Hz linewidth," Optical Engineering 56(1), 016101 (5 January 2017). https://doi.org/10.1117/1.OE.56.1.016101

Received: 13 September 2016; Accepted: 9 December 2016; Published: 5 January 2017

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