Adaptive image reconstruction for sparse arrays using single-cycle terahertz pulses

作者：Zhang Zhuopeng; Buma Takashi^*

来源：Optics Letters, 2010, 35(10): 1680-1682.

We demonstrate a noniterative adaptive reconstruction technique to significantly improve the imaging performance of sparse terahertz arrays employing single-cycle pulses. Grating lobe artifacts are suppressed by an adaptive weighting factor derived from the temporal coherence of signals from neighboring array elements. Image quality is further improved by a second weighting factor based on the spatial coherence of signals across the entire array. Experiments are performed with a synthetic aperture two-dimensional sparse array of 56 x 56 elements. Our reconstruction technique suppresses artifacts by 30 dB.

• 出版日期2010-5-15