基于无衍射光的光互连系统的对准偏差研究

以信噪比为性能指标,以相邻光通道之间的串扰和探测器前置放大器的热噪声作为系统噪声的来源,研究了基于无衍射光的光互连系统在不同对准偏差条件下的性能.研究表明,探测器阵列的尺寸参数可作为系统对准偏差容忍度和信噪比的优化参数.扩大探测器半径,减小探测器间距可以使系统包容更大的对准偏差,但为了保证一个可以接受的信噪比,探测器间距不应过小.此外,采用无衍射光的光互连系统具有不受纵向对准偏差影响的优点.

Misalignment Analysis of Optical Interconnects Based on Non-Diffracted Beams

The performance of optical interconnects utilizing non-diffracted beams under different misalignment conditions was analyzed. The signal-to-noise ratio (SNR) was used as the performance index, and the integral optical crosstalk of adjacent channels and detector pre-amplifier thermal noise were treated as the main noise. The results show that the pitch and size of detectors can be used as optimization parameters for maximal misalignment tolerance and a high SNR. Increasing of detector radius and decreasing of spacing between detectors can tolerate greater misalignment, but the spacing cannot be too small in order to achieve an acceptable SNR. Moreover, optical interconnects using non-diffracting beams has the advantage that it is not affected by longitudinal misalignment.