Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Patent
1996-06-06
1998-04-21
Bovernick, Rodney B.
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
385124, G02B 622
Patent
active
057427232
ABSTRACT:
A dispersion compensating fiber has a negative chromatic dispersion slope and a value of chromatic dispersion suitable for practical application, and a bending loss thereof with a bending diameter of 40 mm is smaller than 0.01 dB/m at 1.55 .mu.m. A diameter of a core is larger than 3 .mu.m but smaller than 4 .mu.m. A ratio (Da/Db) of the diameter of the core to an outer diameter of a first cladding is between 0.4 and 0.6 both inclusive. A relative refractive index difference of the core to a second cladding, (nc-n2)
2, is larger than 0.02 but smaller than 0.03. A relative refractive index difference of the first cladding to the second cladding, (n2-n1)
2, is larger than 0.004 but smaller than 0.01. This dispersion compensating optical fiber has a sufficient negative chromatic dispersion slope at wavelengths (1.55 .mu.m to 1.65 .mu.m both inclusive) around 1.55 .mu.m and a bending loss thereof at the wavelength of 1.55 .mu.m with the bending diameter of 40 mm is smaller than 0.01 dB/m.
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Kanamori Hiroo
Onishi Masashi
Bovernick Rodney B.
Sanghavi Hemang
Sumitomo Electric Industries Ltd.
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