This paper proposes a polarization-dependent semiconductor optical amplifier (SOA)based polarization shift keying (PolSK) modulation for turbulence-robust free-space optical (FSO) communication. Based on the nonlinear gain and polarization characteristics, the PolSK signal is modulated by the optical bit inversion using the polarization-dependent SOA and linear polarizer (LP). The capability of scintillation mitigation is analyzed under both balanced and polarization-independent SOA-based detections. The proposed technique is evaluated in experiments. The experimental results demonstrated that the bit-error-rate (BER) performance of the proposed technique was close to the conventional Mach-Zehnder modulator (MZM)-based PolSK modulation under various scintillation effects.
Bibliographical noteFunding Information:
Acknowledgments. This work was supported by the Institute for Information and Communications Technology Promotion (IITP) grant funded by the Korean government (MSIT; Ministry of Science and ICT) (No. 2019-0-00685, Free-space-optical-communication-based vertical mobile network).
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All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics