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Electrically tunable photonic microwave true‐time delay based on an asymmetrically tapered chirped fiber Bragg grating
Author(s) -
Lee SangShin,
Chae HoDong
Publication year - 2005
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/mop.21056
Subject(s) - fiber bragg grating , true time delay , materials science , optics , microwave , cladding (metalworking) , grating , optoelectronics , resistive touchscreen , optical fiber , group delay and phase delay , long period fiber grating , photonics , wavelength , fiber optic sensor , dispersion shifted fiber , physics , telecommunications , electrical engineering , engineering , bandwidth (computing) , phased array , antenna (radio) , metallurgy
A photonic microwave true‐time delay utilizing an asymmetrically tapered chirped fiber Bragg grating whose cladding is partially side‐polished is proposed and demonstrated. A resistive heating electrode is incorporated on top of the tapered fiber in order to control the time delay continuously without any mechanical perturbation and moving, while requiring only a single‐wavelength light. The time delay was obtained by adjusting the reflection positions of the optical signal carrying the microwave signal from within the chirped grating via the thermo‐optic effect. The achieved time delay was ∼120 ps for the control voltage of 5 V. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 578–579, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21056