Polarization Demultiplexing for Stokes Vector Direct Detection

Che, Di; Shieh, William

doi:10.1109/jlt.2015.2511881

Cited by 53 publications

(48 citation statements)

References 14 publications

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“…Recently, a scheme based on CD pre-compensation and training sequences (TS) is proposed in [14]. But the introduction of TS means extra payload, and more overload is required to deal with faster RSOP.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the TS-based RSOP equalizer, various adaptive equalization algorithms are also reported recently. A real-value equalizer with 3 inputs and 2 outputs has been proposed in [14] for polarization de-multiplexing, and its weights are updated through decision feedback least mean square (LMS) or recursive least square (RLS) algorithms. Besides, the Kalman filter is introduced to achieve faster convergence speed and stronger capability for RSOP tracking [13], [15], [16].…”

Section: Introductionmentioning

confidence: 99%

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Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

Jin

et al. 2020

IEEE Photonics J.

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Polarization de-multiplexing becomes challenging in Stokes vector-direct detection (SV-DD) systems, especially when the rotation of state of polarization (RSOP) and fiber chromatic dispersion (CD) are induced. To address this issue, an adaptive blind RSOP equalizer based on Stokes space is proposed. After theoretical analysis, it is found that the distribution of transmitted signals in Stokes space keeps a paraboloid. Based on this analysis, an adaptive scheme is proposed to track the symmetry axis of paraboloid for the first time. It is worth noticing that not only CD but also high-order modulation formats could not change the paraboloid distribution. Therefore, our algorithm has strong robustness to CD and good suitability for SV-DD systems with different modulation formats. In our simulation, the conventional Stokes space-based method and the training sequences (TS) method are both evaluated for comparison. The results show that our scheme can track RSOP of 20 Mrad/s and 8 Mrad/s at hard-decision forward error correction threshold in 28 Gbaud 4-level quadrature amplitude modulation (4-QAM) and 16-QAM SV-DD systems after 100 km fiber transmission, respectively. No additional computational complexity is required compared to the conventional Stokes space-based method. Moreover, compared to the TS-based method, there is no need to know the actual channel information, contributing to good flexibility.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

Jin

et al. 2020

IEEE Photonics J.

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“…Indeed, several experimental demonstrations have proved the effectiveness of SVM-DD schemes in the transmission systems [4]- [6]. These experiments, however, employed either commercial coherent receivers based on discrete optical components [4], [5], or relatively complicated silicon-photonic circuit [6]. For these schemes to be a cost-effective solution in real short-reach networks, both the transmitter and receiver need to be substantially simpler, smaller, and lower-cost as compared to coherent counterparts.…”

Section: Introductionmentioning

confidence: 99%

Compact InP Stokes-Vector Modulator and Receiver Circuits for Short-Reach Direct-Detection Optical Links

Tanemura

Nakano

2018

IEICE Trans. Electron.

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To meet the demand for continuous increase in data traffic, full usage of polarization freedom of light is becoming inevitable in the next-generation optical communication and datacenter networks. In particular, Stokes-vector modulation direct-detection (SVM-DD) formats are expected as potentially cost-effective method to transmit multi-level signals without using costly coherent transceivers in the short-reach links. For the SVM-DD formats to be practical, both the transmitter and receiver need to be substantially simpler, smaller, and lower-cost as compared to coherent counterparts. To this end, we have recently proposed and demonstrated novel SV modulator and receiver circuits realized on monolithic InP platforms. With compact non-interferometric configurations, relatively simple fabrication procedures, and compatibility with other active photonic components, the proposed devices should be attractive candidate in realizing low-cost monolithic transceivers for SVM formats. In this paper, we review our approaches as well as recent progresses and provide future prospects.

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“…Nowadays, there is a growing interest in finding alternative solutions for short reach and metro applications using Stokes vector modulation and detection [4][5][6][7][8][9][10][11] rather than unidimensional intensity modulation/ direct detection (IM/DD) system or complex coherent system. Although the concept of a Stokes vector receiver (SVR) has been described in the 1990s [12,13], SVR systems with advanced modulation formats have only been demonstrated recently.…”

Section: Introductionmentioning

confidence: 99%

“…This is at the expense of halving the spectral efficiency that can be achieved by the dual polarization coherent system. On the other hand, the SVR, which has several configurations shown in [9], has simpler receiver compared to the single polarization coherent system. The common feature in SVR configurations compared to coherent systems is that SVR does not employ a local oscillator (LO) laser with its associated thermoelectric cooler (TEC) and driving circuitry.…”

Section: Introductionmentioning

confidence: 99%

100G and 200G single carrier transmission over 2880 and 320 km using an InP IQ modulator and Stokes vector receiver

et al. 2016

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We demonstrate experimentally the transmission of single carrier 56 Gbaud 16-QAM, 8-QAM and QPSK optically modulated signals over 320, 960 and 2,880 km, respectively, using a fully packaged InP IQ modulator and a Stokes vector direct detection (SV-DD) receiver realized using discrete optics. Results show that by optimizing the carrier-to-signal-power ratio, the total throughput-times-distance product for 16 QAM and QPSK are 71,680 Gbps.km and 322,560 Gbps.km, respectively, at bit error rate (BER) below the hard decision forward error correcting threshold (HD-FEC) of 4.5 × 10^-3.

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Polarization Demultiplexing for Stokes Vector Direct Detection

Cited by 53 publications

References 14 publications

Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

Compact InP Stokes-Vector Modulator and Receiver Circuits for Short-Reach Direct-Detection Optical Links

100G and 200G single carrier transmission over 2880 and 320 km using an InP IQ modulator and Stokes vector receiver

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