An Optical Waveguide with High Birefringence and Birefringence Dispersion for Optical Beamforming Network in Multibeam Array Antenna

Weiwei HU  Keizo INAGAKI  Takashi OHIRA  

IEICE TRANSACTIONS on Communications   Vol.E84-B   No.7   pp.1801-1807
Publication Date: 2001/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
Category: Beamformer Techniques
Ti:LiNbO3 optical waveguide,  birefringence,  optical beamforming network,  multibeam phase array antenna,  

Full Text: PDF>>
Buy this Article

In this paper, we report on our recent work in designing and developing an optical waveguide and optical integrated circuit for optical BFN in adaptive multibeam array antenna. We introduce a new integrated Ti:LiNbO3 waveguide and prove that it is able to yield large birefringence and birefringence dispersion. We present a new technique using a microwave-modulated optical wave to measure the birefringence in integrated Ti:LiNbO3 optical waveguides. The measuring results show that the new waveguide has a birefringence of 0.08 and birefringence dispersion of 0.05 µm-1 at optical wavelength of 1.55 µm. When the new Ti:LiNbO3 is applied to form a integrated optical waveguide array in optical beamforming network, it is shown that microwave phase shifts within the range of [-180, +180] is achieved by tuning the optical wavelength 10 nm around 1.55 µm.