Yangtze Optical Fibre and Cable Joint Stock Limited Company

Yangtze Optical Fibre Cable Joint Stock Limited Company

Jihong Zhu

Ruichun Wang

Jun Wu

Shengya Long

Lei Zhang

Rui Zhang

Hongyan Zhou

Liang Al

A single-mode fiber with ultralow attenuation includes a core layer and cladding layers. The cladding layers includes an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary cladding layer. The core layer has a radius of 3.9-4.8 &#x3bc;m and a relative refractive index difference of &#x2212;0.08% to 0.10%. The inner cladding layer has a radius of 9-14 &#x3bc;m and a relative refractive index difference of &#x2212;0.40% to &#x2212;0.15%. The trench cladding layer has a radius of 13-25 &#x3bc;m and a refractive index difference of &#x2212;0.7% to &#x2212;0.3%. The auxiliary outer cladding layer has a radius of 30-50 &#x3bc;m and a relative refractive index difference of &#x2212;0.4% to &#x2212;0.15%. The outer cladding layer is a pure silicon dioxide glass layer.

Single-mode fiber with ultra low attenuation

An optical fiber with ultra-low attenuation and large effective-area includes a core layer and cladding layers. The cladding layers have an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The core layer has a radius of 4.8-6.5 &#x3bc;m, and a relative refractive index difference of &#x2212;0.06% to 0.10%. The inner cladding layer has a radius of 9-15 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.40% to &#x2212;0.15%. The trench cladding layer has a radius of about 12-17 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.8% to &#x2212;0.3%. The auxiliary outer cladding layer has a radius of about 37-50 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.6% to &#x2212;0.25%. The outer cladding layer is a pure silicon-dioxide glass layer.

Single-mode optical fiber with ultra low attenuation and large effective area

An optical fiber with ultra-low attenuation and bend insensitivity includes a core layer and cladding layers. The cladding layers have an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The core layer has a radius of 3.0-3.9 &#x3bc;m, and a relative refractive index difference of &#x2212;0.04% to 0.12%. The inner cladding layer has a radius of 8-14 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.35% to &#x2212;0.10%. The trench cladding layer has a radius of about 14-20 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.6% to &#x2212;0.2%. The auxiliary outer cladding layer has a radius of about 35-50 &#x3bc;m, and a relative refractive index difference of about &#x2212;0.4% to &#x2212;0.15%. The outer cladding layer is a pure silicon-dioxide glass layer.

Single mode optical fiber with ultra-low attenuation and bend insensibility

A bending-insensitive single-mode fiber with ultralow attenuation includes a core layer and cladding layers. The cladding layers includes an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary cladding layer. The core layer has a radius of 3.0 to 3.9 &#x3bc;m and a relative refractive index of &#x2212;0.04% to 0.12%. The inner cladding layer has a radius of 8 to 14 &#x3bc;m and a relative refractive index &#x2212;0.35% to &#x2212;0.10%. The trench cladding layer has a radius of 14 to 20 &#x3bc;m and a relative refractive index of &#x2212;0.6% to &#x2212;0.2%. The auxiliary outer cladding layer has a radius of 35 to 50 &#x3bc;m and a relative refractive index of &#x2212;0.4% to &#x2212;0.15%. The outer cladding layer is a pure silica glass layer.

Bending-insensitive single-mode fiber with ultra low attenuation

A doping optimized single-mode optical fiber with ultra low attenuation includes a core layer and cladding layers. The cladding layers has an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The content of fluorine in the core layer is &#x2264;0.5 wt %, &#x394;Ge&#x2264;0.12%, &#x394;n&#x2264;0.12%. The content of fluorine in the inner cladding layer is 0.5-1.5 wt %, &#x394;n&#x2264;&#x2212;0.14%. The content of fluorine in the trench cladding layer is 1-3 wt %, &#x394;n&#x2264;&#x2212;0.25%. The content of fluorine in the auxiliary outer cladding layer is 0.5-2 wt %, &#x394;n&#x2264;&#x2212;0.14%. The outer cladding layer is a pure silicon dioxide glass layer and/or a metal-doped silicon dioxide glass layer.

Doping optimized single-mode optical fiber with ultra low attenuation

A single-mode fiber with an ultra-low attenuation and a large effective area includes a core layer having a radius of 4.8 to 6.5 and a relative refractive index difference &#x394;nof &#x2212;0.06% to 0.10%, and cladding layers. The cladding layers includes an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary cladding layer. The inner cladding layer has a radius of 9 to 15 &#x3bc;m and a relative refractive index difference of &#x2212;0.40% to &#x2212;0.15%. The trench cladding layer has a radius of 12 to 17 &#x3bc;m and a relative refractive index difference of &#x2212;0.8% to &#x2212;0.3%. The auxiliary outer cladding layer has a radius of 37 to 50 &#x3bc;m and a relative refractive index difference of &#x2212;0.6% to &#x2212;0.25%. The outer cladding layer is a pure-silicon-dioxide glass layer.

Growing community of inventors

Hubei, China

Jihong Zhu