Angular momentum is one of the most basic physical quantities in classical and quantum mechanics. The angular momentum of the laser beam consists of SAM (Spin Angular Momentum) and OAM (Orbital Angular Momentum). The OAM of light corresponds to the rotation of the phase structure, which reveals another degree of freedom that is totally different from SAM. Therefore, OAM has received significant attention.
Orbital Angular Momentum of light attracts people's attention due to its special spiral phase and is quickly used in the field of optical sensing. Since Orbital angular momentum beams with different spiral phases can sense different objects, using OAM beams for optical sensing theoretically could replace all existing sensing methods for sensing all types of targets. Since this is the newest method in the optical sensing field and there are not many articles about this topic, this thesis is written.
Firstly, this paper reviews the background and significance of OAM and research on optical sensing with OAM technology.
Secondly, the theoretical principle of orbital angular momentum is introduced in detail. We mainly focus on in-depth analysis for key technologies in generating and transmitting OAM, OAM conservation theorem, and receiving OAM.
Thirdly, research progress and the practical application of OAM in optical sensing fields is exemplified. The orbital angular momentum is divided into high-order and low-order orbital angular momentum categories, and their examples in the optical sensing field are introduced. For the low-order orbital angular momentum, the application includes ghost imaging and Break the Rayleigh resolution limit. For the high-order orbital angular momentum, the application includes high-order orbital angular momentum entangled state control and Rotational Doppler effect.
Finally, this work looks into the future and proposes some prominent issues to be solved and focused on in the field of optical sensing with Orbital Angular Momentum (OAM).
|Commitee:||Madani, Mohammad, Tessier, Jared|
|School:||University of Louisiana at Lafayette|
|School Location:||United States -- Louisiana|
|Source:||MAI 58/05M(E), Masters Abstracts International|
|Subjects:||Engineering, Electrical engineering|
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