A method for manufacturing a large-size bend-insensitive multimode optical fiber preform

Abstract

The invention relates to a method for producing large-size bending insensitive multi-mode optical fiber performs, which comprises the following steps: a pure quartz glass liner is taken as a core rod substrate pipe, a PCVD or MCVD technology is used for performing doped deposition to form a Ge / F codoped core layer, a Ge / F codoped or F-doped first inner cladding, and a deposition liner of a pure silica second inner cladding; a solid core rod is prepared through deposition and collapsing; then the pure quartz glass liner is used as a casing substrate pipe, a fluorine-doped sunken cladding is deposited; the external layer of the fluorine-doped sunken cladding is taken as a pure silica glassy layer, the inner layer is a doped casing of the F-doped glassy layer; finally the solid core rod is sleeved by the doped casing to prepare the optical fiber performs for a RIT technology, or the solid core rod and the doped casing are assembled and then heated for collapsing to obtain the solid optical fiber performs. According to the invention, external diameter size of the optical fiber is large, making efficiency is high, the method can be used for producing the bending insensitive multi-mode optical fiber with less bending additional loss and excellent DMD performance; and the method has the characteristics of simple and flexible process, and low production cost, and is suitable for large scale production.

Description

technical field [0001] The invention relates to a method for manufacturing a large-size bending-insensitive multimode optical fiber preform, which belongs to the field of optical fiber communication. Background technique [0002] With the continuous development of science and technology, China has entered the era of rapid information development of optical fiber broadband and multi-service integration. The integrated telecommunication network, broadcasting network, and Internet can carry a variety of information services, providing users with various services such as making calls, surfing the Internet, and watching TV. This will inevitably put forward higher requirements for the high bandwidth and flexibility of the network infrastructure of the operator and enterprise data center computer room, so as to be able to support high-performance connections, storage area network (SAN), network-attached storage (NAS) and high-speed Performance computing (such as cloud computing) a...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the liner, the diameter of the bend-insensitive multimode optical fiber preform deposited in the tube is generally less than or equal to 40mm

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