The wavelength-division-multiplexed passive optical network (WDM-PON) is considered to be the next evolutionary solution for a simplified and future-proofed access system that can accommodate exponential traffic growth bandwidth-hungry new applications. WDM-PON mitigates complicated time-sharing power budget issues in time-division-multiplexed PON (TDM-PON) by providing virtual point-to-point connectivity multiple end users through dedicated pair of wavelengths. There are few hurdles...

Record capacity transmission of 101.7-Tb/s (370×294-Gb/s) is performed over 3×55 km SSMF using PDM-128QAM-OFDM modulation and pilot-based phase noise mitigation. Achieved spectral efficiency 11 bits/s/Hz the highest reported to date for WDM transmission.

We have proposed and experimentally demonstrated a novel architecture for orthogonal frequency-division- multiplexing (OFDM) wavelength-division-multiplexing passive optical network with centralized lightwave. In this architecture, 16 quadrature amplitude modulation intensity-modulated OFDM signals at 10 Gb/s are utilized downstream transmission. A wavelength-reuse scheme is employed to carry the upstream data reduce cost unit. By using one intensity modulator, signal remodulated on-off...

Next-generation optical access networks are envisioned to evolve into a converged, high-speed, multiservice platform supporting residential, business, mobile backhaul, and special purpose applications. Moreover, bandwidth demand projections suggest that terabit aggregate capacity may need be reached in such next-generation passive (PON). To satisfy these requirements while leveraging the large investments made existing fiber plants, wavelength division multiplexed (WDM)-based long-reach PON...

We report the successful transmission of 64 Tb/s capacity (640 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\,\times\,$</tex></formula> 107 Gb/s with 12.5 GHz channel spacing) over 320 km reach utilizing 8-THz spectrum in Notation="TeX">${\rm C}+{\rm L}$</tex> </formula> -bands at a net spectral efficiency 8 bit/s/Hz. Such result is accomplished by use raised-cosine pulse-shaped PDM-36QAM...

To the best of our knowledge, we present first field trial distributed fiber optical sensing (DFOS) and high-speed communication, comprising a coexisting system, over an operation telecom network. Using probabilistic-shaped (PS) DP-144QAM, 36.8 Tb/s with 8.28-b/s/Hz spectral efficiency (SE) (48-Gbaud channels, 50-GHz channel spacing) was achieved. Employing DFOS technology, road traffic, i.e., vehicle speed density, were sensed 98.5% 94.5% accuracies, respectively, as compared to video...

The broadband penetration and continuing growth of Internet traffic among residential business customers are driving the migration today's end user's network access from cable to optical fiber superbroadband wireless systems integration operating at much higher carrier frequencies in millimeter-wave (mm-wave) range is considered be one most promising solutions for increasing existing capacity mobility, as well decreasing costs next-generation networks. In this paper, several key enabling...

We experimentally demonstrate 101.7-Tb/s transmission over 355 km spans of standard single-mode fiber (SSMF) at a net spectral efficiency 11 b/s/Hz. A total 370 dense wavelength-division multiplexed (DWDM) channels spanning the optical C- and L-bands spaced 25 GHz were used. Each 25-GHz channel subdivided into four subbands, with each subband carrying 73.5-Gb/s orthogonal frequency-division (OFDM) signal modulated polarization-division-multiplexing (PDM) 128-ary quadrature amplitude...

Distributed fiber optic sensing (DFOS) is a rapidly evolving field that allows the existing optical infrastructure for telecommunications to be reused wide-area sensing. Using backscattering mechanisms of glass—which includes Rayleigh, Brillouin, and Raman backscatter—it possible realize distributed vibration temperature sensors with good sensitivity at every position, spatial resolution determined by bandwidth interrogation signal. In this paper, we will review main technologies in...

We demonstrate a vibration detection and localization scheme based on bidirectional transmission of telecom signals with digital coherent at the receivers. Optical phase is extracted from signal processing blocks receiver, which component by bandpass filtering, position along cable closest to vibration's epicenter recovered correlation. our first using offline experiment 200-Gb/s DP-16QAM, we report field trial results over installed fiber detect real-world events.

We review recent advances in distributed fiber optic sensing (DFOS) and their applications. The scattering mechanisms glass, which are exploited for reflectometry-based DFOS, Rayleigh, Brillouin, Raman scatterings. These sensitive to either strain and/or temperature, allowing optical cables monitor ambient environment addition conventional role as a medium telecommunications. Recently, DFOS leveraged technologies developed telecommunications, such coherent detection, digital signal...

We review various applications of distributed fiber optic sensing (DFOS) and machine learning (ML) technologies that particularly benefit telecom operators' networks businesses. By leveraging relative phase shift the reflectance coherent Rayleigh, Brillouin Raman scattering light wave, ambient environmental vibration, acoustic effects, temperature fiber/cable strain can be detected. Fiber technology allows optical to support features in addition its conventional role transmit data...

We have proposed and experimentally demonstrated a novel scheme to generate optical millimeter-wave (mm-wave) signals by using single-sideband modulation with low-frequency local oscillator (LO) signals. In this architecture, incorporating the proper dc bias of modulator in central office, mm-wave carriers are generated two times frequency LO signal while largely reducing bandwidth requirement modulator. quantify carrier-to-sideband ratio (CSR) downstream transmission radio-over-fiber (ROF)...

Few-mode fibers (FMFs) are used for the first time to transmit over 5000 km. Ten WDM channels with 50GHz channel spacing at 112 Gb/s per using PDM-QPSK launched into fundamental mode of FMFs by splicing single-mode directly FMFs. Even though few-mode can support an additional spatial LP(11) 1550 nm, signal remains in and does not experience coupling throughout fiber transmission. After each span is collected a second which also spliced FMF. Span loss compensated EDFAs before it next FMF...

We report the results of two field trials aimed at achieving high fiber capacity over regional and long-haul distances. In first trial, 41 superchannels with digital Nyquist pulse-shaping were generated tightly packed to fill up both C-band L-band. Each subcarrier was modulated 24.8-Gbaud dual-polarization 16 quadrature amplitude modulation (DP-16QAM) data. The signal carrying net 54.2 Tb/s data transmitted 634 km dispersion uncompensated field-installed standard single mode aid hybrid EDFA...

For the first time, we demonstrate detection of vehicle speed, density, and road conditions using deployed fiber carrying high-speed data transmission, prove carriers' large-scale infrastructures can also be used as ubiquitous sensing networks.

In this paper, we propose a novel synthesizing method for high-speed 8-ary quadratic-amplitude modulation (QAM) optical signal generation using commercial modulators with binary electrical driving signals. Using method, successfully generated 114-Gb/s pulse-duration (PDM)-8QAM Intradyne detection of PDM-8QAM signals robust blind polarization demultiplexing has been demonstrated by new cascaded multimodulus equalization algorithm. With return-to-zero-shaped and the proposed algorithm,...

We have generated 4 x 100-Gb/s orthogonal WDM optical signal by employing polarization-division-multiplexed (PDM) return-to-zero (RZ) QPSK modulation format and tight filtering technique. The required signal-to-noise ratio (OSNR) at bit error (BER) of 2 10(-3) for the 400 Gb/s DWDM is measured to be approximately 22.8 dB/0.1 nm. After transmission over 1040-km standard single mode fiber (EDFA-only amplification, 80-km amplifier span fully receiver-side electrical dispersion compensation),...

Employing raised-cosine pulse-shaped PDM-36QAM modulation and both pre- post-transmission digital equalization, we demonstrate 12.5GHz-spaced, 640×107Gbits/s DWDM transmission over 4×80km of ultra-large-area fiber with a record capacity 64Tb/s at 8b/s/Hz spectral efficiency.

We experimentally demonstrated a novel lightwave centralized hybrid bidirectional access network for integration of wavelength-division-multiplexing orthogonal frequency-division multiplexing passive optical (WDM-OFDM-PON) with radio-over-fiber systems employing multiwavelength generation and the carrier-reuse technique. In this proposed architecture, one main impairments transmission over single fiber link, Rayleigh backscattering, can be reduced, because different frequencies downlinks...

Record capacity transmission of 101.7-Tb/s (370×294-Gb/s) is performed over 3×55 km SSMF using PDM-128QAM-OFDM modulation and pilot-based phase noise mitigation. Achieved spectral efficiency 11 bits/s/Hz the highest reported to date for WDM transmission.

We report the first distributed acoustic sensing (DAS) experiment with over >1,000 km reach on a hybrid link comprising of mixture field and lab fibers bi-directional inline Raman amplification after each span. used 20× frequency-diversity chirped-pulses for probe signal, recovered Rayleigh backscatter using coherent receiver correlation detection diversity combining. A measurand resolution ∼100 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Highlights A mobile robot was designed to autonomously cruise in typical commercial chicken farms Taiwan. The localization of the reached a mean absolute error 0.17 m. automatically monitored open-mouth behavior chickens. trained YOLO v7 model achieved an AP 86.1% detection chickens with behavior. analysis indicates that ratio correlated ambient temperature. Abstract. In conventional management floor-rearing farms, farmers regularly patrol observe status and check environment. For countries...

We investigate 40-Gb/s cost-efficient transmitter for access and metro networks. This comprises a standard directly modulated distributed-feedback (DFB) laser subsequent optical filter. Large dispersion tolerance of this is realized by chirp control through the phase correlation between adjacent bits destructive interference in order to erase power ldquo0rdquo while enhancing extinction ratio. The model DFB optimum parameters filter have been numerically analyzed. chirp-managed 42.8-Gb/s...

We propose a novel scheme of Rayleigh backscattering noise-eliminated, long-reach, single-fiber, full-duplex, centralized wavelength-division multiplexed passive optical network with differential quadrature phase-shift keying (DPSK) downstream and remodulated upstream using an carrier-suppressed subcarrier-modulation (OCS-SCM) technique interleaver. The error-free transmissions 10-Gb/s 2.5-Gb/s signals are experimentally demonstrated over 115-km single-fiber bidirectional SMF-28 less than...