[1] Hinkley N, Sherman J A, Phillips N B, et al. An atomic clock with 10-18 instability［J］. Science, 2013, 341(6151): 1215-1218.

[2] Bloom B J, Nicholson T L, Williams J R, et al. An optical lattice clock with accuracy and stability at the 10-18 level［J］. Nature, 2014, 506(7486): 71-75.

[3] Huntemann N, Sanner C, Lipphardt B, et al. Single-ion atomic clock with 3×10-18 systematic uncertainty［J］. Physical Review Letters, 2016, 116(6): 063001.

[4] Nicholson T L, Campbell S L, Hutson R B, et al. Systematic evaluation of an atomic clock at 2×10-18 total uncertainty［J］. Nature Communications, 2015, 6: 6896.

[5] Jiang Y Y, Ludlow A D, Lemke N D, et al. Making optical atomic clocks more stable with 10-16 level laser stabilization［J］. Nature Photonics, 2011, 5(3): 158-161.

[6] Kessler T, Hagemann C, Grebing C, et al. A sub-40-mHz-linewidth laser based on a silicon single-crystal optical cavity［J］. Nature Photonics, 2012, 6(10): 687-692.

[7] Hfner S, Falke S, Grebing C, et al. 8×10-17 fractional laser frequency instability with a long room-temperature cavity［J］. Optics Letters, 2015, 40(9): 2112-2115.

[8] 蒋燕义. 超窄线宽激光及其在光钟中的应用［D］. 上海: 华东师范大学, 2012.

    Jiang Yanyi. Narrow linewidth lasers: Application to optical clocks［D］. Shanghai: East China Normal University, 2012.

[9] 林百科, 曹士英, 赵 阳, 等. 小型化碘稳频532 nm固体激光器［J］. 中国激光, 2014, 41(9): 0902002.

    Lin Baike, Cao Shiying, Zhao Yang, et al. A compact iodine-stabilized solid-state laser at 532 nm［J］. Chinese J Lasers, 2014, 41(9): 0902002.

[10] 范夏雷, 金尚忠, 张 枢, 等. 多频率合成主动抑制激光稳频的剩余幅度调制［J］. 中国激光, 2016, 43(4): 0402001.

    Fan Xialei, Jin Shangzhong, Zhang Shu, et al. Active suppression of residual amplitude modulation in laser frequency stabilization by multi-frequency mixing［J］. Chinese J Lasers, 2016, 43(4): 0402001.

[11] Foreman S M, Ludlow A D, de Miranda M H G, et al. Coherent optical phase transfer over a 32-km fiber with 1 s instability at 10-17［J］. Physical Review Letters, 2007, 99(15): 153601.

[12] Droste S, Ozimek F, Udem T, et al. Optical-frequency transfer over a single-span 1840 km fiber link［J］. Physical Review Letters, 2013, 111(11): 110801.

[13] Ma L S, Jungner P, Ye J, et al. Delivering the same optical frequency at two places: Accurate cancellation of phase noise introduced by an optical fiber or other time-varying path［J］. Optics Letters, 1994, 19(21): 1777-1779.

[14] Jiang H, Kéfélian F, Crane S, et al. Long-distance frequency transfer over an urban fiber link using optical phase stabilization［J］. Journal of the Optical Society of America B, 2008, 25(12): 2029-2035.

[15] Ma C Q, Wu L F, Jiang Y Y, et al. Optical coherence transfer over 50-km spooled fiber with frequency instability of 2×10-17 at 1 s［J］. Chinese Physics B, 2015, 24(8): 084209.

[16] 徐永存. 光纤相位噪声对传输窄线宽激光的影响及抑制技术的研究［D］. 上海: 华东师范大学, 2009: 10-11.

    Xu Yongcun. The influence of optical fiber phase noise on transmission of narrow-linewidth laser and the technique of phase noise cancellation［D］. Shanghai: East China Normal University, 2009: 10-11.

[17] Li Y, Lin Y G, Zhao Y, et al. Stable narrow linewidth 689 nm diode laser for the second stage cooling and trapping of strontium atoms［J］. Chinese Physics Letters, 2010, 27(7): 074208.