A 50 m/40 Gbps 680-nm VCSEL-based FSO communication

Tsai, Wen-Shing; Lu, Hai‐Han; Li, Chung-Yi; Lu, Ting-Chieh; Liao, Chen-Hong; Chu, Chien-An; Peng, Peng‐Chun

doi:10.1109/ipcon.2016.7830970

Cited by 3 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two-stage EIL has been deployed by Lin et al [13] on 680 nm red vertical cavity surface emitting laser (VCSEL), thus successfully reporting 56 Gb/s data transmission using pulse amplitude modulation (PAM4) scheme in a 20 m indoor free space channel. Subsequently, an improvement in the modulation bandwidth from 5.2 GHz to 26 GHz and then to 41.8 GHz using two and three-stage external injection-locked VCSELs were demonstrated, and with 25 and 40 Gb/s error-free data transmission, respectively, along a 50-m indoor free space channel [14]. In addition, an increase in the optical power was observed in EIL case compared to the free-running case, a signature of injection locking.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Self-Injection Locked Visible Laser Diodes for High Bit-Rate Visible Light Communication

et al. 2018

View full text Add to dashboard Cite

We report on self-injection locking in InGaN/GaN (blue/green) and InGaP/AlGaInP (red) visible-light laser diodes. The free-space optical feedback path was accomplished via an external mirror. The effect of injection current, optical power injection ratio, and external cavity length on the spectral linewidth and modulation bandwidth of the lasers is investigated. Our results show that the laser performance was substantially improved. In particular, we achieved a significant increase of ∼57% (1.53-2.41 GHz) and ∼31% (1.72-2.26 GHz) in the modulation bandwidth, and ∼9 (1.0-0.11 nm) and ∼9 (0.63-0.07 nm) times reduction in spectral linewidth of the green and blue lasers, respectively. Consequently, side-mode-suppression-ratio was considerably increased in all the cases, reaching as high as ∼20 dB in self-injection locked blue laser diode, thus enabling a close to single-mode operation. This paper paves the way for attaining high-speed optical wireless communications by overcoming the challenges of limited modulation bandwidth and multimode operation of visible laser diodes with this simple scheme.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation of Self-Injection Locked Visible Laser Diodes for High Bit-Rate Visible Light Communication

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The free-space transmission distance is greatly increased by the afocal scheme, and the free-space transmission rate is significantly enhanced by the DWDM technology. Afocal scheme, which can reduce the beam size of laser beam, is expected to provide a long freespace transmission distance in an FSO communication [6]. DWDM technology, which can fully utilize the free-space bandwidth, is expected to enhance the transmission rate of an FSO communication [7].…”

Section: Introductionmentioning

confidence: 99%

A 50-m/320-Gb/s DWDM FSO Communication With Afocal Scheme

Tsai

et al. 2016

IEEE Photonics J.

Self Cite

View full text Add to dashboard Cite

This paper proposes and presents the experimental demonstration of 320-Gb/s free-space optical (FSO) communication based on dense-wavelength-division-multiplexing (DWDM) technology and afocal scheme. To the best of our knowledge, this is the first one that adopts DWDM technology and afocal scheme to successfully demonstrate 50-m/320-Gb/s FSO communication. Results show that the free-space transmission distance is greatly increased by the afocal scheme and that the free-space transmission rate is significantly enhanced by the DWDM technology. DWDM FSO communication over a 50-m free-space link with a total transmission rate of 320 Gb/s ð40 Gb/s= Â 8 ¼ 320 Gb/sÞ is achieved. With the aid of a low-noise amplifier and clock/data recovery at the receiving site, good bit-error-rate (BER) performance and clear eye diagram are obtained at a 50-m/320-Gb/s operation. Such 50-m/320-Gb/s DWDM FSO communication provides the advantages of optical wireless communications for long transmission distance and high transmission rate, which is thoroughly useful for long-haul and high-speed light-based WiFi (LiFi) applications.

show abstract