Straight-Line Dual-Polarization PSK Transmitter with Polarization Differential Modulation

Shota ISHIMURA; Kosuke NISHIMURA; Yoshiaki NAKANO; Takuo TANEMURA

doi:10.1587/transcom.2020EBP3124

Straight-Line Dual-Polarization PSK Transmitter with Polarization Differential Modulation

Shota ISHIMURA, Kosuke NISHIMURA, Yoshiaki NAKANO, Takuo TANEMURA

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Summary :

Coherent transceivers are now regarded as promising candidates for upgrading the current 400Gigabit Ethernet (400GbE) transceivers to 800G. However, due to the complicated structure of a dual-polarization IQ modulator (DP-IQM) with its bulky polarization-beam splitter/comber (PBS/PBC), the increase in the transmitter size and cost is inevitable. In this paper, we propose a compact PBS/PBC-free transmitter structure with a straight-line configuration. By using the concept of polarization differential modulation, the proposed transmitter is capable of generating a DP phase-shift-keyed (DP-PSK) signal, which makes it directly applicable to the current coherent systems. A detailed analysis of the system performance reveals that the imperfect equalization and the bandwidth limitation at the receiver are the dominant penalty factors. Although such a penalty is usually unacceptable in long-haul applications, the proposed transmitter can be attractive due to its significant simplicity and compactness for short-reach applications, where the cost and the footprint are the primary concerns.

Publication: IEICE TRANSACTIONS on Communications Vol.E104-B No.5 pp.490-496

Publication Date: 2021/05/01

Publicized: 2020/10/27

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2020EBP3124

Type of Manuscript: PAPER

Category: Fiber-Optic Transmission for Communications

Authors

Shota ISHIMURA
  The University of Tokyo,KDDI Research, Inc.
Kosuke NISHIMURA
  KDDI Research, Inc.
Yoshiaki NAKANO
  The University of Tokyo
Takuo TANEMURA
  The University of Tokyo

Keyword

coherent optical communications, digital signal processing, dual-polarization modulator

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Shota ISHIMURA, Kosuke NISHIMURA, Yoshiaki NAKANO, Takuo TANEMURA, "Straight-Line Dual-Polarization PSK Transmitter with Polarization Differential Modulation" in IEICE TRANSACTIONS on Communications, vol. E104-B, no. 5, pp. 490-496, May 2021, doi: 10.1587/transcom.2020EBP3124.
Abstract: Coherent transceivers are now regarded as promising candidates for upgrading the current 400Gigabit Ethernet (400GbE) transceivers to 800G. However, due to the complicated structure of a dual-polarization IQ modulator (DP-IQM) with its bulky polarization-beam splitter/comber (PBS/PBC), the increase in the transmitter size and cost is inevitable. In this paper, we propose a compact PBS/PBC-free transmitter structure with a straight-line configuration. By using the concept of polarization differential modulation, the proposed transmitter is capable of generating a DP phase-shift-keyed (DP-PSK) signal, which makes it directly applicable to the current coherent systems. A detailed analysis of the system performance reveals that the imperfect equalization and the bandwidth limitation at the receiver are the dominant penalty factors. Although such a penalty is usually unacceptable in long-haul applications, the proposed transmitter can be attractive due to its significant simplicity and compactness for short-reach applications, where the cost and the footprint are the primary concerns.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2020EBP3124/_p

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@ARTICLE{e104-b_5_490,
author={Shota ISHIMURA, Kosuke NISHIMURA, Yoshiaki NAKANO, Takuo TANEMURA, },
journal={IEICE TRANSACTIONS on Communications},
title={Straight-Line Dual-Polarization PSK Transmitter with Polarization Differential Modulation},
year={2021},
volume={E104-B},
number={5},
pages={490-496},
abstract={Coherent transceivers are now regarded as promising candidates for upgrading the current 400Gigabit Ethernet (400GbE) transceivers to 800G. However, due to the complicated structure of a dual-polarization IQ modulator (DP-IQM) with its bulky polarization-beam splitter/comber (PBS/PBC), the increase in the transmitter size and cost is inevitable. In this paper, we propose a compact PBS/PBC-free transmitter structure with a straight-line configuration. By using the concept of polarization differential modulation, the proposed transmitter is capable of generating a DP phase-shift-keyed (DP-PSK) signal, which makes it directly applicable to the current coherent systems. A detailed analysis of the system performance reveals that the imperfect equalization and the bandwidth limitation at the receiver are the dominant penalty factors. Although such a penalty is usually unacceptable in long-haul applications, the proposed transmitter can be attractive due to its significant simplicity and compactness for short-reach applications, where the cost and the footprint are the primary concerns.},
keywords={},
doi={10.1587/transcom.2020EBP3124},
ISSN={1745-1345},
month={May},}

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TY - JOUR
TI - Straight-Line Dual-Polarization PSK Transmitter with Polarization Differential Modulation
T2 - IEICE TRANSACTIONS on Communications
SP - 490
EP - 496
AU - Shota ISHIMURA
AU - Kosuke NISHIMURA
AU - Yoshiaki NAKANO
AU - Takuo TANEMURA
PY - 2021
DO - 10.1587/transcom.2020EBP3124
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E104-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2021
AB - Coherent transceivers are now regarded as promising candidates for upgrading the current 400Gigabit Ethernet (400GbE) transceivers to 800G. However, due to the complicated structure of a dual-polarization IQ modulator (DP-IQM) with its bulky polarization-beam splitter/comber (PBS/PBC), the increase in the transmitter size and cost is inevitable. In this paper, we propose a compact PBS/PBC-free transmitter structure with a straight-line configuration. By using the concept of polarization differential modulation, the proposed transmitter is capable of generating a DP phase-shift-keyed (DP-PSK) signal, which makes it directly applicable to the current coherent systems. A detailed analysis of the system performance reveals that the imperfect equalization and the bandwidth limitation at the receiver are the dominant penalty factors. Although such a penalty is usually unacceptable in long-haul applications, the proposed transmitter can be attractive due to its significant simplicity and compactness for short-reach applications, where the cost and the footprint are the primary concerns.
ER -