400 Gbps PM-QPSK Transmission for Metro-DCI Applications Employing 20 Gbaud Transmitter

Narayanan, Lakshmi; Sobhanan, Aneesh; Venkitesh, Deepa; Koilpillai, R. David

doi:10.1364/fio.2018.jw4a.81

Cited by 3 publications

(2 citation statements)

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“…Further, Space Division Multiplexing (SDM) and Multiple In Multiple Out (MIMO) architectures are challenging the nonlinear Shannon limit for single-mode transmission [71], [72]. Even short-haul links are now moving to 400G and beyond employing advanced modulation like PAM4 [73]- [75]. But these advanced modulation formats cannot be analyzed using the framework; though it may seem like a severe limitation, there are plenty of current and emerging fields where such an analysis could be beneficial.…”

Section: Discussion -Limitations and Applicationsmentioning

confidence: 99%

A Performance Limit Estimation Framework for Multihop Repeated/Regenerated Optical Links

Francis

Manivasakan

2022

IEEE Access

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We propose and demonstrate a generalized framework for performance limit evaluation and comparison of multihop optical repeated and regenerated links. The model developed is implementation agnostic and applies to multihop optical links of varied forms, including fiber, free space, and underwater links. The framework estimates the best-case performance gains of deploying an all-regenerative link over an all-repeater link for any given implementation. The implementation-independent technique is then illustrated using guided and free-space optical links. An abstract model is developed first with the evolution of signal, noise power, and bit error rate down the link compared and contrasted for both cases. The model is then evaluated using physical parameters for a typical fiber optic intensity-modulated direct detection link, and the obtained all-regenerator link performance advantage is translated to extra reach and lower transmission power requirements. Further, certain approximations are provided to reduce computational complexity and improve the analytical tractability of the procedure, which could be particularly helpful when employed in specialized hardware or for dynamic reconfiguration networks. Finally, the framework's versatility is established by employing it in analyzing an ideal free-space link and comparing amplify and forward links against decode and forward counterparts. Similar results are also reproduced on a commercial optical link simulation suite. Detailed literature on link analysis is provided for fiber, free space, and underwater links, bringing out their similarities. We conclude by elaborating on various current and emerging application domains and certain limitations of the proposed technique.

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Section: Discussion -Limitations and Applicationsmentioning

confidence: 99%

A Performance Limit Estimation Framework for Multihop Repeated/Regenerated Optical Links

Francis

Manivasakan

2022

IEEE Access

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“…With the development of coherent optical communication technology, high spectral efficiency (SE) modulation scheme is an important research direction. Polarization multiplexing quadrature phase shift keying (PM-QPSK) coherent optical transmission system combines polarization multiplexing technology, multi-base debugging technology, coherent detection technology and digital signal processing (DSP) technology, which has high SE, optical signal noise ratio (OSNR) sensitivity and moderate implementation complexity [1], [2], [3]. Polarization switched quadrature phase shift keying (PS-QPSK) coherent optical transmission system can be obtained by local adjustment on the basis of PM-QPSK system, and has been regarded as the simplest and the most energy efficient four-dimensional (4D) modulation scheme since it was proposed [4], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

A Novel 32-Point Modulation Scheme of 6PolSK-QPSK Signal

Li,

Zhang,

et al. 2023

IEEE Access

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The six-polarization shift keying quadrature (6PolSK-QPSK) has been proved to be an alternative to four-dimensional (4D) modulation scheme. A variety of transmission compensation schemes have been developed for 24-Point 6PolSK-QPSK combining the advantages of polarization multiplexing quadrature phase shift keying (PM-QPSK) and polarization switched quadrature phase shift keying (PS-QPSK). In order to further improve the transmission rate of the signal system, 32-Point 6PolSK-QPSK signal modulation has been studied. We propose a novel encoding rule and compensation scheme for 32-Point 6PolSK-QPSK modulation by classifying symbols. The simulation tool based on VPItransmis-sionMaker10.1 is equipped with 32-Point 6PolSK-QPSK signal transmission system and the off-line digital signal processing (DSP) module is applied to MATLAB to prove the method proposed in this paper. The simulation results show that the error performance of 2.6 dB and 8.7 dB are improved for unrevised and revised data transmission, compared with the 32-Point 6PolSK-QPSK signal scheme obtained by rotating PM-QPSK.

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Changing phases of fiber optic communication

Venkitesh

2021

J Opt

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400 Gbps PM-QPSK Transmission for Metro-DCI Applications Employing 20 Gbaud Transmitter

Cited by 3 publications

References 1 publication

A Performance Limit Estimation Framework for Multihop Repeated/Regenerated Optical Links

A Performance Limit Estimation Framework for Multihop Repeated/Regenerated Optical Links

A Novel 32-Point Modulation Scheme of 6PolSK-QPSK Signal

Changing phases of fiber optic communication

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