Photonics Research, 2019, 7 (6): 06000669, Published Online: May. 29, 2019  

Spectral measurement of coherence Stokes parameters of random broadband light beams Download: 610次

Author Affiliations
Institute of Photonics, University of Eastern Finland, FI-80101 Joensuu, Finland
Abstract
We introduce a spectrally resolved Young’s interferometer based on a digital micromirror device, a grating spectrometer, and a set of polarization-modulation elements to measure the spectral coherence (two-point) Stokes parameters of random light beams. An experimental demonstration is provided with a spatially partially coherent superluminescent diode amounting to a complex structure of spatio-spectral coherence induced by a quartz-wedge depolarizer. We also show that the polarization and spatial coherence of light can vary with wavelength on a subnanometer scale. The technique is simple and robust and applies to light beams with any spectral bandwidth.

Henri Partanen, Ari T. Friberg, Tero Set?l?, Jari Turunen. Spectral measurement of coherence Stokes parameters of random broadband light beams[J]. Photonics Research, 2019, 7(6): 06000669.

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