Optical phased array technology

@article{citeulike:2762106, abstract = {Optical phased arrays represent an enabling new technology that makes possible simple affordable, lightweight, optical sensors offering very precise stabilization, random-access pointing programmable multiple simultaneous beams, a dynamic focus/defocus capability, and moderate to excellent optical power handling capability. These new arrays steer or otherwise operate on an already formed beam. A phase profile is imposed on an optical beam as it is either transmitted through or reflected from the phase shifter array. The imposed phase profile steers, focuses, fans out, or corrects phase aberrations on the beam. The array of optical phase shifters is realized through lithographic patterning of an electrical addressing network on the superstrate of a liquid crystal waveplate. Refractive index changes sufficiently large to realize full-wave differential phase shifts can be effected using low (\<10 V) voltages applied to the liquid crystal phase plate electrodes. High efficiency large-angle steering with phased arrays requires phase shifter spacing on the order of a wavelength or less; consequently addressing issues make 1-D optical arrays much more practical than 2-D arrays. Orthogonal oriented 1-D phased arrays are used to deflect a beam in both dimensions. Optical phased arrays with apertures on the order of 4 cm by 4 cm have been fabricated for steering green, red, 1.06 \μm, and 10.6 \μm radiation. System concepts that include a passive acquisition sensor as well as a laser radar are presented}, author = {Mcmanamon, P. F. and Dorschner, T. A. and Corkum, D. L. and Friedman, L. J. and Hobbs, D. S. and Holz, M. and Liberman, S. and Nguyen, H. Q. and Resler, D. P. and Resler, D. P. and Sharp, R. C. and A10 and Watson, E. A. and A11}, booktitle = {Proceedings of the IEEE}, citeulike-article-id = {2762106}, doi = {10.1109/5.482231}, journal = {Proceedings of the IEEE}, keywords = {array, optical, phased}, number = {2}, pages = {268--298}, posted-at = {2008-05-06 18:21:28}, priority = {2}, title = {Optical phased array technology}, url = {http://dx.doi.org/10.1109/5.482231}, volume = {84}, year = {1996} }

TY - JOUR ID - citeulike:2762106 L3 - citeulike-article-id:2762106 TI - Optical phased array technology T2 - Proceedings of the IEEE JF - Proceedings of the IEEE VL - 84 IS - 2 SP - 268 EP - 298 N2 - Optical phased arrays represent an enabling new technology that makes possible simple affordable, lightweight, optical sensors offering very precise stabilization, random-access pointing programmable multiple simultaneous beams, a dynamic focus/defocus capability, and moderate to excellent optical power handling capability. These new arrays steer or otherwise operate on an already formed beam. A phase profile is imposed on an optical beam as it is either transmitted through or reflected from the phase shifter array. The imposed phase profile steers, focuses, fans out, or corrects phase aberrations on the beam. The array of optical phase shifters is realized through lithographic patterning of an electrical addressing network on the superstrate of a liquid crystal waveplate. Refractive index changes sufficiently large to realize full-wave differential phase shifts can be effected using low (<10 V) voltages applied to the liquid crystal phase plate electrodes. High efficiency large-angle steering with phased arrays requires phase shifter spacing on the order of a wavelength or less; consequently addressing issues make 1-D optical arrays much more practical than 2-D arrays. Orthogonal oriented 1-D phased arrays are used to deflect a beam in both dimensions. Optical phased arrays with apertures on the order of 4 cm by 4 cm have been fabricated for steering green, red, 1.06 μm, and 10.6 μm radiation. System concepts that include a passive acquisition sensor as well as a laser radar are presented KW - array KW - optical KW - phased AU - Mcmanamon, PF AU - Dorschner, TA AU - Corkum, DL AU - Friedman, LJ AU - Hobbs, DS AU - Holz, M AU - Liberman, S AU - Nguyen, HQ AU - Resler, DP AU - Resler, DP AU - Sharp, RC AU - A10 AU - Watson, EA AU - A11 PY - 1996/// UR - http://dx.doi.org/10.1109/5.482231 ER -