[1] Quinn T J. Practical realization of the definition of the metre, including recommended radiations of other optical frequency standards (2001) [J]. Metrologia, 2003, 40(2): 103-133. doi:  10.1088/0026-1394/40/2/316
[2] Pisani M, Yacoot A, Balling P, et al. Comparison of the performance of the next generation of optical interferometers [J]. Metrologia, 2012, 49(4): 455-467. doi:  10.1088/0026-1394/49/4/455
[3] Orr B J, He Y. Rapidly swept continuous-wave cavity-ringdown spectroscopy [J]. Chemical Physics Letters, 2011, 512(1–3): 1-20.
[4] Wu S, Feng J, Li C, et al. The results of CCM.G-K2.2017 key comparison [J]. Metrologia, 2020, 57(1A): 07002. doi:  10.1088/0026-1394/57/1A/07002
[5] Michael M, Petr B, Petr K, et al. The CCL-K11 ongoing key comparison: final report for the year 2010 [J]. Metrologia, 2011, 48(1A): 04001. doi:  10.1088/0026-1394/48/1A/04001
[6] Didier A, Ignatovich S, Benkler E, et al. 946-nm Nd:YAG digital-locked laser at 1.1×10−16 in 1 s and transfer-locked to a cryogenic silicon cavity [J]. Optics Letters, 2019, 44(7): 1781-1784. doi:  10.1364/OL.44.001781
[7] Morzynski P, Wcislo P, Ablewski P, et al. Absolute frequency measurement of rubidium 5S-7S two-photon transitions [J]. Optics Letters, 2013, 38(22): 4581-4584. doi:  10.1364/OL.38.004581
[8] Petru F, Popela B, Vesela Z. Design and performance of compact iodine stabilized He-Ne lasers at lambda =633 nm with a short optical resonator [J]. Measurement Science and Technology, 1993, 4(4): 506. doi:  10.1088/0957-0233/4/4/012
[9] Chartier J M, Labot J, Sasagawa G, et al. A portable iodine stabilized He-Ne laser and its use in an absolute gravimeter [J]. Instrumentation and Measurement, IEEE Transactions on, 1993, 42(2): 420-422. doi:  10.1109/19.278595
[10] Ishikawa J. Portable national length standards designed and constructed using commercially available parts: An advanced mechanical design for the iodine stabilized He-Ne laser [J]. Synthesiology (English Edition), 2010, 2(4): 246-257.
[11] Qian J, Liu Z Y, Zhang X P, et al. A new type of iodne stabilized He-Ne laser at 633 nm [J]. Acta Metrologica Sinica, 2008, 29(1): 10-13. (in Chinese)
[12] Tian W, Zhang W M, Qian J, et al. Test result of the NIM frequency stabilized laser on the FG5-112 absolute gravimeter [J]. Journal of Geodesy and Geodynamics, 2015, 35(6): 1057-1059.
[13] Wallard A J. Frequency stabilization of the helium-neon laser by saturated absorption in iodine vapour [J]. Journal of Physics E: Scientific Instruments, 1972, 5(9): 926-930. doi:  10.1088/0022-3735/5/9/025