Abstract
Photonic true-time delay (TTD) beamforming1–5 has been considered a promising technique for future wideband phased array antenna systems and has been intensively studied recently. An efficient way to achieve TTD beamforming is to use a fiber-grating prism. There are two types of fiber-grating prisms: the one uses discrete fiber Bragg gratings (FBGs)1 and the one uses a chirped grating.4 Discrete FBG-based TTD system can usually work at microwave frequencies less than 3 GHz4 with discrete beam scanning. To achieve continuous beam steering at higher microwave frequencies, chirped grating based TTD beamforming system is usually used.5 The diffi-culty employing chirped grating based system is that one needs to provide a multi-wavelength source in which the wavelengths should be tuned with an equally increased or decreased wavelength spacing. To achieve this, multiple tunable laser sources with the wavelengths controlled by a programmable wavelength controller should be used. Obviously, this makes the whole TTD system bulky and expensive. To solve this problem, in this paper we propose to use a new multiwave-length tunable laser source that can generate mul-tiwavelength lasing with equally increased or decreased wavelength spacing.
© 2002 Optical Society of America
PDF ArticleMore Like This
Gab-Yong Lee, Yeon-Bong Choi, Jong-Dug Shin, and Boo-Gyoun Kim
ThGG90 Optical Fiber Communication Conference (OFC) 2002
Young-Geun Han, Xinyong Dong, Ju Han Lee, Kwanil Lee, and Sang Bae Lee
OThF5 Optical Fiber Communication Conference (OFC) 2008
N. Pleros, C. Bintjas, G. Theophilopoulos, M. Kalyvas, S. Sygletos, and H. Avramopoulos
WJ2 Optical Fiber Communication Conference (OFC) 2002