公开(公告)号：US11016441B2

公开(公告)日：2021-05-25

申请号：US16278351

申请日：2019-02-18

Applicant: II-VI Delaware, Inc.

Inventor： Kun Gao ,  Jack R. Kelly ,  Helen Chen ,  Guomin Jiang ,  Xinran Wang ,  Lixin (Lawrence) Wang ,  Qingyu (Tom) Li ,  Haiji J. Yuan

IPC: G03H1/08 ,  G03H1/16

Abstract: A two-step optimization process is utilized to define an optimal phase profile for a LCoS spatial light modulator. The two-step optimization process first utilizes a nonlinear constrained optimization (NCO) program to determine the specific parameters required to obtain an optimal phase profile (hologram), where the “optimal phase profile” is typically defined as that profile which achieves maximum diffraction efficiency for optical switching. Following this first step, phase scaling (and perhaps an adjustment in the number of pixels per period) is employed to slightly modify the values of the optimal phase profile to effectively suppress crosstalk peaks. If any orders still exhibit an unacceptable level of crosstalk, these orders are then subtracted from the phase profile to create the final design.

公开(公告)号：US20200264558A1

公开(公告)日：2020-08-20

申请号：US16278351

申请日：2019-02-18

Applicant: II-VI Delaware, Inc.

Inventor： Kun Gao ,  Jack R. Kelly ,  Helen Chen ,  Guomin Jiang ,  Xinran Wang ,  Lixin (Lawrence) Wang ,  Qingyu (Tom) Li ,  Haiji J. Yuan

IPC: G03H1/08 ,  G03H1/16

Abstract: A two-step optimization process is utilized to define an optimal phase profile for a LCoS spatial light modulator. The two-step optimization process first utilizes a nonlinear constrained optimization (NCO) program to determine the specific parameters required to obtain an optimal phase profile (hologram), where the “optimal phase profile” is typically defined as that profile which achieves maximum diffraction efficiency for optical switching. Following this first step, phase scaling (and perhaps an adjustment in the number of pixels per period) is employed to slightly modify the values of the optimal phase profile to effectively suppress crosstalk peaks. If any orders still exhibit an unacceptable level of crosstalk, these orders are then subtracted from the phase profile to create the final design.