[1] Marin-Palomo P, Kemal J N, Karpov M et al. Microresonator-based solitons for massively parallel coherent optical communications[J]. Nature, 546, 274-279(2017).

[2] Hu H, da Ros F, Pu M H et al. Single-source chip-based frequency comb enabling extreme parallel data transmission[J]. Nature Photonics, 12, 469-473(2018).

[3] Torres-Company V, Schröder J, Fülöp A et al. Laser frequency combs for coherent optical communications[J]. Journal of Lightwave Technology, 37, 1663-1670(2019).

[4] Jørgensen A A, Kong D, Henriksen M R et al. Petabit-per-second data transmission using a chip-scale microcomb ring resonator source[J]. Nature Photonics, 16, 798-802(2022).

[5] Geng Y, Zhou H, Han X J et al. Coherent optical communications using coherence-cloned Kerr soliton microcombs[J]. Nature Communications, 13, 1070(2022).

[6] Liu J Q, Lucas E, Raja A S et al. Photonic microwave generation in the X- and K-band using integrated soliton microcombs[J]. Nature Photonics, 14, 486-491(2020).

[7] Li J, Vahala K. Small-sized, ultra-low phase noise photonic microwave oscillators at X-Ka bands[J]. Optica, 10, 33-34(2023).

[8] Sun S M, Wang B C, Liu K K et al. Integrated optical frequency division for microwave and mmWave generation[J]. Nature, 627, 540-545(2024).

[9] Picqué N, Hänsch T W. Frequency comb spectroscopy[J]. Nature Photonics, 13, 146-157(2019).

[10] Xu B X, Chen Z J, Hänsch T W et al. Near-ultraviolet photon-counting dual-comb spectroscopy[J]. Nature, 627, 289-294(2024).

[11] Temprana E, Myslivets E, Kuo B P P et al. Overcoming Kerr-induced capacity limit in optical fiber transmission[J]. Science, 348, 1445-1448(2015).

[12] Puttnam B J, Luis R S, Phillips I et al. 402 Tb/s GMI data-rate OESCLU-band transmission[C], Th4A3(24).

[13] Mazur M, Suh M G, Fülöp A et al. High spectral efficiency coherent superchannel transmission with soliton microcombs[J]. Journal of Lightwave Technology, 39, 4367-4373(2021).

[14] Yang K Y, Shirpurkar C, White A D et al. Multi-dimensional data transmission using inverse-designed silicon photonics and microcombs[J]. Nature Communications, 13, 7862(2022).

[15] Peccianti M, Pasquazi A, Park Y et al. Demonstration of a stable ultrafast laser based on a nonlinear microcavity[J]. Nature Communications, 3, 765(2012).

[16] Liu S T, Wu X R, Jung D et al. High-channel-count 20 GHz passively mode-locked quantum dot laser directly grown on Si with 4.1 Tbit/s transmission capacity[J]. Optica, 6, 128-134(2019).

[17] Liu J Q, Huang G H, Wang R N et al. High-yield, wafer-scale fabrication of ultralow-loss, dispersion-engineered silicon nitride photonic circuits[J]. Nature Communications, 12, 2236(2021).

[18] Xiang C, Liu J Q, Guo J et al. Laser soliton microcombs heterogeneously integrated on silicon[J]. Science, 373, 99-103(2021).

[19] Hu Y W, Yu M J, Buscaino B et al. High-efficiency and broadband on-chip electro-optic frequency comb generators[J]. Nature Photonics, 16, 679-685(2022).

[20] Yu J J, Dong Z, Zhang J W et al. Generation of coherent and frequency-locked multi-carriers using cascaded phase modulators for 10 Tb/s optical transmission system[J]. Journal of Lightwave Technology, 30, 458-465(2012).

[21] Wu R, Supradeepa V R, Long C M et al. Generation of very flat optical frequency combs from continuous-wave lasers using cascaded intensity and phase modulators driven by tailored radio frequency waveforms[J]. Optics Letters, 35, 3234-3236(2010).

[22] Xu M Y, He M B, Zhu Y T et al. Flat optical frequency comb generator based on integrated lithium niobate modulators[J]. Journal of Lightwave Technology, 40, 339-345(2022).

[23] Imran M, Anandarajah P M, Kaszubowska-Anandarajah A et al. A survey of optical carrier generation techniques for terabit capacity elastic optical networks[J]. IEEE Communications Surveys & Tutorials, 20, 211-263(2018).

[24] Zhang J W, Yu J J, Dong Z et al. Generation of full C-band coherent and frequency-lock multi-carriers by using recirculating frequency shifter loops based on phase modulator with external injection[J]. Optics Express, 19, 26370-26381(2011).

[25] Li J P, Li X, Zhang X G et al. Analysis of the stability and optimizing operation of the single-side-band modulator based on re-circulating frequency shifter used for the T-bit/s optical communication transmission[J]. Optics Express, 18, 17597-17609(2010).

[26] Myslivets E, Kuo B P P, Alic N et al. Generation of wideband frequency combs by continuous-wave seeding of multistage mixers with synthesized dispersion[J]. Optics Express, 20, 3331-3344(2012).

[27] Ataie V, Myslivets E, Kuo B P P et al. Spectrally equalized frequency comb generation in multistage parametric mixer with nonlinear pulse shaping[J]. Journal of Lightwave Technology, 32, 840-846(2014).

[28] Song M, Choi H, Choi G et al. Multi-band operation of flat-top supercontinuum laser sources with programmable repetition rate up to 50 GHz[J]. Journal of Lightwave Technology, 40, 3425-3431(2022).

[29] Cai Y J, Sohanpal R, Luo Y et al. On the design of low phase noise and flat spectrum optical parametric frequency comb[J]. APL Photonics, 8, 110802(2023).

[30] Zhang X, Zhang J H, Yin K et al. Sub-100 fs all-fiber broadband electro-optic optical frequency comb at 1.5 µm[J]. Optics Express, 28, 34761-34771(2020).

[31] Torres-Company V, Lancis J, Andrés P. Lossless equalization of frequency combs[J]. Optics Letters, 33, 1822-1824(2008).

[32] Dou Y J, Zhang H M, Yao M Y. Improvement of flatness of optical frequency comb based on nonlinear effect of intensity modulator[J]. Optics Letters, 36, 2749-2751(2011).

[33] Azaña J. Time-to-frequency conversion using a single time lens[J]. Optics Communications, 217, 205-209(2003).

[34] Doran N J, Wood D. Nonlinear-optical loop mirror[J]. Optics Letters, 13, 56-58(1988).

[35] Wu R, Torres-Company V, Leaird D E et al. Supercontinuum-based 10-GHz flat-topped optical frequency comb generation[J]. Optics Express, 21, 6045-6052(2013).

[36] Jiang Y Z, Li J, Zhu W et al. Channelized multi-frequency measurements based on sawtooth wave modulated non-flat optical frequency combs[J]. Acta Optica Sinica, 43, 2206001(2023).

[37] Agrawal G P. Nonlinear fiber optics[M]. Nonlinear science at the dawn of the 21st Century, 542, 195-211(2007).

[38] Zhang Z L, Qian W Q, Qi P F et al. Research progress in supercontinuum generation and regulation based on femtosecond laser filamentation[J]. Chinese Journal of Lasers, 50, 0708004(2023).