Polarization multiplexed 16QAM transmission employing modified digital back-propagation

Rafique, Danish; Mussolin, Marco; Mårtensson, Jonas; Forzati, Marco; Fischer, Johannes; Molle, L.; Nölle, Markus; Schubert, C.; Ellis, A.D.

doi:10.1364/oe.19.00b805

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…Polarization modulation, a technique for controlling the vibration direction of electromagnetic waves, offers numerous benefits across a range of fields. In optical and microwave communication, the use of polarization modulation technology introduces additional dimensions of information, significantly increasing the reliability and capacity of signal transmission [5][6][7] ; moreover, the resulting signals are robust, better able to withstand external noise and interference. Within image and video processing, polarization modulation technology is effective in enhancing the clarity and contrast of images, especially in challenging lighting conditions [8][9] .…”

Section: Introductionmentioning

confidence: 99%

Optical polarized orthogonal matrix

Tan,

Zheng,

Tan

et al. 2024

Preprint

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Orthogonal matrices have become indispensable tools in various fields, including coding, signal processing, and light field regulation. Traditionally, it has been assumed that orthogonal matrices consist of one-dimensional elements capable of modulating only amplitude or phase information. However, light waves have another critical dimension-polarization. Existing polarization orthogonal combinations have faced limitations, with a maximum pairwise orthogonal combination of 2 mapped to the basic Poincaré Sphere, hindering the regulation of polarization. Despite these challenges, we demonstrate the feasibility of constructing Optical Polarized Orthogonal Matrices (OPOMs) without restricted orthogonal numbers. This non-square matrix composed of polarization unit vectors, shows promise for multi-channel information retrieval and dynamic image display. The versatility of OPOM can be extended to various fields such as optical communication, optical storage, logic devices, anti-counterfeiting, and optical encryption.

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Section: Introductionmentioning

confidence: 99%

Optical polarized orthogonal matrix

Tan,

Zheng,

Tan

et al. 2024

Preprint

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“…The transmission distance is mainly limited by optical noise coming from erbium doped fiber amplifiers (EDFAs) and waveform degradation owing to optical Kerr effect [1,2]. As a solution of the latter, compensation techniques in receiver-side digital signal processing (DSP), such as digital-back propagation [3,4,5,6,7], Volterra series [8,9,10] and neural network methods [11,12,13,14] have been studied. Their algorithm can be flexible and can be modified without additional physical device.…”

Section: Introductionmentioning

confidence: 99%

Amplitude noise suppression of BPSK signals using transmission optical fibers and optical parametric phase-sensitive amplifiers

Okamura

Takada

2022

IEICE Electron. Express

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In this letter, we numerically investigate noise suppression using self-phase-modulation (SPM) in transmission optical fiber and degenerate phase-sensitive optical amplifier (PSA). It is clarified that the optimum fiber input signal power for SPM and phase shift for amplitude noise suppression of 10 Gbit/s binary-phase-shift keyed (BPSK) signals. Then, 10-Gbit/s BPSK signal transmission on multirelay systems is evaluated. When the fiber input optical power is 5 mW, the signal-to-noise ratio (SNR) of PSA output is larger than 20 dB on 200-relays while SNR of the conventional PSA output is 15 dB after 63-relays.

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“…On the other hand, fiber nonlinearity compensation has recently been employed in both optical and digital domain [10][11][12], and enables interesting prospects for network growth scenarios. The key problem associated with digital nonlinearity compensation, typically known as digital back-propagation, is the complexity involved, even for intra-channel or single-channel nonlinearity compensation [13].…”

Section: Introductionmentioning

confidence: 99%

Intra super-channel fiber nonlinearity compensation in flex-grid optical networks

Rafique¹,

Rahman²,

Napoli³

et al. 2013

Opt. Express

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Abstract:We report on the nonlinear transmission limits of various superchannel configurations in a flex-grid network upgrade scenario. In particular, we consider flexible data-rates ranging from 180Gb/s to 1.2Tb/s, employing either single-carrier, dual-carrier, or penta-carrier polarization multiplexed m-state quadrature amplitude modulation (PM-8QAM/PM-16QAM) -termed as super-channels, and establish transmission performance margins for each configuration, both with and without superchannel fiber nonlinearity compensation. Our results show that the benefit of intra super-channel nonlinearity mitigation (nonlinear compensation addressing full super-channel bandwidth) reduces with increasing subcarrier count within the super-channel, and that single-carrier super-channel achieves the maximum improvement from nonlinearity mitigation (up to ~4.5dB, in Q-factor), better than dual-carrier (up to ~3.5dB) and pentacarrier (up to ~2dB) configurations. Moreover, the maximum reach improvement, compared to linear compensation only, is found to be ~170%

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Polarization multiplexed 16QAM transmission employing modified digital back-propagation

Cited by 8 publications

References 18 publications

Optical polarized orthogonal matrix

Optical polarized orthogonal matrix

Amplitude noise suppression of BPSK signals using transmission optical fibers and optical parametric phase-sensitive amplifiers

Intra super-channel fiber nonlinearity compensation in flex-grid optical networks

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