Polarization-multiplexed 2×2 phosphor-LED wireless light communication without using analog equalization and optical blue filter

Yeh, Chien‐Hung; Chen, H. Y.; Liu, Y. L.; Chow, Chi‐Wai

doi:10.1016/j.optcom.2014.08.003

Cited by 14 publications

(7 citation statements)

References 12 publications

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“…The B-and G-LEDs can support higher VLC modulation capacity with lower illuminations from 6.9 to 225.1 lux under longer indoor wireless transmission length on the proposed VLC system. Compared to the previous studies [12], [13], their presented polarization-multiplexing VLC systems could accomplish the total data rates of 380 Mbit/s OFDM and 1 Gbit/s 16-QAM Nyquist modulations, respectively. However, the free space transmission lengths of their proposed VLCs only reached <1 m together with larger illumination.…”

Section: Experiments and Resultsmentioning

confidence: 86%

“…The insufficient bandwidth of LED would result in the lower modulation data rate of VLC traffic. To accomplish a higher transmission capacity of using commercial LED, employing pre-post-equalization techniques [3], [5]- [6], advanced modulation format [7], [8], optical parallel transmission method [9], wavelength-multiplexing RGB-LED [10], optical multi-input multi-output (MIMO) design [11], and polarization-multiplexing technique [12], [13] have been proposed and demonstrated. Moreover, to extend the modulation bandwidth to a few hundred MHz for VLC traffic, GaN-based characteristics LEDs have also been studied [14], [15].…”

Section: Introductionmentioning

confidence: 99%

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1.7 to 2.3 Gbps OOK LED VLC Transmission Based on 4 × 4 Color-Polarization-Multiplexing at Extremely Low Illumination

et al. 2019

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To achieve the high traffic rate of a GaN LED-based visible light communication (VLC), a 4 × 4 color-polarization-multiplexing system is demonstrated by using two blue and two green LEDs. In the measurement, an available bandwidth of blue and green LEDs can be greater than 465 MHz for VLC modulation traffic by using the suitable analogy front end circuit. Hence, the proposed VLC system can deliver 1.7 to 2.3 Gbit/s ON-OFF keying traffic rates in the free space transmission length of 1-4 m under the extremely low illumination of 6.9-136.1 lux for the indoor application. Moreover, the measured BER of each LED is less than the forward error correction target of 3.8 × 10 −3 to maintain the better signal performance.

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Section: Experiments and Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

1.7 to 2.3 Gbps OOK LED VLC Transmission Based on 4 × 4 Color-Polarization-Multiplexing at Extremely Low Illumination

et al. 2019

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“…We also observe that the insertion loss of the LP is negligible for P1 and P2, leading to a BER as good as without LP. Consequently, polarization multiplexing technique with standalone configuration could serve to further boost the data rate [36,37].…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the VLC capacity can be enhanced by introducing inexpensive optical components within the communication link. For example, linear polarizers enabling new degrees of freedom [36,37], and/or blue filter suppressing slow phosphorescent components [19,20] can serve to augment the limited bandwidth. However, their utility is controversial since they also introduce high signal attenuation [38,39].…”

Section: Introductionmentioning

confidence: 99%

4-Gbit/s visible light communication link based on 16-QAM OFDM transmission over remote phosphor-film converted white light by using blue laser diode

et al. 2015

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Visible Light Communication (VLC) as a new technology for ultrahigh-speed communication is still limited when using slow modulation light-emitting diode (LED). Alternatively, we present a 4-Gbit/s VLC system using coherent blue-laser diode (LD) via 16-quadrature amplitude modulation orthogonal frequency division multiplexing. By changing the composition and the optical-configuration of a remote phosphor-film the generated white light is tuned from cool day to neutral, and the bit error rate is optimized from 1.9 × 10(-2) to 2.8 × 10(-5) in a blue filter-free link due to enhanced blue light transmission in forward direction. Briefly, blue-LD is an alternative to LED for generating white light and boosting the data rate of VLC.

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“…White light-emitting diode (LED) based VLC would restrict the modulation bandwidth to a few MHz due to the long relaxation time of phosphor layer 16 , 17 . Hence, using high spectral-efficiency modulation schemes 18 , 19 , multi-input-multi-output (MIMO) technique 20 , 21 , special LED devices 22 and R/G/B LED 23 could enhance significantly the VLC data rate to a few Gbit/s. In order to achieve a higher VLC traffic data rate, the visible LD could be utilized to provide high modulation speed and high electrical-to-optical (EO) conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Using a Single VCSEL Source Employing OFDM Downstream Signal and Remodulated OOK Upstream Signal for Bi-directional Visible Light Communications

Yeh

Wei

Chow

2017

Sci Rep

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In this work, we propose and demonstrate for the first time up to our knowledge, using a 682 nm visible vertical-cavity surface-emitting laser (VCSEL) applied in a bi-directional wavelength remodulated VLC system with a free space transmission distance of 3 m. To achieve a high VLC downstream traffic, spectral efficient orthogonal-frequency-division-multiplexing quadrature-amplitude-modulation (OFDM-QAM) with bit and power loading algorithms are applied on the VCSEL in the central office (CO). The OFDM downstream wavelength is remodulated by an acousto-optic modulator (AOM) with OOK modulation to produce the upstream traffic in the client side. Hence, only a single VCSEL laser is needed for the proposed bi-directional VLC system, achieving 10.6 Gbit/s OFDM downstream and 2 Mbit/s remodulated OOK upstream simultaneously. For the proposed system, as a single laser source with wavelength remodulation is used, the laser wavelength and temperature managements at the client side are not needed; and the whole system could be cost effective and energy efficient.

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Polarization-multiplexed 2×2 phosphor-LED wireless light communication without using analog equalization and optical blue filter

Cited by 14 publications

References 12 publications

1.7 to 2.3 Gbps OOK LED VLC Transmission Based on 4 × 4 Color-Polarization-Multiplexing at Extremely Low Illumination

1.7 to 2.3 Gbps OOK LED VLC Transmission Based on 4 × 4 Color-Polarization-Multiplexing at Extremely Low Illumination

4-Gbit/s visible light communication link based on 16-QAM OFDM transmission over remote phosphor-film converted white light by using blue laser diode

Using a Single VCSEL Source Employing OFDM Downstream Signal and Remodulated OOK Upstream Signal for Bi-directional Visible Light Communications

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