31-10-2013 дата публикации
Номер: US20130287353A1
A hybrid optical fiber integrates features of multimode optical fibers and single-mode optical fibers. The hybrid optical fiber possesses an optical core having a first core region and a second core region to provide improved optical mode coupling ratio for single-mode transmission while maintaining a broad bandwidth for multimode transmission. The hybrid optical fiber's optical core may optionally include a depressed trench positioned between the optical core's first core region and the optical core's second core region to reduce modal dispersion and to improve modal bandwidth during multimode transmissions. 2. The optical fiber according to claim 1 , wherein the radius aof the first core region is between 1.5 microns and 4.5 microns.3. The optical fiber according to claim 1 , wherein the non-dimensional parameter α is between 1 and 5.4. The optical fiber according to claim 1 , wherein the non-dimensional parameter α is between about 1.7 and 2.5.5. The optical fiber according to claim 1 , wherein (i) the refractive index difference Δbetween the first core region and the second core region and (ii) the radius aof the first core region satisfy the following inequality:{'br': None, 'i': a', 'a', 'a', 'a', 'a', 'a, 'sub': s', 's', 's', 's', 's', 's', 's, 'sup': 4', '3', '2', '2, '0.0549−0.9053+5.483−14.39+13.75<1000·Δ<1.11−6.9145+17.94.'}6. The optical fiber according to claim 1 , wherein (i) the refractive index difference Δbetween the first core region and the second core region and (ii) the radius aof the first core region satisfy the following inequality:{'br': None, 'i': a', 'a', 'a', 'a', 'a', 'a, 'sub': s', 's', 's', 's', 's', 's', 's, 'sup': 4', '3', '2', '2, '0.0373−0.6145+4.0286−12.217+14.739<1000<Δ<0.9821−6.5036+16.7.'}7. The optical fiber according to claim 1 , wherein:{'sub': s', 's, 'claim-text': {'br': None, 'i': a', 'a', 'a', 'a, 'sub': s', 's', 's', 's', 's, 'sup': 2', '2, '0.17173−1.6926+5.1835<Δ<0.26184−3.1935+10.5832.'}, 'the radius a of the second ...
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