Polarization scramblers are widely employed to mitigate polarization fluctuation-related effects for optical signals propagating in fiber systems. We propose an all-optical polarization scrambler configuration based on a polarization beam splitting delayed fiber loop. By deteriorating the coherence of one beam, and controlling the intensity ratio of two orthogonal beams, the polarization scrambler operates in a chaotic regime. The effect on polarization scrambling of loop structure is tested by a home-made narrow-linewidth laser with linewidth of 500 Hz. We investigate the polarization scrambling performance for a commercial distributed feedback laser with linewidth of 3 MHz in various operating regimes. Scrambling speeds under chaotic regime reach 42 Mrad/s with a degree of polarization <0.1 at the maximum sampling rate of 100 MSa/s. We also characterize the dependence of the scrambling speed and average degree of polarization on delay fiber length and wavelengths within the C-band. The output performance of the proposed scrambler for scrambling 40 MHz and 6 GHz modulated signals are tested and waveform distortions are identified due to polarization scrambling.

High speed all-optical polarization scrambler based on polarization beam splitting delayed fiber loop / Wu, Qiang; Gao, Lei; Qiu, Shuai; Wabnitz, Stefan; Liu, Ai; Cao, Yulong; Chang, Zhenghu; Yu, Yuanjie; Long, Yu; Zhu, Tao. - In: JOURNAL OF LIGHTWAVE TECHNOLOGY. - ISSN 0733-8724. - 41:8(2023), pp. 2506-2512. [10.1109/JLT.2022.3233366]

High speed all-optical polarization scrambler based on polarization beam splitting delayed fiber loop

Wabnitz, Stefan;
2023

Abstract

Polarization scramblers are widely employed to mitigate polarization fluctuation-related effects for optical signals propagating in fiber systems. We propose an all-optical polarization scrambler configuration based on a polarization beam splitting delayed fiber loop. By deteriorating the coherence of one beam, and controlling the intensity ratio of two orthogonal beams, the polarization scrambler operates in a chaotic regime. The effect on polarization scrambling of loop structure is tested by a home-made narrow-linewidth laser with linewidth of 500 Hz. We investigate the polarization scrambling performance for a commercial distributed feedback laser with linewidth of 3 MHz in various operating regimes. Scrambling speeds under chaotic regime reach 42 Mrad/s with a degree of polarization <0.1 at the maximum sampling rate of 100 MSa/s. We also characterize the dependence of the scrambling speed and average degree of polarization on delay fiber length and wavelengths within the C-band. The output performance of the proposed scrambler for scrambling 40 MHz and 6 GHz modulated signals are tested and waveform distortions are identified due to polarization scrambling.
2023
polarization effects; optical fibers; polarization scrambler
01 Pubblicazione su rivista::01a Articolo in rivista
High speed all-optical polarization scrambler based on polarization beam splitting delayed fiber loop / Wu, Qiang; Gao, Lei; Qiu, Shuai; Wabnitz, Stefan; Liu, Ai; Cao, Yulong; Chang, Zhenghu; Yu, Yuanjie; Long, Yu; Zhu, Tao. - In: JOURNAL OF LIGHTWAVE TECHNOLOGY. - ISSN 0733-8724. - 41:8(2023), pp. 2506-2512. [10.1109/JLT.2022.3233366]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1673891
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