Polarization-maintaining fiber
AssigneeFujikura Ltd.
InventorsYoshikazu Sasaki, Kazuyuki Hayashi, Shoichiro Matsuo
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Abstract
A polarization maintaining fiber includes a core, paired stress applying parts disposed on both sides of the core, and a clad encompassing the core and the paired stress applying parts. When the polarization maintaining fiber has a fiber length of 2 m and a bend radius of 140 mm, the polarization maintaining fiber has a cut-off wavelength equal to or greater than 1.20 μm and less than 1.31 μm. When the polarization maintaining fiber has a bend radius of 5 mm and twists at a rate of one rotation per 31.4 mm of fiber length, the polarization maintaining fiber has a bending loss equal to or less than 6.6 dB at a wavelength of 1.31 μm.
Claims6
A polarization maintaining fiber comprising:
- a core;
- paired stress applying parts disposed on both sides of the core;
- and
- a clad encompassing the core and the paired stress applying parts, wherein
- when the polarization maintaining fiber has a fiber length of 2 m and a bend radius of 140 mm, the polarization maintaining fiber has a cut-off wavelength equal to or greater than 1.20 μm and less than 1.31 μm, and
- when the polarization maintaining fiber has a bend radius of 5 mm and twists at a rate of one rotation per 31.4 mm of fiber length, the polarization maintaining fiber has a bending loss equal to or less than 6.6 dB at a wavelength of 1.31 μm.
Dependencies are inferred from the claim text.