Loading...
Please wait, while we are loading the content...
High Sensitivity Strain Sensors Using Four-Core Fibers through a Corner-Core Excitation
| Content Provider | MDPI |
|---|---|
| Author | Suo, Lina Peng, Ya-Pei Yao, Cheng-Kai Ren, Shijie Lu, Xinhe Chen, Nan-Kuang |
| Copyright Year | 2022 |
| Description | A weakly-coupled multicore fiber can generate supermodes when the multi-cores are closer to enter the evanescent power coupling region. The high sensitivity strain sensors using tapered four-core fibers (FCFs) were demonstrated. The fan-in and fan-out couplers were used to carry out light coupling between singlemode fibers and the individual core of the FCFs. A broadband lightsource from superlumminescent diodes (SLDs) was launched into one of the four cores arranged in a rectangular configuration. When the FCF was substantially tapered, the asymmetric supermodes were produced to generate interferences through this corner-core excitation scheme. During tapering, the supermodes were excited based on a tri-core structure initially and then transited to a rectangular quadruple-core structure gradually to reach the sensitivity of 185.18 pm/μԑ under a tapered diameter of 3 μm. The asymmetric evanescent wave distribution due to the corner-core excitation scheme is helpful to increase the optical path difference (OPD) between supermodes for improving the strain sensitivity. |
| Starting Page | 431 |
| e-ISSN | 2072666X |
| DOI | 10.3390/mi13030431 |
| Journal | Micromachines |
| Issue Number | 3 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-03-11 |
| Access Restriction | Open |
| Subject Keyword | Micromachines Remote Sensing Multicore Fiber Four Core Fiber Supermodes Strain Sensors Asymmetric Modes |
| Content Type | Text |
| Resource Type | Article |
