[1] T NAASUMA, G DUCOURNAU, RNAUDC . Advances in terahertz communications accelerated by photonics. Nature Photonics, 10, 371-379(2016).

[2] P I ABRAMOV, A S BUDARIN, E V KUZNETSOV et al. Quantum-cascade lasers in atmospheric optical communication lines: challenges and prospects (review). Journal of Applied Spectroscopy, 87, 579-600(2020).

[3] T UDEM. Optical frequency metrology. Nature, 416, 233-237(2016).

[4] Xiaoyu LIAO, Juncheng CAO, Hua LI. Research progress of terahertz semiconductor optical frequency combs. Acta Physica Sinica, 69, 189501(2020).

[5] S H LEE, J M KANG, I H CHOI et al. Linearization of DFB laser diode by external light-injected cross-gain modulation for radio-over-fiber link. IEEE Photonics Technology Letters, 18, 1545-1547(2006).

[6] S BARBIERI, W MAINEULT, S S DHILLON et al. 13 GHz direct modulation of terahertz quantum cascade lasers. Applied Physics Letters, 91, 143510(2007).

[7] P GELLIE, S BARBIERI, J F LAMPIN et al. Injection-locking of terahertz quantum cascade lasers up to 35 GHz via RF amplitude modulation. Optics Express, 18, 20799-20816(2010).

[8] L GU, W WAN, Y ZHU et al. High frequency modulation and injection locking of terahertz quantum cascade lasers. Journal of Optics, 19, 065706(2017).

[9] W WAN, H LI, T ZHOU et al. Homogeneous spectral spanning of terahertz semiconductor lasers with radio frequency modulation. Scientific Reports, 7, 44109(2017).

[10] Z LI, H LI. Sideband generation of coupled-cavity terahertz semiconductor lasers under active radio frequency modulation. Optics Express, 26, 32675-32690(2018).

[11] M DAVID, M DAVID. 微波工程. 张肇仪,周乐柱,吴德明, 译(2006).

     . Microwave engineering. ZHANG Zhaoyi, ZHOU Lezhu, WU Deming, transl(2006).

[12] T LI, D LI, P QIN et al. A novel miniaturized strong-coupled FSS structure with excellent angular stability. IEEE Transactions on Electromagnetic Compatibility, 69, 8470-8478(2020).

[13] Hua LI, Kang ZHOU, Juncheng CAO. A terahertz quantum cascade laser with active region structure and wide band gain.

[14] W GUAN, Z LI, K ZHOU et al. Repetition frequency locking of a terahertz quantum cascade laser emitting at 4.2 THz. Terahertz Science and Technology, 13, 32-40(2020).

[15] C WANG, Z LI, X LIAO et al. Improved comb and dual-comb operation of terahertz quantum cascade lasers utilizing a symmetric thermal dissipation. Optics Express, 29, 433938(2021).

[16] Y ZHAO, Z LI, K ZHOU et al. Active stabilization of terahertz semiconductor dual-comb laser sources employing a phase locking technique. Laser Photonics Reviews, 15, 200498(2021).

[17] H LI, Z LI, W WAN et al. Toward compact and real-time terahertz dual-comb spectroscopy employing a self-detection scheme. ACS Photonics, 7, 49-56(2020).

[18] K ZHOU, H LI, W J WAN et al. ridge width effect on comb operation of terahertz quantum cascade lasers. Applied Physics Letters, 114, 191106(2019).