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Polarization properties of bent‐type optical fibre probe for magneto‐optical imaging
Author(s) -
Ishibashi T.,
Yoshida T.,
Iijima A.,
Sato K.,
Mitsuoka Y.,
Nakajima K.
Publication year - 1999
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.1999.00506.x
Subject(s) - optics , polarization (electrochemistry) , bent molecular geometry , near field scanning optical microscope , cantilever , materials science , optical microscope , optical fiber , microscope , magnetic field , anisotropy , physics , chemistry , scanning electron microscope , quantum mechanics , composite material
Quantitative evaluation of magneto‐optical parameters is necessary in order to apply scanning near‐field optical microscope (SNOM) technology to the study of magnetism on the mesoscopic scale. For this purpose, quantitative knowledge of polarization transmission properties through an optical fibre probe is required. We therefore determined the Stokes parameters of the bent‐type optical fibre probe that is used as a cantilever for atomic force microscope operation in our SNOM system. As a result, it is found that the degree of polarization is maintained in the light emitted from the probe, although the probe acts as if it were a wave plate. This anisotropic polarization state of the light emitted from the probe was compensated for by using a Berek compensator placed in front of the fibre coupler.