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Applied Physics B

, 124:153 | Cite as

Suppression of residual amplitude modulation effects in Pound–Drever–Hall locking

  • Xiaohui Shi
  • Jie Zhang
  • Xiaoyi Zeng
  • Xiaolong Lü
  • Kui Liu
  • Jing Xi
  • Yanxia Ye
  • Zehuang Lu
Article

Abstract

Residual amplitude modulation (RAM) effects in Pound–Drever–Hall (PDH) locking are analyzed in this paper. The suppression of the RAM effect in PDH locking has been investigated by many groups, but the effect of cavity response has not been fully considered. Frequency shifts caused by RAM in PDH locking are found to be both related to the amplitude of the RAM and to the cavity’s mode matching and impedance matching. We measure the RAM-to-frequency conversion coefficients at different coupling efficiencies. The result agrees well with our theoretical model. According to our analysis, the RAM effect in principle can be fully suppressed by choosing proper impedance-matching parameters and mode coupling efficiency, and we give several examples to demonstrate the potential of full suppression of the RAM effect through proper design of cavities.

Notes

Acknowledgements

We thank Prof. Zhongkun Hu and Prof. Minkang Zhou for the help of laser phase locking. The project is partially supported by the National Key R&D Program of China (Grant No. 2017YFA0304400) and the National Natural Science Foundation of China (Grant Nos. 91536116, 91336213, and 11774108).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, School of PhysicsHuazhong University of Science and TechnologyWuhanPeople’s Republic of China

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