Improving the resolution in quantum and classical temporal imaging

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2018,（9）
• 页码范围: 70-76
• 页数: 7页
• 语种: 英文
• DOI: 10.3788/COL201816.092701

摘要

The point-spread function of an optical system determines its optical resolution for both spatial and temporal imaging.For spatial imaging,it is given by a Fourier transform of the pupil function of the system.For temporal imaging based on nonlinear optical processes,such as sum-frequency generation or four-wave mixing,the point-spread function is related to the waveform of the pump wave by a nonlinear transformation.We compare the point-spread functions of three temporal imaging schemes:sum-frequency generation,co-propagating four-wave mixing,and counter-propagating four-wave mixing,and demonstrate that the last scheme provides the best temporal resolution.Our results are valid for both quantum and classical temporal imaging.