Опубликована: Июль 26, 2024
Язык: Английский
Optical Fiber Technology, Год журнала: 2024, Номер 86, С. 103837 - 103837
Опубликована: Май 22, 2024
Язык: Английский
Процитировано
2
IEEE Photonics Technology Letters, Год журнала: 2024, Номер 36(10), С. 633 - 636
Опубликована: Апрель 5, 2024
A simple single-polarization heterodyne optical network unit (ONU) receiver with Alamouti-coding based polarization diversity at the line terminal (OLT) side is a promising solution for passive networks (PON) beyond 50 Gbps. The special equalizer required data recovery of such system has been demonstrated 200 Gbps PON downstream using offline processing serial data. In this letter, we extended implementation parallel that real-time implementation. proof-of-concept experiment transmission to show effectiveness proposed digital signal proccesing (DSP). impact phase noise and limitation degree parallelism are further investigated via numerical simulations.
Язык: Английский
Процитировано
1
Optics Express, Год журнала: 2024, Номер 32(20), С. 35483 - 35483
Опубликована: Сен. 10, 2024
As high-speed optical access networks continue to evolve, reducing the computational complexity at network unit (ONU) side remains a significant challenge in coherent passive (PON). This paper presents pre-equalization scheme that integrates digital pre-distortion (DPD) and pre-emphasis techniques 200 Gb/s PON. The focus is on three modulation formats: 50 Gbaud polarization multiplexing-quadrature phase shift keying (PM-QPSK), Alamouti-coded multiplexing-16 quadrature amplitude (PM-16QAM), 25 PM-16QAM, using intradyne or heterodyne detection schemes. Through comprehensive numerical simulations experimental evaluations, we demonstrate improvements receiver sensitivity power budget When number of filtering taps small, proposed achieves enhancements 3 dB for PM-QPSK, 7 2.1 PM-16QAM downlink. These findings highlight potential enhancing performance next-generation PON with low ONU side.
Язык: Английский
Процитировано
1
Optics Communications, Год журнала: 2024, Номер unknown, С. 131126 - 131126
Опубликована: Сен. 1, 2024
Язык: Английский
Процитировано
1
Optics Express, Год журнала: 2024, Номер 32(22), С. 39384 - 39384
Опубликована: Окт. 8, 2024
In this paper, we experimentally investigate the laser phase noise tolerance for a 100 Gb/s/ λ coherent passive optical network (PON) with simplified units (ONUs) transceivers when distributed feedback (DFB) is used as local oscillator (LO). proposed scheme, digitally subcarrier-multiplexed (DSCM) signals are generated in transmitter at line terminal (OLT) side based on Alamouti encoding two polarizations and received by single-polarization heterodyne receiver ONU side. The experimental results show that power budget can achieve 34.2 dB 33.9 after 25 km standard single-mode fiber (SSMF) link external cavity (ECL) DFB lasers LOs Polarization carrier tracking schemes DSCM systems frequency domain pilot tones were digital signal process (DSP). At same time, offset estimation compensation algorithms conducted using residual carriers. By choosing an appropriate width low-pass filter, optimal performance be achieved. pre-equalization operation OLT also verified to provide better flatter performances.
Язык: Английский
Процитировано
1
Опубликована: Март 18, 2024
For the upstream passive optical network (PON), we design and evaluate an intensity modulation quaternary pulse amplitude (PAM-4) with four coherent receivers in terms of Homodyne balanced detection polarization multiplexing. The obtained simulation results validate 100Gbps PAM-PON scheme successful transmission over C-band standard single mode fiber.
Язык: Английский
Процитировано
0
Journal of Lightwave Technology, Год журнала: 2024, Номер 42(15), С. 5156 - 5166
Опубликована: Апрель 16, 2024
Coherent
point-to-
multi-point
(PtMP)
optical
network
based
on
digital
subcarrier
multiplexing
(DSCM)
has
been
a
promising
technology
for
metro
and
access
networks
to
achieve
cost
savings,
low
latency,
high
flexibility.
In-phase
quadrature
(IQ)
impairments
of
the
coherent
transceiver
(e.g.
IQ
skew
power
imbalance)
cause
severe
performance
degradation.
In
DSCM-based
PtMP
networks,
it
is
hard
realize
far-end
IQ-impairments
estimation
hub
transmitter
because
leaf
one
cannot
acquire
signal
symmetrical
subcarrier.
this
paper,
we
propose
specially
designed
time-and-frequency
interleaving
tones
(TFITs),
which
can
simultaneously
estimate
skews
imbalances
receiver
at
an
individual
leaf.
The
feasibility
TFITs-based
experimentally
verified
by
setting
up
8Gbaud/SCx4SCs
network.
experimental
results
depict
that
absolute
errors
in
estimated
imbalance
are
within
Язык: Английский
Процитировано
0
Optical Fiber Communication Conference (OFC) 2022, Год журнала: 2024, Номер unknown, С. Th4C.1 - Th4C.1
Опубликована: Янв. 1, 2024
We demonstrate the first 200-G O-band coherent PON using a heterogeneously-integrated SiP PIC transmitter as an OLT and PIC/EIC receivers ONUs. A joint DSCM NOMA scheme is presented for flexibly dense access scenarios.
Язык: Английский
Процитировано
0
Optics Communications, Год журнала: 2024, Номер 566, С. 130723 - 130723
Опубликована: Май 23, 2024
Язык: Английский
Процитировано
0
Optics & Laser Technology, Год журнала: 2024, Номер 179, С. 111354 - 111354
Опубликована: Июль 3, 2024
Язык: Английский
Процитировано
0