Xiaotong Chen, Yanyi Jiang, Bo Li, Hongfu Yu, Haifeng Jiang, Tao Wang, Yuan Yao, Longsheng Ma, "Laser frequency instability of 6 × 10−16 using 10-cm-long cavities on a cubic spacer," Chin. Opt. Lett. 18, 030201 (2020)

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- Chinese Optics Letters
- Vol. 18, Issue 3, 030201 (2020)

Fig. 1. Design of transportable reference cavities. (a) The cubic cavity spacer. (b) The cavities mounted on an aluminum cage. (c) The displacement of probe points at different positions along the axis on the mirrors of cavity 1 under an acceleration of 1g along the axis. (d) The length change of two cavities under an acceleration of 1g along the axis. Three curves are overlapped.

Fig. 2. Schematic diagram of the experimental setup for (a) laser frequency stabilization and (b) laser performance measurement. AOM, acousto-optic modulator; FNC, fiber noise cancellation; P, polarizer; EOM, electro-optic modulator; Iso, optical isolator; , quarter-wave plate; PD, photo-detector; FFT, fast Fourier transform spectrum analyzer.

Fig. 3. Laser frequency instability measurement.

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