Fiber-based three-dimensional multi-mode interference device as efficient power divider and vector curvature sensor

被引：10

作者：

Zhang, Ziyang ^{[1
]}

Fiebrandt, Julia ^{[1
]}

Haynes, Dionne ^{[1
]}

Sun, Kai ^{[1
]}

Madhav, Kalaga ^{[1
]}

Stoll, Andreas ^{[1
]}

Makan, Kirill ^{[1
]}

Makan, Vadim ^{[1
]}

Roth, Martin ^{[1
]}

机构：

[1] Leibniz Inst Astrophys AIP, InnoFSPEC, D-14482 Potsdam, Germany

来源：

JOURNAL OF OPTICS | 2018年 / 20卷 / 03期

关键词：

multi-mode interference device; optical fibers; spatial division multiplexing; optical sensors; PHOTONIC LANTERNS; OPTICAL-FIBER; GRATINGS;

D O I：

10.1088/2040-8986/aaaa39

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Three-dimensional multi-mode interference devices are demonstrated using a single-mode fiber (SMF) center-spliced to a section of polygon-shaped core multimode fiber (MMF). This simple structure can effectively generate well-localized self-focusing spots that match to the layout of a chosen multi-core fiber (MCF) as a launcher device. An optimized hexagon-core MMF can provide efficient coupling from a SMF to a 7-core MCF with an insertion loss of 0.6 dB and a power imbalance of 0.5 dB, while a square-core MMF can form a self-imaging pattern with symmetrically distributed 2 x 2, 3 x 3 or 4 x 4 spots. These spots can be directly received by a two-dimensional detector array. The device can work as a vector curvature sensor by comparing the relative power among the spots with a resolution of similar to 0.1 degrees over a 1.8 mm-long MMF.

引用

页数：8

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