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Approach to multiplexing fiber communication with cylindrical vector beams
Optics Letters
|September 29, 2017
Summary
Cylindrical vector beams (CVBs) enable multiplexing communication in few-mode fibers. This study demonstrates successful CVB (de)multiplexing with high mode purity and low crosstalk, achieving error rates below the FEC threshold for 10 Gbit/s signals.
Area of Science:
- Optical communications
- Photonics
- Fiber optics
Background:
- Cylindrical vector beams (CVBs) are fiber eigenmodes with unique polarization properties.
- Few-mode fibers (FMFs) offer potential for increased communication capacity.
- CVBs can be utilized for advanced multiplexing schemes.
Purpose of the Study:
- To propose and demonstrate cylindrical vector beam (de)multiplexing in few-mode fiber (FMF).
- To analyze the performance of CVB multiplexing in terms of mode purity and crosstalk.
- To evaluate the feasibility of CVB multiplexing for high-speed data transmission.
Main Methods:
- Simulation of eight CVB modes (±1 and ±2 orders) in FMF.
- Experimental measurement of mode purities for transmitted CVBs.
- Demonstration of four-mode coaxial CVB multiplexing with orthogonal polarization states.
- Transmission of 10 Gbit/s on-off keying signals over 5 km FMF.
Main Results:
- Mode purities for ±1 and ±2 order CVBs reached up to 73.84% after 5 km FMF transmission.
- Mode crosstalk between adjacent CVB orders was below -7.54 dB.
- Experimental demonstration achieved crosstalk below -23.35 dB for all multiplexed channels.
- Bit-error rates remained below the forward error correction threshold of 3.8×10-3.
Conclusions:
- CVB (de)multiplexing is a viable communication scheme in few-mode fibers.
- High mode purity and low crosstalk are achievable with CVB multiplexing.
- CVB multiplexing supports high-speed data transmission in FMF, showing promise for future optical networks.
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