一种低损耗空芯负曲率少模光纤
By designing a symmetrical nested cladding structure in hollow negative curvature fiber, the mode coupling probability is reduced, the loss problem of hollow negative curvature fiber in few-mode transmission characteristics is solved, and low-loss and low-sensitivity fiber transmission is realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN UNIV OF POSTS & TELECOMM
- Filing Date
- 2023-08-18
- Publication Date
- 2026-07-17
AI Technical Summary
While existing hollow-core negative curvature optical fibers have relatively mature research on single-mode transmission characteristics and polarization preservation characteristics, they suffer from excessive limiting loss and bending loss in few-mode transmission characteristics, which affects the high-quality signal transmission of mode division multiplexing systems.
A low-loss hollow core negative curvature few-mode fiber is designed by uniformly distributing six circular cladding tubes inside the outer tube of the fiber, with gaps between adjacent cladding tubes, and setting support sheets and nested circular tubes inside the cladding tubes to form a symmetrical nested cladding structure, thereby reducing the mode coupling probability.
It effectively reduces confinement loss and bending loss during optical fiber transmission, supports weak coupling transmission of six fiber core modes: LP01, LP11, LP21, LP02, LP31, and LP12, and ensures high-quality signal transmission.
Smart Images
Figure CN117192681B_ABST