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Spatial mode detection by frequency upconversion
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DOI：10.1364/OL.44.000586.png)
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Abstract
En 中文
The efficient creation and detection of spatial modes of light has become topical of late, driven by the need to increase photon bit-rates in classical and quantum communications. Such mode creation/detection is traditionally achieved with tools based on linear optics. Here we put forward a new spatial mode detection technique based on the nonlinear optical process of sum-frequency generation. We outline the concept theoretically and demonstrate it experimentally with intense laser beams carrying orbital angular momentum and Hermite-Gaussian modes. Finally, we show that the method can be used to transfer an image from the infrared band to the visible, which implies the efficient conver- sion of many spatial modes. (C) 2019 Optical Society of America
Keywords:
PHASE
LIGHT
CREATION
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