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Tunable mode rotator for space-division multiplexing based on a few mode-polarization maintaining fiber
Applied Optics
|November 22, 2016
Summary
This study introduces a tunable mode rotator using few-mode polarization-maintaining fiber (FM-PMF). Rotating the fiber controllably generates desired LP11 (LP21) modes for optical applications.
Area of Science:
- Optical Engineering
- Fiber Optics
- Photonics
Background:
- Mode control is crucial in fiber optics.
- Few-mode fibers offer expanded capacity but require precise mode manipulation.
- Polarization-maintaining fibers provide stable light propagation.
Purpose of the Study:
- To propose and demonstrate a fiber-based tunable mode rotator.
- To achieve controllable generation of specific LP11 (LP21) modes.
- To utilize the properties of few-mode polarization-maintaining fiber (FM-PMF).
Main Methods:
- Utilizing a few-mode polarization-maintaining fiber (FM-PMF).
- Exploiting mode birefringence within the FM-PMF to create a phase difference between degenerate modes.
- Adjusting the aligning angle between the injected LP11 (LP21) mode axis and the FM-PMF axis.
Main Results:
- Demonstration of a tunable mode rotator.
- Controllable generation of a desired LP11 (LP21) mode with a specific orientation at the fiber output.
- The rotation of the FM-PMF segment enables mode tunability.
Conclusions:
- The proposed FM-PMF based device acts as an effective tunable mode rotator.
- This technique allows for precise control over mode generation in few-mode fibers.
- The demonstrated rotator has potential applications in advanced optical communication systems and signal processing.
