Graduation Year
2019
Document Type
Dissertation
Degree
Ph.D.
Degree Name
Doctor of Philosophy (Ph.D.)
Degree Granting Department
Physics
Major Professor
Zhimin Shi, Ph.D.
Committee Member
Myung K. Kim, Ph.D.
Committee Member
Jiangfeng Zhou, Ph.D.
Committee Member
Hubei Jiang, Ph.D.
Keywords
holography, optical communications, optical metrology, polarimetric imaging
Abstract
Currently, many areas of optical techniques including imaging, inspection and communication emphasize the utilization of the high-dimensional information encoded in optical fields. There is also a requirement for novel measurement techniques to extract this high-dimensional information with high-speed and accuracy. We firstly introduce a scan-free direct measurement technique that is capable of simultaneously characterizing the amplitude and phase of a coherent scalar optical field. Our direct measurement approach is constituted of a weak polarization perturbation which is followed by the recording of a polarization-resolving imaging process. The weak perturbation rotates the linear polarization on the spatial frequency domain of the detected field without noticeably changing the properties of the optical field. Then the high-dimensional Stokes parameter profiles are recorded in a single-shot such that the amplitude and phase profiles of the optical field are presented without some of the common complications from imaging or digital processing methods. Because our approach does not require an additional reference beam, the common-path optical configuration can minimize the effects of vibration and reduce the complication of the optical system. We have also developed our technique to measure the high-dimensional information encoded in an optical vector field, which has spatially varying polarization and phase profiles. Through a sequence of separating polarization components, a weak polarization perturbation, and a polarization-resolving imaging process, the final readout is directly related to the complex amplitude profile of the two polarization components of the vector beam. We experimentally demonstrate that our direct measurement technique can characterize both scalar and optical vector fields in a single-shot proving its use as a high-speed, extremely high-resolution, unambiguous measurement technique.
Currently, many areas of optical techniques including imaging, inspection and communication emphasize the utilization of the high-dimensional information encoded in optical fields. There is also a requirement for novel measurement techniques to extract this high-dimensional information with high-speed and accuracy. We firstly introduce a scan-free direct measurement technique that is capable of simultaneously characterizing the amplitude and phase of a coherent scalar optical field. Our direct measurement approach is constituted of a weak polarization perturbation which is followed by the recording of a polarization-resolving imaging process. The weak perturbation rotates the linear polarization on the spatial frequency domain of the detected field without noticeably changing the properties of the optical field. Then the high-dimensional Stokes parameter profiles are recorded in a single-shot such that the amplitude and phase profiles of the optical field are presented without some of the common complications from imaging or digital processing methods. Because our approach does not require an additional reference beam, the common-path optical configuration can minimize the effects of vibration and reduce the complication of the optical system. We have also developed our technique to measure the high-dimensional information encoded in an optical vector field, which has spatially varying polarization and phase profiles. Through a sequence of separating polarization components, a weak polarization perturbation, and a polarization-resolving imaging process, the final readout is directly related to the complex amplitude profile of the two polarization components of the vector beam. We experimentally demonstrate that our direct measurement technique can characterize both scalar and optical vector fields in a single-shot proving its use as a high-speed, extremely high-resolution, unambiguous measurement technique.
Scholar Commons Citation
Zhu, Ziyi, "Measuring and Utilizing High-Dimensional Information of Optical Fields" (2019). USF Tampa Graduate Theses and Dissertations.
https://digitalcommons.usf.edu/etd/8097
