Chinese Optics Letters, Vol. 15, Issue 3, 030012 (2017)
Remotely sensing an object’s rotational orientation using the orbital angular momentum of light (Invited Paper)
Giovanni Milione1,*, Ting Wang1, Jing Han2, and Lianfa Bai2
- 1Optical Networking and Sensing Department, NEC Laboratories America, Inc., Princeton, NJ 08540, USA
- 2School of Electronic Engineering and Optoelectronic Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Remotely sensing an object with light is essential for burgeoning technologies, such as autonomous vehicles. Here, an object’s rotational orientation is remotely sensed using light’s orbital angular momentum. An object is illuminated by and partially obstructs a Gaussian light beam. Using an SLM, the phase differences between the partially obstructed Gaussian light beam’s constituent OAM modes are measured analogous to Stokes polarimetry. It is shown that the phase differences are directly proportional to the object’s rotational orientation. Comparison to the use of a pixelated camera and implementation in the millimeter wave regime are discussed.
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