Polymeric electrooptic 2×2 switch consisting of bifurcationoptical active waveguides and a Mach-Zehnder interferometer

We interpret the modified bifurcation optically active waveguide switch structure for a polymeric electrooptic (EO) 2×2 switch. PEI-DR1, UFC150, and Resole HM2 were used as the core EO material, the lower clad material, and the upper clad material, respectively. We present the optical and electrical properties on this material system for high-performance devices. We fabricate the electrically and optically packaged polymeric EO 2×2 switch for high-speed optical communications. At an operating voltage of 8.5 V, the crosstalk of the cross-arm is -18.1 dB, and that of the straight arm is -18.5 dB. The measured optical loss is 14 dB at λ=1.3 μm. The 6-dB attenuation in radio-frequency transmission corresponds to about 17 GHz     

Delay‐locked loop based clock and data recovery with wide operating range and low jitter in a 65‐nm CMOS process

A delay‐locked loop (DLL) based clock and data recovery (CDR) circuit with a half‐rate clock is proposed. The CDR includes a coarse and a fine tuned block, in which the novel coarse and fine phase detectors form closed loops. It is designed in a 65‐nm complementary metal‐oxide semiconductor (CMOS) process using a 1.2‐V supply voltage. The simulation results show that it can cover a wide operating range from 500 Mbps to 8 Gbps and the corresponding peak‐to‐peak jitters are 1.63 ps and 0.96 ps, respectively. Copyright © 2016 John Wiley & Sons, Ltd.