Hollow-core anti-resonance optical fiber capable of transmitting single dark hollow mode

• Main Authors: XIAO YUEYU, YAO RUIMING
• Format: Patent
• Language: Chinese; English
• Published: 14.07.2023
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses a hollow-core anti-resonance optical fiber for transmitting a single-mode dark hollow beam, and belongs to the technical field of optical fibers. The optical fiber structure sequentially comprises an optical fiber outer sleeve, a circular nested cladding tube and an air fiber core from outside to inside, wherein a small circular cladding resonant tube suppression fundamental mode is nested in the two circular cladding tubes on the x axis; and a support plate is nested in the other circular cladding tubes to inhibit the other high-order modes. The loss ratio of a fundamental mode to an LP11 mode is 5770 through the combined action of nested cladding tubes of two structures; other high-order modes LP21 and LP02 are suppressed, and stable transmission of a single-mode dark hollow beam is realized. 本发明公开了一种传输单一模式暗中空光束的空芯反谐振光纤，属于光纤技术领域。该光纤结构由外至内依次为光纤外套管、圆形嵌套包层管和空气纤芯；其中x轴上两个圆形包层管内嵌套一个小的圆形包层谐振管抑制基模；其余圆形包层管内嵌套一个支撑板抑制其余高阶模。通过两种结构嵌套包层管的共同作用，实现基模与LP11模的损耗比为5770；其他高阶模LP21、LP02也得到了抑制，实现单一模式暗中空光束的稳定