Chiral fiber gratings |
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| Authors: | Kopp Victor I Churikov Victor M Singer Jonathan Chao Norman Neugroschl Daniel Genack Azriel Z |
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| Institution: | Chiral Photonics, Inc., Clifton, NJ 07012, USA. vickopp@chiralphotonics.com |
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| Abstract: | Chiral gratings with double helix symmetry were produced by twisting glass optical fiber with a noncircular core cross section as it passed through a miniature oven. We observed polarization-selective transmission in chiral fibers with pitches of tens of micrometers. Two modes of optical interaction were differentiated. In chirallong-period gratings, dips in transmission were observed at wavelengths associated with scattering into distinct cladding modes mediated by the chiral grating. In chiral intermediateperiod gratings, a broad scattering band was observed. These gratings can be used to produce sharp or broad polarization-selective filters. |
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