Premium
Optically controlled microwave phase shifter using Mach–Zehnder interferometer geometry
Author(s) -
Shevgaonkar Sarita R.,
Chandorkar A. N.,
Sharma D. K.
Publication year - 2000
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/1098-2760(20010105)28:1<15::aid-mop5>3.0.co;2-x
Subject(s) - phase shift module , interferometry , mach–zehnder interferometer , microwave , microstrip , phase (matter) , optics , materials science , substrate (aquarium) , optoelectronics , insertion loss , physics , oceanography , quantum mechanics , geology
A new type of optically controlled microwave phase shifter is proposed here. The phase shifter employs the Mach–Zehnder interferometer in a microstrip form on a semiconducting substrate. One of the arms of the interferometer has an optically excited gap. The gap is modeled by a variable series impedance. A general analysis of the phase shifter is presented. Results show that the phase shifter can be realized at microwave frequencies on silicon substrate, and phase shifts from 0 to 90° can be obtained with optical power less than 100 mW. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 28: 15–21, 2001.