Yangtze Optical Fibre and Cable Joint Stock Limited Company

Wufeng Xiao

Runhan Wang

Rong Huang

Tiejun Wang

Ruichun Wang

Beibei Cao

Honghai Wang

Haiying Wang

TieJun Wang

Halying Wang

Changkun Yan

Anlin Zhang

Ming Cheng

Di Yang

A high-bandwidth bend-insensitive multimode fiber includes a core laver and a cladding including an inner cladding, a depressed cladding, and an outer cladding arranged sequentially from inside to outside. The core layer is a silicon dioxide glass layer co-doped with germanium, phosphorus (P), and fluorine (F) and has a refractive index profile in a shape of a parabola, a distribution index in a range of 2.0-2.3, a radius in a range of 23-27 &#x3bc;m, and a maximum relative refractive index difference in a range of 0.9-1.2% at its center. A contribution amount of P at the center is in a range of 0.01-0.30%. A doping amount of F increases from the center to the edge of the core layer. A contribution amount of F at the center and edge of the core layer is in range of 0.0% to &#x2212;0.1%, and &#x2212;0.40% to &#x2212;0.20%, respectively.

High-bandwidth bend-insensitive multimode fiber

A low-dispersion single-mode fiber includes a core and claddings covering the core. The core layer has a radius in a range of 3-5 &#x3bc;m and a relative refractive index difference in a range of 0.15% to 0.45%. The claddings comprise a first depressed cladding, a raised cladding, a second depressed cladding, and an outer cladding arranged sequentially from inside to outside. The first depressed cladding has a unilateral width in a range of 2-7 &#x3bc;m and a relative refractive index difference in a range of &#x2212;0.4% to 0.03%. The raised cladding has a unilateral width in a range of 2-7 &#x3bc;m and a relative refractive index difference in a range of 0.05% to 0.20%. The second depressed cladding has a unilateral width in a range of 0-8 &#x3bc;m and a relative refractive index difference in a range of 0% to &#x2212;0.2%. The outer cladding is formed of pure silicon dioxide glass.

Low-dispersion single-mode optical fiber

A small core-diameter graded-index optical fiber include a core layer and a cladding having an inner cladding layer, a depressed cladding layer, and an outer cladding layer from inside to outside thereof. The core layer has a parabolic refractive index profile with a distribution index in a range of 1.9-2.1, a radius in a range of 10-21 &#x3bc;m, and a &#x394;1 max in a range of 0.7-1.7% at a core layer center, and is a silica glass layer co-doped with germanium, phosphorus, and fluoride. The inner cladding layer is a pure silica layer or an F-doped silica glass layer, and has a unilateral width in a range of 0.5-5 &#x3bc;m and a &#x394;2 in a range of &#x2212;0.4-0%. The depressed cladding layer has a unilateral width in a range of 2-10 &#x3bc;m and a &#x394;3 in a range from &#x2212;0.8% to &#x2212;0.2%. The outer cladding layer is a pure silica glass layer.

Small core-diameter graded-index optical fiber

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Hubei, China

Wufeng Xiao