Microbending improved reduced diameter optical fiber.

JP7789457B2Active Publication Date: 2025-12-22CORNING INC
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Patent Information

Application Number
JP2022556071
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-04-03
Filing Date
2021-03-01
Publication Date
2025-12-22
Estimated Expiration
2041-03-01

AI Technical Summary

Technical Problem

Conventional methods for increasing the transmission capacity of submarine cables, such as wavelength division multiplexing and advanced modulation formats, have reached their practical limits, and increasing the cable diameter to accommodate more fibers is impractical due to installation constraints.

Method used

Optical fibers with reduced diameters and optimized coating characteristics, featuring a chlorine and/or alkali metal-doped silica glass core, a cladding region with a depressed-index trench, and high-modulus secondary coating, maintaining microbending resistance and puncture resistance for high fiber density in submarine cables.

Benefits of technology

The solution allows for increased fiber count in submarine cables without increasing diameter, ensuring easy installation and maintaining signal integrity through reduced microbending sensitivity and high puncture resistance.

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Abstract

An optical fiber (10) is provided having a core region (12) and a cladding region (14). The core region (12) is formed from silica glass doped with chlorine and / or alkali metals. The cladding region (14) surrounds the core region (12) and includes an inner cladding immediately adjacent the core region, an outer cladding surrounding the inner cladding, and a trench region radially disposed between the inner and outer claddings. The trench region has a thickness of about 30% Δ·micrometers. 2 In addition, optical fibers have a volume of approximately 100 micrometers. 2 It has an effective area at 1550 nm of less than
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Citation Information

Patent Citations

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    JP2010526749A

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  • Bend-insensitive optical fiber

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