A novel scheme is proposed to transform an ultra-short optical pulse to a millimeter-wave frequency-modulated pulse by using the cascaded all-pass cavities (APCs). The envelope waveform of the generated pulse train is calculated, showing effective improvement by APC cascading. The extinction ratio is analyzed with different input pulses, different cavity refectivities, and different cascading numbers. It is shown that the cascading does not introduce much effect on the extinction ratio. Two designs by using Gires-Tournois cavity and waveguide ring resonators are proposed to realize the cascaded APC.
© 2010 Chinese Optics Letters
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(350.4010) Other areas of optics : Microwaves
Qinfeng Xu, Qing Ye, Zhengqing Pan, Zujie Fang, Haiwen Cai, and Ronghui Qu, "Generation of millimeter-wave sub-carrier optical pulse by using cascaded all-pass cavities," Chin. Opt. Lett. 8, 7-10 (2010)