Ultra-fast speed, low grating lobe optical beam steering using unequally spaced phased array technique

In this paper, we present a low grating lobe optical beam steering technique using unequally spaced phased array, in which the required spacings among phase elements are quantitatively analyzed so that the grating lobe can be minimized by the destructive interference from these unequally spaced phase elements. The large grating lobe is one of the major drawbacks of optical phased array technology, which limits the light efficiency and quality of the light beam. Thus, the low grating lobe technique presented in this paper could substantially improve the light efficiency and the quality of light beam, which may play an important role in a variety of applications such as fast speed ladar beam steering, large size high resolution display, and wide bandwidth free space optics communications.

[1]  R. Meyer.  Optical beam steering using a multichannel lithium tantalate crystal. , 1972, Applied optics.

[2]  Y. Ninomiya,et al.  Ultrahigh resolving electrooptic prism array light deflectors , 1973 .

[3]  George O. Reynolds,et al.  Physical optics notebook: Tutorials in Fourier optics , 1989 .

[4]  Kenichi Iga,et al.  Optical Beam Scanner with Phase-Variable Semiconductor Waveguides , 1990 .

[5]  Eli Brookner.  Practical Phased Array Antenna Systems , 1991 .

[6]  F. Vasey,et al.  Spatial optical beam steerin with an AlGaAs integrated phased array. , 1993, Applied optics.

[7]  Edward A. Watson,et al.  Optical phased array technology , 1996, Proc. IEEE.

[8]  David M. Rowe,et al.  Developments in holographic-based scanner designs , 1997, Optics & Photonics.

[9]  Nicholas Fourikis,et al.  Phased array-based systems and applications , 1997 .

[10]  Edward A. Watson,et al.  Optical beam steering using surface micromachined gratings and optical phased arrays , 1997, Optics & Photonics.

[11]  Volker Guyenot,et al.  Design of a fast and high-precision polygonal scanner for HDTV , 1997, Optics & Photonics.

[12]  Brian Robertson,et al.  Adaptive beam steering implemented in a ferroelectric liquid-crystal spatial-light-modulator free-space, fiber-optic switch. , 2002, Applied optics.

[13]  Paul B. Ruffin.  Optical MEMS-based arrays , 2003, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[14]  D. C. Jones,et al.  Beam steering of a fiber-bundle laser output using phased array techniques , 2004, SPIE LASE.