期刊
SCIENCE
卷 305, 期 5680, 页码 74-75出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1097631
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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 chiral long-period gratings, dips in transmission were observed at wavelengths associated with scattering into distinct cladding modes mediated by the chiral grating. In chiral intermediate-period gratings, a broad scattering band was observed. These gratings can be used to produce sharp or broad polarization-selective filters.
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