Abstract
A photonics true-time-delay system for phased array antenna beam steering employing a novel tunable chirped fiber grating delay line and a multi-wavelength erbium-doped fiber ring laser source based on a sampled grating filter is proposed. The tunable chirped fiber grating, which act as a continuous time-delay element, is achieved by bending a uniform fiber Bragg grating bonded at a slant onto the lateral surface of a simply supported beam. This technique allows the dynamic control of the chirp rate and spectral width of the grating without center wavelength shift. By adjusting the chirp rate of the fiber grating via bend strain, this kind of tunable chirped fiber grating could achieve very low and adjustable delay times, therefore provides higher angle resolution for scanning microwave beam, even the wavelengths of laser source are fixed and un-tunable. The true-time-delay system using proposed tunable chirped fiber grating delay element and sampled grating based laser source is constructed and demonstrated experimentally.
Similar content being viewed by others
References
H. Zmuda, R.A. Soref, P. Payson, S. Johns, E.N. Toughlian, ‘Photonic beamformer for phased array antennas using a fiber grating prism,’ IEEE Photonics Technology Letters, vol. 9,No. 2, pp. 241–243, 1997
J.L. Yang, K.J. Zhou, Y.Q. Liu and S.C. Tjin, ‘Photonics True-Time-Delay Unit for Phased-Array Antenna Using Multiwavelength Fiber Laser Based on a Sagnac Interferemetric Filter’, International Journal of Infrared and Millimeter Waves, Vol.23, No.6, 2002.
J.L. Yang, Y.Q. Liu and J.P. Yao, ‘Wideband true-time-delay system using fiber Bragg grating prism incorporated with a wavelength tunable fiber laser source’, Proceedings of IEEE, Microwave Photonics MWP2001, pp.125–128, Long Beach, California, USA.
R. A. Soref, ‘Fiber grating prism for true time delay beamsteering’, Fiber and Integrated Optics, vol. 15, pp. 325–333, 1996.
J. L. Cruz, B. Ortega, M. V. Andres, B. Gimeno, D. Pastor, J. Capmany and L. Dong, ‘Chirped fiber Bragg gratings for phased array antennas’, Electron. Lett., Vol. 33, pp. 545–546, 1997.
J.L Corral, J. Marti, J.M. Fuster, R.I. Laming, ‘True time-delay scheme for feeding optically controlled phased-array antennas using chirped-fiber gratings," IEEE Photonics Technology Letters, Vol. 9, pp. 1529–1531, 1997
P. C. Hill and B. J. Eggleton, ‘Strain gradient chirp of fibre Bragg grating’, Electron. Lett., Vol.30, pp. 1172–1174, 1994.
M. Le Blanc, S. Y. Huang, M. M. Ohn and R. M. Measures, ‘Tunable Chirping of a fibre Bragg grating using a tapered cantilever beam bed’, Electron. Lett., Vol.30, pp. 2163–2165, 1994.
T. Imai, T. Komukai and M. Nakazawa, ‘Dispersion tuning of a linear chirped fiber Bragg grating without a center wavelength shift by applying a strain gradient’, IEEE Photon. Technol. Lett., Vol.10, pp. 845–847, 1998.
N.R. Bauld, ‘Mechanics of materials’, Second edition, p. 411–479, PWS Publishers, Boston, 1986.
Rights and permissions
About this article
Cite this article
Yang, J., Liu, Y., Tjin, S. et al. Continuous True-Time-Delay System Employing a Novel Tunable Chirped Fiber Grating Delay Line and a Sampled Grating Based Multiwavelength Fiber Laser. International Journal of Infrared and Millimeter Waves 23, 1241–1250 (2002). https://doi.org/10.1023/A:1019667810485
Issue Date:
DOI: https://doi.org/10.1023/A:1019667810485