[1] Prasad R. Overview of wireless personal communications: microwave perspectives[J]. IEEE Communications Magazine, 35, 104-108(1997).

[2] Peng Z Y, Li C Z. Portable microwave radar systems for short-range localization and life tracking: a review[J]. Sensors, 19, 1136-1155(2019).

[3] Plant W J, Keller W C, Hayes K. Measurement of river surface currents with coherent microwave systems[J]. IEEE Transactions on Geoscience and Remote Sensing, 43, 1242-1257(2005).

[4] Jiang Y, Yu J L, Wang Y T et al. An optical domain combined dual-loop optoelectronic oscillator[J]. IEEE Photonics Technology Letters, 19, 807-809(2007).

[5] Jia S, Yu J L, Wang J et al. A novel optoelectronic oscillator based on wavelength multiplexing[J]. IEEE Photonics Technology Letters, 27, 213-216(2015).

[6] Jiang Y, Yu J L, Wang Y T et al. A novel scheme of dual-loop optoelectronic oscillator[J]. Acta Optica Sinica, 27, 919-922(2007).

[7] Dahan D, Shumakher E, Eisenstein G. Self-starting ultralow-jitter pulse source based on coupled optoelectronic oscillators with an intracavity fiber parametric amplifier[J]. Optics Letters, 30, 1623-1625(2005).

[8] Williams C, Davila-Rodriguez J, Mandridis D et al. Noise characterization of an injection-locked COEO with long-term stabilization[J]. Journal of Lightwave Technology, 29, 2906-2912(2011).

[9] Liu J L, Li X Q, Dai J et al. On-key coupled photoelectric oscillator based on non-polarization maintaining fiber ring cavity[J]. Chinese Journal of Lasers, 49, 1815001(2022).

[10] Okusaga O, Adles E J, Levy E C et al. Spurious mode reduction in dual injection-locked optoelectronic oscillators[J]. Optics Express, 19, 5839-5854(2011).

[11] Lee K H, Kim J Y, Choi W Y. Injection-locked hybrid optoelectronic oscillators for single-mode oscillation[J]. IEEE Photonics Technology Letters, 20, 1645-1647(2008).

[12] Li Y D, Pu T, Gu Y et al. Construction of wide tuning integrable photoelectric oscillator based on directly modulated light signal injection into semiconductor laser[J]. Acta Optica Sinica, 42, 1323003(2022).

[13] Zhang J J, Yao J P. Parity-time-symmetric optoelectronic oscillator[J]. Science Advances, 4, eaar6782(2018).

[14] Fan Z Q, Zhang W F, Qiu Q et al. Hybrid frequency-tunable parity-time symmetric optoelectronic oscillator[J]. Journal of Lightwave Technology, 38, 2127-2133(2020).

[15] Teng C H, Zou X H, Li P X et al. Fine tunable PT-symmetric optoelectronic oscillator based on laser wavelength tuning[J]. IEEE Photonics Technology Letters, 32, 47-50(2020).

[16] Yao X S, Maleki L. Dual microwave and optical oscillator[J]. Optics Letters, 22, 1867-1869(1997).

[17] Zhou W M, Blasche G. Injection-locked dual opto-electronic oscillator with ultra-low phase noise and ultra-low spurious level[J]. IEEE Transactions on Microwave Theory and Techniques, 53, 929-933(2005).

[18] Liu Y Z, Hao T F, Li W et al. Observation of parity-time symmetry in microwave photonics[J]. Light: Science & Applications, 7, 38-47(2018).

[19] Hao T F, Cen Q Z, Dai Y T et al. Breaking the limitation of mode building time in an optoelectronic oscillator[J]. Nature Communications, 9, 1839(2018).

[20] Hao T F, Cen Q Z, Guan S H et al. Optoelectronic parametric oscillator[J]. Light: Science & Applications, 9, 102-112(2020).

[21] Romeira B, Kong F Q, Figueiredo J M L et al. High-speed spiking and bursting oscillations in a long-delayed broadband optoelectronic oscillator[J]. Journal of Lightwave Technology, 33, 503-510(2015).

[22] Ge Z T, Hao T F, Capmany J et al. Broadband random optoelectronic oscillator[J]. Nature Communications, 11, 5724(2020).

[23] Ge Z T, Xiao Y, Hao T F et al. Tb/s fast random bit generation based on a broadband random optoelectronic oscillator[J]. IEEE Photonics Technology Letters, 33, 1223-1226(2021).