Optical millimeter wave mode division multiplexing of LG and HG modes for OFDM Ro-FSO system

Amphawan, Angela; Chaudhary, Sushank; Chan, Vincent W. S.

doi:10.1016/j.optcom.2018.07.054

Cited by 47 publications

(18 citation statements)

References 52 publications

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“…So the influence of the atmospheric turbulence can be treated as two independent parts which is the intensity fluctuations and the phase fluctuations. Since the atmospheric scintillation is the main factor that influences the propagation of OFDM signals in atmospheric turbulence [6]. When the OAM beams propagate in the atmospheric turbulence of weak fluctuation conditions, the effect of atmospheric scintillation on the OAM beams can be neglected [29].…”

Section: Phase Distortion Model Of Oam-ofdmmentioning

confidence: 99%

“…But the effect of the atmospheric turbulence on the OAM-OFDM signals is not considered in [2]. However, not only the OAM signals are affected by atmospheric turbulence but also the OFDM signals are affected by atmospheric turbulence during propagation [3]- [6], which in return affects the capacity of the OAM-OFDM wireless communication system. Hence, it is a key issue for enhancing the capacity of the OAM-OFDM wireless communication system in consideration of the atmospheric turbulence effect.…”

Section: Introductionmentioning

confidence: 99%

“…Djordjevi and the co-authors investigated the low-density parity-check (LDPC) coded OFDM over atmospheric turbulence channels in optical frequency bands and found that the bit error ratio (BER) and spectral efficiency of LDPC coded OFDM outperformed that of the LDPC coded on-off keying (OKK) in wireless communication systems [5]. For the millimeter wave OFDM systems in atmospheric turbulence, the Gamma-Gamma distribution was adopted to model the OFDM signals [6].…”

Section: Introductionmentioning

confidence: 99%

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Capacity Modelling and Performance Analysis of OAM-OFDM Wireless Communication Systems

Xiong

et al. 2020

IEEE Access

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The Orbital Angular Momentum (OAM) wireless communication technology has received much attention in recent years for its natural orthogonality between different OAM states. Combining the OAM technology with the Orthogonal Frequency Division Multiplexing (OFDM) technology, we proposed a new OAM-OFDM wireless communication system to explore a new approach for enhancing the transmission capacity of the wireless communication system. Atmospheric turbulence is an important factor for influencing the capacity of the OAM-OFDM wireless communication system. In consideration of the effect of the atmospheric turbulence, we derived a crosstalk model of the proposed OAM-OFDM wireless communication system. Furthermore, a capacity model of the OAM-OFDM wireless communication system is proposed in consideration of the effect of atmospheric turbulence on both the OAM and OFDM signals. Compared with the conventional OAM wireless communication system, the capacity performance of the proposed OAM-OFDM wireless communication system is significantly improved and the average improvement is 751%. INDEX TERMS Orbital angular momentum, capacity, bit error ratio, orthogonal frequency division multiplexing.

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Section: Phase Distortion Model Of Oam-ofdmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Capacity Modelling and Performance Analysis of OAM-OFDM Wireless Communication Systems

Xiong

et al. 2020

IEEE Access

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“…33 Chaudhary et al, 34 reports the successful transmission of 120 Gbps information in a hybrid MDM-WDM Ro-FSO system using LG modes over an FSO link range of 80 km under strong atmospheric conditions. Amphawan et al, 35 reports the effective transmission of 80 Gbps to 160 GHz information over 50 km FSO link under the varying fog levels using LG and HG modes. Vijayakumari and Sumathi, 36 reports successful transmission of 200 Gbps data over 1700 m FSO link range under underwater conditions using linearly polarized beams.…”

Section: Introductionmentioning

confidence: 99%

“…51 LG beams as unique information carriers are selected to enhance the degree of freedom for transmitting signals and data encoding in both the amplitude and phase that provides more reliability to the system under severe atmospheric turbulence. 35 Despite the rapid improvement of the architecture design of PON in MDM-based hybrid PON/FSO systems, PON architecture is still a relatively uncovered domain in the recent next-generation access networks. Only limited literature work has been devoted to NG-PON2 based systems, especially for long-reach MDM-based hybrid TWDM-PON/FSO systems.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of long‐reach 40/40 Gbps mode division multiplexing‐based hybrid time and wavelength division multiplexing passive optical network/free‐space optics using Gamma‐Gamma fading model with pointing error under different weather conditions

Kumari

Sharma

Sheetal

2021

Trans Emerging Tel Tech

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Time and wavelength division multiplexing passive optical network (TWDM-PON) is adopted across the globe and is considered as the most remarkable trend of the next-generation solution to serve exponential traffic growth for fifth-generation (5G) network. In the interest of achieving 5G network requirements, we propose a mode division multiplexing (MDM) based bidirectional 40/40 Gbps hybrid TWDM-PON and free-space optics (FSO) system. The system performance is analyzed for bidirectional hybrid fiber/FSO channels incorporating four distinct Laguerre-Gaussian (LG00, LG01, LG11, and LG21) spatial modes for variable fiber (10-155 km)/FSO (10-1000 m) link ranges and different receiver aperture diameters (20 μm-60 cm). Based on Gamma-Gamma (GG) modeled FSO channels using Laguerre Gaussian modes, bit error rate (BER) performance of the system is numerically investigated under the impact of dynamic atmospheric weather conditions, weak-to-strong turbulence conditions, pointing errors, and geometric loss (GL) at an acceptable BER of 10 −9. In addition, to support the numerical analysis, the simulation results exhibit that the hybrid fiber/FSO LG00 signals over 1000 m FSO and 155 km fiber link ranges are successfully transmitted in the system with 40 μm spatial and 60 cm FSO receiver aperture diameters under the impact of strong turbulence, atmospheric attenuation of 0.2 dB/km and noise. Moreover, the performance comparison of the MDM-based hybrid TWDM-PON/FSO with the previous latest literature works reveals a superior system performance under practical environment conditions. The proposed work can be utilized to realize longreach, bandwidth-efficient, high-capacity, and high-speed data transmission links.

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Broadband Petal‐Like Raman Laser

2022

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High-order Laguerre-Gaussian (LG 0,n ) petal-like lasers are extremely important for manipulating microparticles, creating 3D optical trapping structures, and free space optical communication. However, it is difficult to expand the wavelength of LG 0,n petal-like lasers owing to the narrow fluorescence spectrum of laser gain media. Here, a Raman laser constructed with a Yb 3+ :Y 3 Al 5 O 12 (Yb:YAG) crystal and a yttrium vanadate (YVO 4 ) is demonstrated for achieving a high-order LG 0,n petal-like laser with broadband laser wavelength and high beam quality. High-order LG 0,n petal-like lasers with n tunable from 3 to 11 are obtained. The LG 0,11 petal-like Raman laser oscillates from 1075.4 to 1088.7 nm with 44 longitudinal modes, and the bandwidth of the Raman laser is 13.3 nm. The output power of the LG 0,11 petal-like Raman laser is 126 mW with an optical efficiency of 1.5%. High-order LG 0,n petal-like Raman lasers with tunable n provide flexible choices for potential applications in manipulating microparticles and biological molecules.

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Optical millimeter wave mode division multiplexing of LG and HG modes for OFDM Ro-FSO system

Cited by 47 publications

References 52 publications

Capacity Modelling and Performance Analysis of OAM-OFDM Wireless Communication Systems

Capacity Modelling and Performance Analysis of OAM-OFDM Wireless Communication Systems

Performance analysis of long‐reach 40/40 Gbps mode division multiplexing‐based hybrid time and wavelength division multiplexing passive optical network/free‐space optics using Gamma‐Gamma fading model with pointing error under different weather conditions

Broadband Petal‐Like Raman Laser

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