A full-duplex WDM hybrid fiber-wired/fiber-wireless/fiber-VLC/fiber-IVLC transmission system based on a self-injection locked quantum dash laser and a RSOA

Mandal, Gour Chandra; Mukherjee, Rahul; Das, Binoy; Patra, Ardhendu Sekhar

doi:10.1016/j.optcom.2018.06.048

Cited by 58 publications

(19 citation statements)

References 24 publications

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“…10(b). As a performance metric for measuring the distortion in the received constellation, Error Vector Magnitude (EVM) is calculated similar to the approach in [17]. EVM over a Ax-PAM symbol is calculated by Root Mean Square (RMS) value of the magnitudes obtained by subtracting received constellations from the corresponding ideal constellation.…”

Section: Resultsmentioning

confidence: 99%

A Tunable Energy Signal for Intensity Modulation and Direct Detection Systems: Theory, Simulations, and Experiments

et al. 2020

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In this paper, we propose a novel method to generate real signal for Visible Light Communication (VLC) systems without using traditional hermitian symmetry on the data symbols obtained using M-ary Pulse Amplitude Modulation (PAM) which is named as Auxiliary PAM (Ax-PAM). We mathematically analyse this method to generate a real signal with tunable energy using auxiliary symbols at the transmitter and the corresponding receiver. Simulation results for Bit Error Rate (BER) show better performance over conventional PAM Discrete Multi-Tone (PAM-DMT) and Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (ACO-OFDM) even under clipping distortion and also demonstrate the tunable energy for the proposed scheme. Furthermore, the proposed scheme is implemented on a VLC test bed designed using Universal Software defined Radio Peripheral (USRP). The experimental results for estimated Signal to Noise Ratio (SNR) and achieved BER for Ax-PAM outperforms PAM-DMT and ACO-OFDM.

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Section: Resultsmentioning

confidence: 99%

A Tunable Energy Signal for Intensity Modulation and Direct Detection Systems: Theory, Simulations, and Experiments

et al. 2020

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“…In (Mallick et al 2018), a bidirectional wireless-overfiber based on OFDM employing polarization multiplexing technique at 10 Gbps along with 6.25 Gbps for OFDM downlink transmission and 5 Gbps along with 2.5 Gbps OFDM uplink transmission over 50 km fiber along with 10 m downstream and 5 m upstream wireless links is successfully demonstrated. In (Mandal et al 2018) a bidirectional WDM hybrid fiber-wireless/fiber-wired/fiber-VLC/fiber-invisible VLC (IVLC) at 10 Gbps/50GHz milimeter wave (MMW), 10 Gbps/100 GHz MMW over 50 km fiber along with 10 m RF and 40 m optical wireless link in downstream transmission is demonstrated. Also, the upstream data at 2.5 Gbps is transmitted over 50 km fiber and 10 m free-space transmission link successfully.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

2021

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In this work, a full-duplex time and wavelength division multiplexing-passive optical network (TWDM-PON) system is analysed. Orthogonal frequency division multiplexing (OFDM) with m-quadrature amplitude modulation (m-QAM) is employed to improve the performance of TWDM-PON for downstream and upstream transmission. Simultaneously, multi-color (390-750 nm) laser diodes (LDs) are employed for visible light communication (VLC) using various VLC links to encourage the information rate of fiber/VLC optical network. A TWDM-PON utilizing 16-, 32-and 64-QAM OFDM with ten LDs based VLC system has been analysed for full-duplex multi-color VLC signals of the system. The impact of the LDs input current and high transmission rate in the proposed PON/VLC link has been investigated for m-QAM OFDM modulation. The results show that the 40/40 Gbps 16-, 32-and 64-QAM signals over ten 8000 m VLC links and a 50 km fiber link are successfully transmitted at the modulation input current of 9 mA under bit error rate (BER) of 3.8×10 -3 .Also, the proposed system employing 16-, 32-and 64-QAM signals over a 10 km fiber and ten 10 m VLC links provide the maximum transmission rate of 120, 100 and 80 Gbps respectively. Moreover, the measured error vector magnitudes (EVMs) and calculated BER values for 16-QAM downstream and upstream signals, are well below the required FEC limit than high-order modulation formats. Further, the numerical analysis of the proposed system reveals the superiority of the proposed fiber/VLC links.

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“…Fast deployment of wavelength division multiplexing (WDM) and dense WDM (DWDM) technologies in optical fiber transmission networks [1][2][3][4] have faced many severe challenges to implementing new reconfigurable edge node architectures for fiber network access. The next-generation of infrastructure for an optical access network requires many essential features for high-speed data transmission.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Optical Wavelength Switch Based on LCoS-SLM for Edge Node of Optical Access Network

Chou

Chen

2021

IEEE Photonics J.

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A novel design of optical wavelength switch, based on an asymmetric switching architecture for edge node implementation, is presented in this paper. Compared to previous research for optical core transport network applications, the proposed work has a unique aspect to build dynamic multicasting and spectral equalization, vital functionalities for optical wavelength switch in the edge of optical access networks. An optical wavelength switch was experimentally implemented and evaluated in a 4x16 switching architecture to demonstrate the concept. This dynamic multicasting and spectral equalization were achieved by utilizing liquid crystal on a silicon spatial light modulator (LCoS-SLM) device. An optimal design of computer-generated holograms (CGHs) through an improved GS algorithm was used to perform the beam steering and wavelength switching. A variety of wavelength switching scenarios has been experimentally evaluated. The measurement results showed an average insertion loss of around -12.5 dB, and the calculated crosstalks were all less than -28 dB. Its applications in digital data transmissions were evaluated to achieve a transmission speed larger than 2.5 Gbps. The eye diagram measurement results showed that most wavelength switching scenarios have nearly bit-error-free transmission. The scenario includes the multicasting with spectral equalization within the proposed asymmetrical switching architecture.

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A full-duplex WDM hybrid fiber-wired/fiber-wireless/fiber-VLC/fiber-IVLC transmission system based on a self-injection locked quantum dash laser and a RSOA

Cited by 58 publications

References 24 publications

A Tunable Energy Signal for Intensity Modulation and Direct Detection Systems: Theory, Simulations, and Experiments

A Tunable Energy Signal for Intensity Modulation and Direct Detection Systems: Theory, Simulations, and Experiments

Performance analysis of symmetrical and bidirectional 40 Gbps TWDM-PON employing m-QAM-OFDM modulation with multi-color LDs based VLC system

Asymmetric Optical Wavelength Switch Based on LCoS-SLM for Edge Node of Optical Access Network

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