Adaptive dispersion compensation using a photonic integrated circuit finite impulse response filter
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(Published version)
Date
2023
Authors
Liu, X.
Ren, G.
Xu, X.
Dubey, A.
Feleppa, T.
Boes, A.
Mitchell, A.
Lowery, A.
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Journal article
Citation
Optics Express, 2023; 31(22):35971-35981
Statement of Responsibility
Xumeng Liu, Guanghui Ren, Xingyuan Xu, Aditya Dubey, Timothy Feleppa, Andreas Boes, Arnan Mitchell, and Arthur Lowery
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Abstract
Optical equalization can be used for chromatic dispersion compensation in optical communication systems to improve the system performance; however, optical signal processing (OSP) is generally specifically designed for transmission channels, that is non-adaptive to dynamic transmission distortions compared with digital signal processing (DSP). In this contribution, we demonstrate optical equalization using a photonic integrated circuit (PIC) filter for chromatic dispersion compensation, with static and adaptive techniques: (a) the static optical equalizer is calibrated based on the known fiber dispersion and length, by using the fractional delay reference method; (b) the adaptive optical equalizer is updated iteratively to compensate transmission impairments based on a least-mean squares (LMS) algorithm. Experimental results show that both the static optical equalizer and the adaptive optical LMS equalizer can give an 18-dB Q-factor for a 14-Gbd QPSK signal transmitting over 30 km. To highlight the capability of the optical equalizers, we use simulations to show the improvement in dispersion compensating characteristics by implementing additional taps.
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Published 12 Oct 2023
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© 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement