Evaluation and experimental comparisons of different photodetector receivers for visible light communication systems under typical scenarios

Mu, Yu; Wang, Chao; Ren, Jiawei; Zhu, Yi-Jun

doi:10.1117/1.oe.60.9.096101

Cited by 6 publications

(4 citation statements)

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“…The parameters of the SPAD system are referred to Refs. [2,26] and are shown in Table 1. According to the BER performance of SPAD, K S , K b , and T g are the main factors affecting the time-gated SPAD receiver.…”

Section: Simulation and Discussionmentioning

confidence: 99%

“…The introduction of a single photon avalanche diode (SPAD) in the optical wireless communication (OWC) system can effectively expand communication distance [1,2], and reliable transmission can be established in the case of the limited signal power [3]. However, the lower bound of the SPAD receiver bit error rate (BER) is determined by the background light.…”

Section: Introductionmentioning

confidence: 99%

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Gate-Width Optimisation Based on Time-Gated Single Photon Avalanche Diode Receiver for Optical Wireless Communications

Wang

et al. 2022

Electronics

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Using a single photon avalanche diode (SPAD) as a receiver in an optical wireless communications (OWC) system can effectively expand the transmission distance. However, the performance of the SPAD receiver is usually affected with the bit error rate (BER) lower bound determined by background light and the inter-symbol interference (ISI) distortion caused by dead time. In this paper, external time-gated technology is employed, and the SPAD is only activated within the set gate-ON time to alleviate the influence of background light and ISI distortion. The SPAD photon counting model and the communication BER model are established according to the external time-gated characteristics. Considering the functional relationship among the gate-ON time, signal light flux, background light flux and blocking time, we take the minimum BER as the optimization target, the optimal gate-ON time is derived. The numerical results show that whenever the signal light flux or the background light flux is higher, the BER performance of the time-gated mode is apparently better than the free-running mode. For example, when signal photons and background photons are 30 and 10 per symbol time, respectively, the BER of free-running SPAD converges to 0.1, while the BER of the time-gated scheme is about 10−6.

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Section: Simulation and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gate-Width Optimisation Based on Time-Gated Single Photon Avalanche Diode Receiver for Optical Wireless Communications

Wang

et al. 2022

Electronics

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“…One of them is the smartphone camera, which can receive data from the VLC transmitter. LEDs can also be utilized as receivers because they have photosensing properties [28]. Unlike photodiodes, LEDs have advantages in some situations.…”

Section: Receiver Sidementioning

confidence: 99%

Design and implementation of PC to PC data transmission using wireless visible light communication system

Jalil

Sabbar

Fakhruldeen

et al. 2022

IJEECS

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In this paper a laser-based <span>visible light communication system for PC to PC data transmission has been designed, simulated, and implemented. This type of communication uses light waves in the visible spectrum (380 nm to 750 nm) to deliver data. Visible light communication is any way of transmitting data using visible light. In order to avoid being detected by human eyes, this kind of communication sends information at a slower rate than human vision. Visible light communication is significantly more reliable and capable of high information transmission rates than existing wireless technologies such as Wi-Fi, Bluetooth, and others that use radio frequency spectrum. Laser-based visible light communication systems are low-cost, low-power, and do not require radio interference studies. A diode laser is frequently used to create the signal carrier. Due to its high efficiency, it can transmit data as well as illuminate. Light waves can't be intercepted because they can't penetrate opaque objects, signifying a very secure connection.</span>

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“…Avalanche photodiodes (APDs) are highly sensitive photodetectors with a high gain, which are widely used in optical communication, light detection, imaging, and other fields [ 1 , 2 , 3 ]. Compared with optical receivers comprising other optoelectronic devices, APDs offer unique advantages in terms of signal sensitivity and signal transmission distance in optical communication systems because of their internal gain [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Linearity of Light Response in Avalanche Photodiodes by Suppressing Electrode Size Effect

Gan,

Yu,

Wang

2024

Sensors

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The nonlinear characteristics of avalanche photodiodes (APDs) inhibit their performance in high-speed communication systems, thereby limiting their widespread application as optical detectors. Existing theoretical models have not fully elucidated complex phenomena encountered in actual device structures. In this study, actual APD structures exhibiting lower linearity than their ideal counterparts were revealed. Simulation analysis and physical inference based on GaN APDs reveal that electrode size is a noteworthy factor influencing response linearity. This discovery expands the nonlinear theory of APDs, suggesting that APD linearity can be enhanced by suppressing the electrode size effect. A physical model was developed to explain this phenomenon, which is attributed to charge accumulation at the edge of the contact layer. Therefore, we proposed an improved APD design that incorporates an additional gap layer and a buffer layer to stabilize the internal gain under high-current-density conditions, thereby enhancing linearity. Our improved APD design increases the linear threshold for optical input power by 4.46 times. This study not only refines the theoretical model for APD linearity but also opens new pathways for improving the linearity of high-speed optoelectronic detectors.

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Evaluation and experimental comparisons of different photodetector receivers for visible light communication systems under typical scenarios

Cited by 6 publications

References 0 publications

Gate-Width Optimisation Based on Time-Gated Single Photon Avalanche Diode Receiver for Optical Wireless Communications

Gate-Width Optimisation Based on Time-Gated Single Photon Avalanche Diode Receiver for Optical Wireless Communications

Design and implementation of PC to PC data transmission using wireless visible light communication system

Enhancing Linearity of Light Response in Avalanche Photodiodes by Suppressing Electrode Size Effect

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