Measuring high-order optical orbital angular momentum with a hyperbolic gradually changing period pure-phase grating.
Opt Lett
; 43(13): 3076-3079, 2018 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-29957785
ABSTRACT
We present a method to measure the high-order orbital angular momentum (OAM) state of a light beam with a static hyperbolic gradually changing period pure-phase grating (HGCP-PPG). From the number and orientation of the fringes of the Hermite-Gaussian-like diffraction intensity pattern, the OAM state of the incident Laguerre-Gaussian beam can be measured. Experimental detection of the OAM state up to ±100-order has been achieved. This method is highly efficient and robust because the HGCP-PPG is adaptive to high-order OAM beam and tolerant of the misalignment of the incident OAM beam.
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MEDLINE
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En
Ano de publicação:
2018
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Article