[1] Wang Guochao, Wei Chunhua, Yan Shuhua. Wavelength selection and non-ambiguity range analysis for optical-combreferenced multi-wavelength absolute distance measurement[J]. Acta Optica Sinica, 2014, 34(4): 0412002.
[2] Yan Lulu, Zhang Yanyan, Zhao Wenyu, et al.. 186 MHz low amplitude noise erbium-doped-fiber femtosecond laser[J]. Chinese J Lasers, 2014, 41(8): 0802004.
[3] Wu Xuejian, Li Yan, Wei Haoyun, et al.. Femtosecond optical frequency combs for precision measurement applications [J]. Laser & Optoelectronics Progress, 2012, 49(3): 030001.
[4] Shi Nuannuan, Gu Yiying, Hu Jingjing, et al.. Study of the tunable optical comb filter based on Sagnac interferometer loop[J]. Acta Optica Sinica, 2014, 34(3): 0306001.
[5] Rosenband T, Hume D B, Schmidt P O, et al.. Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place[J]. Science, 2008, 319(5871): 1808-1812.
[6] Chou C W, Hume D B, Koelemeij J C J, et al.. Frequency comparison of two high-accuracy Al + optical clocks[J]. Physical Review Letters, 2010, 104(7): 070802.
[7] Marian A, Stowe M C, Lawall J R, et al.. United time-frequency spectroscopy for dynamics and global structure[J]. Science, 2004, 306(5704): 2063-2068.
[8] Marian A, Stowe M C, Felinto D, et al.. Direct frequency comb measurements of absolute optical frequencies and population transfer dynamics[J]. Physical Review Letters, 2005, 95(2): 023001.
[9] Fendel P, Bergeson S D, Udem T, et al.. Two-photon frequency comb spectroscopy of the 6 s-8 s transition in cesium [J]. Optics Letters, 2007, 32(6): 701-703.
[10] Stowe M C, Thorpe M J, Pe′ er A, et al.. Direct frequency comb spectroscopy[J]. Advances in Atomic, Molecular, and Optical Physics, 2008, 55: 1-60.
[11] Wolf A L, Van Den Berg S A, Ubachs W, et al.. Direct frequency comb spectroscopy of trapped ions[J]. Physical Review Letters, 2009, 102(22): 223901.
[12] Hansch T W. Nobel lecture: Passion for precision[J]. Reviews of Modern Physics, 2006, 78(4): 1297-1309.
[13] Diddams S A. Spectroscopy: Combs grow bigger teeth[J]. Nature Physics, 2014, 10(1): 8-9.
[14] Campbell C J, Radnaev A G, Kuzmich A, et al.. Single-ion nuclear clock for metrology at the 19th decimal place[J]. Physical Review Letters, 2012, 108(12): 120802.
[15] Ozawa A, Schneider W, Hansch T W, et al.. Phase-stable single-pass cryogenic amplifier for high repetition rate fewcycle laser pulses[J]. New Journal of Physics, 2009, 11(8): 083029.
[16] Gohle C, Udem T, Herrmann M, et al.. A frequency comb in the extreme ultraviolet[J]. Nature, 2005, 436(7048): 234-237.
[17] Morgenweg J, Barmes I, Eikema K S E. Ramsey-comb spectroscopy with intense ultrashort laser pulses[J]. Nature Physics, 2014, 10(1): 30-33.
[18] Cingoz A, Yost D C, Allison T K, et al.. Direct frequency comb spectroscopy in the extreme ultraviolet[J]. Nature, 2012, 482(7383): 68-71.
[19] Kandula D Z, Gohle C, Pinkert T J, et al.. Extreme ultraviolet frequency comb metrology[J]. Physical Review Letters, 2010, 105(6): 063001.
[20] Gomez E, Aubin S, Orozco L A, et al.. Lifetime and hyperfine splitting measurements on the 7s and 6p levels in rubidium [J]. JOSA B, 2004, 21(11): 2058-2067.
[21] Morgenweg J, Eikema K S E. Ramsey-comb spectroscopy: Theory and signal analysis[J]. Physical Review A, 2014, 89(5): 052510.
[22] Pinkert T J, Kandula D Z, Gohle C, et al.. Widely tunable extreme UV frequency comb generation[J]. Optics Letters, 2011, 36(11): 2026-2028.
[23] Herrmann M, Haas M, Jentschura U D, et al.. Feasibility of coherent xuv spectroscopy on the 1 S-2 S transition in singly ionized helium[J]. Physical Review A, 2009, 79(5): 052505.
[24] Antognini A, Nez F, Schuhmann K, et al.. Proton structure from the measurement of 2S-2P transition frequencies of muonic hydrogen[J]. Science, 2013, 339(6118): 417-420.
