[1] Kamatani O, Kawanishi S. Ultrahigh-speed clock recovery with phase lock loop based on four-wave mixing in a traveling-wave laser diode amplifier. Journal of Lightwave Technology, 1996, 14(8):1757-1767

[2] Hansen Mulvad H C, Tangdiongga E, de Waardt H, Dorren H J S. 40 GHz clock recovery from 640-Gbit/s OTDM signal using SOA-based phase comparator. Electronics Letters, 2008, 44(2): 146-147

[3] Oxenl we L K, Gomez-Agis F,Ware C, Kurimura S, Mulvad H C H, Galili M, Kitamura K, Nakajima H, Ichikawa J, Erasme D, Clausen A T, Jeppesen P. 640 Gbit/s clock recovery using periodically poled lithium niobate. Electronics Letters, 2008, 44(5): 370-371

[4] Boerner C, Marembert V, Ferber S, Schubert C, Schmidt-Langhorst C, Ludwig R, Weber H G. 320 Gbit/s clock recovery with electrooptical PLL using a bidirectionally operated electroabsorption modulator as phase comparator. In: Optical Fiber Communication Conference, OSA Technical Digest Series. 1996, 2: 349-351

[5] Qi G, Yao J, Seregelyi J, Paquet S, Belisle C. Optical generation and distribution of continuously tunable millimeter-wave signals using an optical phase modulator. Journal of Lightwave Technology, 2005, 23(9): 2687-2695