Journal
OPTICS LETTERS
Volume 43, Issue 13, Pages 3076-3079Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.003076
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Funding
- National Natural Science Foundation of China (NSFC) [61525502, 61435006, 61490715, 61775085, 61705088]
- Pearl River S and T Nova Program of Guangzhou [201710010051]
- National High Technology 863 Research and Development Program of China [2015AA015501]
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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. (C) 2018 Optical Society of America
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