400 Gb/s free space optical communication (FSOC) system using OAM multiplexing and PDM-QPSK with DSP

Kaur, Simarpreet; Sachdeva, Shippu; Sindhwani, Manoj

doi:10.1515/joc-2022-0111

Cited by 10 publications

(2 citation statements)

References 20 publications

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“…In 2022, an OTC system at 40 Gbps is reported using NRZ, RZ, and alternate mark inversion (AMI) modulation employing LG00, LG130, LG400, and LG800 OAM beams [ 50 ]. The results revealed that NRZ performed best in terms of BER, and the further research conducted in [ 51 ], NRZ was replaced with PDM-QPSK, and it was seen that the data rate supportability increased 10 times, i.e., 400 Gbps. In OWC systems, OAM beams are not investigated widely and are either limited to theoretical proposals [ 52 ] or restricted to lower earth orbit (LEO) based communications [ 53 ].…”

Section: Introductionmentioning

confidence: 95%

Ultra-High Capacity Optical Satellite Communication System Using PDM-256-QAM and Optical Angular Momentum Beams

Sachdeva

Kaur

Arora

et al. 2023

Sensors

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Twisted light beams such as optical angular momentum (OAM) with numerous possible orthogonal states have drawn the prodigious contemplation of researchers. OAM multiplexing is a futuristic multi-access technique that has not been scrutinized for optical satellite communication (OSC) systems thus far, and it opens up a new window for ultra-high-capacity systems. This paper presents the 4.8 Tbps (5 wavelengths × 3 OAM beams × 320 Gbps) ultra-high capacity OSC system by incorporating polarization division multiplexed (PDM) 256-Quadrature amplitude modulation (256-QAM) and OAM beams. To realize OAM multiplexing, Laguerre Gaussian (LG) transverse mode profiles such as LG00, LG140, and LG400 were used in the proposed study. The effects of the receiver’s digital signal processing (DSP) module were also investigated, and performance improvement was observed using DSP for its potential to compensate for the effects of dispersion, phase errors, and nonlinear effects using the blind phase search (BPS), Viterbi phase estimation (VPE), and the constant modulus algorithm (CMA). The results revealed that the proposed OAM-OSC system successfully covered the 22,000 km OSC link distance and, out of three OAM beams, fundamental mode LG00 offered excellent performance. Further, a detailed comparison of the proposed system and reported state-of-the-art schemes was performed.

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Section: Introductionmentioning

confidence: 95%

Ultra-High Capacity Optical Satellite Communication System Using PDM-256-QAM and Optical Angular Momentum Beams

Sachdeva

Kaur

Arora

et al. 2023

Sensors

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“…However, due to noisy environments, system performance decreases, leading to overall system failure 19 . With a single FSO connection, the system's performance is enhanced since more channels can be used within a given amount of space because each carrier has its own wavelength or channel 20 . However, these models cannot improve connection capacity, system capability, and user consistency due to unforeseen atmospheric attenuation.…”

Section: Introductionmentioning

confidence: 99%

An integrated design for improving spectral efficiency of FSO communication system in 6G applications

Sathish,

Mahalingam,

Padmaja

et al. 2024

Int J Communication

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SummaryIn the case of future access networks, such as 6G‐based applications, the free‐space optical communication (FSO) technology is an efficient solution. FSO in 6G is extremely popular because of its unique properties, which include ease of installation, high bandwidth, high security, license‐free long range, and interference resistance. However, environmental disturbances have a negative impact on the FSO system's functioning. Because of these atmospheric turbulences, the optical information gets restricted, which in turn reduces the link reliability, power density, and distance. This paper proposes a hybrid FSO strategy for improving system efficiency to address these problems. Signal creation is fundamental to every successful communication system. The FSO system consists of three components: the transmitter, the channel medium, and the receiver. The transmitter section includes a continuous wave laser, a Mach–Zehnder modulator, a nonreturn to zero transpose Walsh code generator, and a nonreturn to zero pulse generator. Wavelength division multiplexing‐optical code division multiple access‐spectrum slicing (WDM‐OCDMA‐SS) is used to facilitate efficient data transfer after signals have been generated by alternate mark inversion (AMI). In order to boost a weak signal, fused Raman erbium amplifiers (Fuse‐RE) are used. Q factor and log bit error rate (BER) are used to assess the performance of the suggested approach. The proposed model has obtained a log BER of −15.3291 for clear air and a Q factor of 8.2922, whereas the performances are implemented using Python. The proposed approach achieves better performance when compared to the existing methodologies.

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Simulation of an ultrahigh capacity free space optical (FSO) communication system incorporating hybrid WDM-CPDM techniques under disturbed weather

Sachdeva

Kaur

Arora

et al. 2023

J Opt

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400 Gb/s free space optical communication (FSOC) system using OAM multiplexing and PDM-QPSK with DSP

Cited by 10 publications

References 20 publications

Ultra-High Capacity Optical Satellite Communication System Using PDM-256-QAM and Optical Angular Momentum Beams

Ultra-High Capacity Optical Satellite Communication System Using PDM-256-QAM and Optical Angular Momentum Beams

An integrated design for improving spectral efficiency of FSO communication system in 6G applications

Simulation of an ultrahigh capacity free space optical (FSO) communication system incorporating hybrid WDM-CPDM techniques under disturbed weather

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