The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Conditional artificial dielectric : optically controlled microwave modulator
Author:	Jimenez, J. Manuel
View Online:	njit-etd1992-082 (xii, 105 pages ~ 3.4 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Electrical Engineering
Document Type:	Thesis
Advisory Committee:	Grebel, Haim (Committee chair) Hensel, John Charles (Committee member) Gordon, Eugene I. (Committee member)
Date:	1992-01
Keywords:	Dielectric devices Modulators (Electronics) Microwave optics
Availability:	Unrestricted
Abstract:	A conditional artificial dielectric with embeddings of either CdS, GaAs or Si in PMMA form the dielectric material of a microstrip in a homodyne microwave detection system. The system consists of a Michelson or Mach-Zehnder interferometers with the microstrip placed in one arm. The index of refraction of the microstrip substrate is modulated by chopped incident light causing amplitude and phase variations in the incoming RF signal. Those variations are detected by mixing the light modulated microwave carrier(information channel) with the unmodulated carrier (reference channel) in the interferometer. The output is sensed by the square law detector and a lock-in amplifier synchronized with the light modulating frequency.