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Coherent light filter
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DOI：10.1364/OL.447393.png)
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Abstract
En 中文
We demonstrate efficient filtering of coherent light from a broad spectral background. A Michelson interferometer is used to effectively filter out the coherent emission of midinfrared lasers from the co-propagating incoherent emission of a broadband thermal source. We show coherent light suppression as high as 16.9 dB without any modification of the broadband incoherent background spectrum. In addition, we demonstrate the ability to measure the spatially dependent (incoherent) thermal emission from a patterned surface, using our filter to remove a coherent signal which would otherwise overload our detection system. The demonstrated filter is rapidly tunable and wavelength-flexible, and has potential for imaging and spectroscopy applications in the presence of an otherwise overpowering coherent signal. (C) 2022 Optica Publishing Group
Keywords:
PHOTOLUMINESCENCE EXCITATION SPECTROSCOPY
Journal
IF:
3.3
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4.0W
Citations:
7.6W