Enforcing Energy Balance in Coherently Superimposed Optical Vortices
The generation of optical beams with multiple, mutually coherent orbital-angular-momentum (OAM) modes using phase gratings is analyzed from the perspective of energy distribution and radial mode composition. We show that phase gratings designed with equally weighted Laguerre-Gauss (LG) modes will ge...
| Main Authors: | , , |
|---|---|
| פורמט: | Article |
| שפה: | English |
| יצא לאור: |
IEEE
2018-01-01
|
| סדרה: | IEEE Photonics Journal |
| נושאים: | |
| גישה מקוונת: | https://ieeexplore.ieee.org/document/8304626/ |
| סיכום: | The generation of optical beams with multiple, mutually coherent orbital-angular-momentum (OAM) modes using phase gratings is analyzed from the perspective of energy distribution and radial mode composition. We show that phase gratings designed with equally weighted Laguerre-Gauss (LG) modes will generate beams with uneven energy distribution among OAM components. This unwanted outcome cannot be corrected by adjusting the width of the illuminating beam. We propose a way to design phase gratings that will produce a uniform energy distribution among the constituent OAM states after illumination while minimizing the content of high radial modes. This method is based on a generalized definition for the LG modes that take advantage of the freedom to select their radial scales. |
|---|---|
| ISSN: | 1943-0655 |