Ultrafast Polarization Stabilizer Based on ZigZag Algorithm in Nested Antiresonant Nodeless Fiber

An ultrafast polarization stabilizer with the ZigZag algorithm is proposed and demonstrated, which is firstly verified in the nested antiresonant nodeless fiber (NANF) transmission system with the multiple input multiple output free (MIMO-free) and chromatic dispersion (CD) compensation free digital signal processing (DSP). The proposed ZigZag algorithm, compared with the Particle Swarm Optimization (PSO) algorithm and the Jacobian Matrix Algorithm (JMA), achieves the lowest computational complexity and the best polarization demultiplexing performance. Additionally, the integration of the stabilizer with the ZigZag algorithm enables effective tracking of linear rotation of state of polarization (RSOP) changes up to 1 Mrad/s and Rayleigh distribution RSOP changes up to 10 krad/s, comparing with the PSO which only can track 5krad/s linear RSOP and 1krad/s Rayleigh distribution RSOP in both 60 Gbaud PDM-16QAM and 20 Gbaud PDM-64QAM 11.1 km NANF transmission systems. Moreover, our stablizer operates efficiently across the entire C+L band of the NANF system and can tolerate up to 5 ps of polarization mode dispersion (PMD). Further, the stabilizer continuously maintains stability in tracking 1 krad/s Rayleigh RSOP for 12 hours, as demonstrated by experimental results, suggesting its potential applicability in optical communication and sensing domains.