[1] Yu J J, Jia Z S, Yi L et al. Optical millimeter-wave generation or up-conversion using external modulators[J]. IEEE Photonics Technology Letters, 18, 265-267(2006).

[2] Liu L M, Dong Z, Pi Y Z et al. Radio-over-fiber system for frequency-quadrupled millimeter-wave generation by external modulator[J]. Chinese Journal of Lasers, 36, 148-153(2009).

[3] Zhang Y, Liu B, Ji S. Generation of multiple-frequency optical millimeter-wave signal with optical carrier suppression and no optical filter[J]. IEEE Photonics Journal, 9, 1-7(2017).

[4] Hu Z Y, Qiu Y, Li W T et al. Experimental demonstration of direct re-modulation for an IM/DD OFDM-WDM-PON with symmetrical bi-directional transmission[J]. Optics Communications, 460, 125123(2020).

[5] Yeh C H, Chow C W, Wei L Y. Symmetric>67 Gbps OFDM-IMDD based WDM access network for mitigating Rayleigh backscattering interference noise[J]. Optics Communications, 454, 124504(2020).

[6] Yu J J, Zhou X. Ultra-high-capacity DWDM transmission system for 100G and beyond[J]. IEEE Communications Magazine, 48, S56-S64(2010).

[7] Jia Z S, Yu J J, Ellinas G et al. OThM: OThM2. D.C.: Optical Society of America(2007).

[8] Chen L, Shao Y F, Lei X Y et al. A novel radio-over-fiber system with wavelength reuse for upstream data connection[J]. IEEE Photonics Technology Letters, 19, 387-389(2007).

[9] Jia Z S, Yu J J, Boivin D et al. Bidirectional ROF links using optically up-converted DPSK for downstream and remodulated OOK for upstream[J]. IEEE Photonics Technology Letters, 19, 653-655(2007).

[10] Jia Z S, Yu J J, Chang G K. A full-duplex radio-over-fiber system based on optical carrier suppression and reuse[J]. IEEE Photonics Technology Letters, 18, 1726-1728(2006).

[11] Chen D Y, Sun W M, Qin S C et al. A fully integrated CMOS limiter and RSSI circuits for modem optical communications[J]. Journal of Optoelectronics·Laser, 18, 167-174(2007).

[12] Liu A L, Yin H X, Wu B et al. Phase-shift characteristics of radio frequency signals for radio over fiber transmission systems[J]. Acta Optica Sinica, 38, 0506003(2018).

[13] Quadrupled Vector Signal, Wavelength Reuse[J]. Chinese J. Lasers, 45, 1006005(2018).

[14] Xue Z Z, Pei L, Xie Y H et al. Filterless 24-tupling frequency millimeter-wave generator[J]. Acta Optica Sinica, 40, 1006001(2020).

[15] Kamisaka T, Kuri T, Kitayama K. Simultaneous modulation and fiber-optic transmission of 10-Gb/s baseband and 60-GHz-band radio signals on a single wavelength[J]. IEEE Transactions on Microwave Theory and Techniques, 49, 2013-2017(2001).

[16] Ikeda K, Kuri T, Kitayama K. Simultaneous three-band modulation and fiber-optic transmission of 2.5-Gb/s baseband, microwave-, and 60-GHz-band signals on a single wavelength[J]. Journal of Lightwave Technology, 21, 3194-3202(2003).

[17] Jia Z S, Yu J J, Chowdhury A et al. Simultaneous generation of independent wired and wireless services using a single modulator in millimeter-wave-band radio-over-fiber systems[J]. IEEE Photonics Technology Letters, 19, 1691-1693(2007).

[18] Zhang L, Hu X F, Cao P et al. Simultaneous generation of independent wired and 60-GHz wireless signals in an integrated WDM-PON-RoF system based on frequency-sextupling and OCS-DPSK modulation[J]. Optics Express, 20, 14648-14655(2012).

[19] Wei J, Jun C. Design of WDM-RoF-PON for wireless and wire-line access with source-free ONUs[J]. Journal of Optical Communications and Networking, 5, 127-133(2013).

[20] Xiang Y, Chen C, Zhang C F et al. Wired/wireless access integrated RoF-PON with scalable generation of multi-frequency MMWs enabled by polarization multiplexed FWM in SOA[J]. Optics Express, 21, 1218-1225(2013).

[21] Ma J X, Yu J, Yu C X et al. Fiber dispersion influence on transmission of the optical millimeter-waves generated using LN-MZM intensity modulation[J]. Journal of Lightwave Technology, 25, 3244-3256(2007).