Twist-Related Speckle Variation in Graded-Index Multimode Fiber
We theoretically investigate a twist-related speckle variation in a graded-index multimode fiber. The simulation results show that by increasing the offset splicing distance between a single-mode fiber and a multimode fiber, the speckle pattern tends to be more chaotic. Also, the fiber length is a c...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2018-01-01
|
| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8453799/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | We theoretically investigate a twist-related speckle variation in a graded-index multimode fiber. The simulation results show that by increasing the offset splicing distance between a single-mode fiber and a multimode fiber, the speckle pattern tends to be more chaotic. Also, the fiber length is a crucial parameter that affects speckle distribution, and the speckle pattern varies periodically along the torsional-less multimode fiber. By exerting twist on a multimode fiber, the speckle pattern revolves. The rotational angle ascends linearly with a twist angle and this tendency is not affected by an offset distance and a fiber length. The theoretic results disclose a twist-related coupling in the graded-index multimode fiber, provide a novel twist sensing method and show potential application in a high-power laser and an imaging field. |
|---|---|
| ISSN: | 1943-0655 |