10 Ghz Optical Modulator using CPS structure for communication and Sensing

Abstract

The combination of of wireless millimeter-wave (MMW) bands and fiber optic cables is able to compensate the propagation loss of millimeter waves in broadband communications and high-resolution imaging. This paper discusses the design and the realization of optical modulator using coplanar stripline (CPS) structure completed with the u-slot antenna patch for RF signal input. The substrate used for CPS structure is Lithium Niobat (LiNbO3) due to its large electro optical coefficient. A 10 Ghz radio wave frequency is inputted via microstrip u-slot antenna patch array 2 x 1 with input impedance 50 Ω, and acceptable return loss -10 dB. The light waves for the carrier are generated from the laser diode. Several measurements have been completely done and reported. The design is carried out by means of varying physical variable value which results in specification of the operating frequency 10 GHz. This is a pure research since the obtained results are not directly applied to the radio-over-fiber (RoF) technology.

Terahertz Power Divider Using Symmetric CPS Transmission Line on a Thin Membrane

“…The main advantages of using the membrane platform introduced in [1] are bandwidth (up to at least 1.5 THz), fabrication precision, compatibility with conventional photolithographic fabrication, low loss, and low pulse dispersion. The balanced CPS transmission line is desirable for many TSoC designs [46]- [48]. Moreover, the CPS transmission line is appropriate for designing and combining different TSoC components (such as power dividers, couplers, filters, chokes, stubs, etc.)…”