High-Speed GaN-Based Superluminescent Diode for 4.57 Gbps Visible Light Communication

Li, Dong; Ma, Chicheng; Wang, Junfei; Hu, Fangchen; Hou, Yuqi; Wang, Shanshan; Hu, Junhui; Yi, Shulan; Ma, Yingnan; Shi, Jianyang; Zhang, Junwen; Chi, Nan; Shen, Chao

doi:10.3390/cryst12020191

Cited by 14 publications

(5 citation statements)

References 15 publications

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“…A net data rate of 6.48 Gb/s at a bit error ratio (BER) of 3.6 × 10 −3 was achieved, which meets the 7 %-overhead forward error correction (FEC) BER limit of 3.8 × 10 −3 . It should be noted that this link demonstrated a 50% improvement over the previous record using SLDs 12 (4.6 Gb/s) even with this 3-m-long transmission distance.…”

Section: Resultsmentioning

confidence: 59%

Chaotic-cavity surface-emitting laser array for optical wireless communication and low-speckle illumination

Ooi,

Lu,

Alkhazragi

et al. 2024

Smart Photonic and Optoelectronic Integrated Circuits 2024

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While highly coherent light has its advantages in certain applications, it also leads to some unwanted effects, such as the formation of speckles, negatively impacting imaging, lighting, and projection/display quality. This has prompted the development of edge-emitting semiconductor light sources with partial coherence, such as broadband lasers and superluminescent diodes (SLDs), which have found use in display applications, optical coherence tomography, and random bit generation. However, the edge-emission design of these sources complicates the fabrication of two-dimensional arrays, preventing their use in many applications. On the other hand, vertical-cavity surface-emitting lasers (VCSELs) have gained popularity in consumer electronics due to the unique benefits of surface emission. Yet, they face challenges related to high coherence. We demonstrate that by leveraging the distinctive properties of chaotic cavities, we can reduce the coherence of VCSELs without enlarging their emission area. This enables high-speed wireless communication with low-speckle illumination, as confirmed through comprehensive interference studies and high-speed testing. We show that the chaotic-cavity VCSELs can provide better illumination quality while maintaining high data rates (12.6 Gb/s over short distances and 6.5 Gb/s over 3 m). In addition, the use of a carefully designed AC signal for communication can further lower the speckle contrast, which improves the illumination performance. This paves the way for the potential use of chaoticcavity VCSELs as versatile light sources for illumination, imaging, projection, communication, and various other applications.

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Section: Resultsmentioning

confidence: 59%

Chaotic-cavity surface-emitting laser array for optical wireless communication and low-speckle illumination

Ooi,

Lu,

Alkhazragi

et al. 2024

Smart Photonic and Optoelectronic Integrated Circuits 2024

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“…Notable research efforts have explored the use of low-coherence light sources for data transmission across various scenarios 61,191,192 . In 2016, Shen et al, investigated for the first time the implementation of low coherent light using semipolar GaN SLDs in communication systems 61 .…”

Section: Optical Communication and Illuminationmentioning

confidence: 99%

“…Shen et al demonstrated the generation of white light using an SLD with a high color rendering index (CRI) of 88.2 at a correlated color temperature (CCT) of 3522 K, and it was used in a VLC system with a high data rate of 1.2 Gb s -1 using the OOK modulation technique and up to 3.4 Gb s -1 using the discrete multitone (DMT) modulation technique 53 . More recently, the highest communication data rate using an SLD was demonstrated (up to 4.6 Gb s -1 using DMT) 192 . The application of SLDs in communication systems has yielded promising results and has the potential to revolutionize high-speed data transmission, offering a balance between power, safety, and efficiency.…”

Section: Optical Communication and Illuminationmentioning

confidence: 99%

Low-coherence semiconductor light sources: devices and applications

Lu,

Alkhazragi,

Wang

et al. 2024

npj Nanophoton.

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Since the invention of the laser, there have been countless applications that were made possible or improved through exploiting its multitude of unique advantages. Most of these advantages are mainly due to the high degree of coherence of the laser light, which makes it directional and spectrally pure. Nevertheless, many fields require a moderate degree of temporal or spatial coherence, making conventional lasers unsuitable for these applications. This has brought about a great interest in partially coherent light sources, especially those based on semiconductor devices, given their efficiency, compactness, and high-speed operation. Here, we review the development of low-coherence semiconductor light sources, including superluminescent diodes, highly multimode lasers, and random lasers, and the wide range of applications in which they have been deployed. We highlight how each of these applications benefsits from a lower degree of coherence in space and/or time. We then discuss future potential applications that can be enabled using new types of low-coherence light.

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“…[ 16 ] A blue SLD with a wavelength of 443 nm, using DMT modulation, can reach a data rate of 4.57 Gbps, currently the highest data rate achieved by SLD. [ 19 ] However, it is worth noting that excessive exposure to blue light may have negative effects on health, as it inhibits the production of melatonin in the human body. Consequently, research on SLDs in the violet spectrum range is relatively lacking.…”

Section: Introductionmentioning

confidence: 99%

High‐Speed GaN‐Based 405 nm Violet Superluminescent Diode with Tilted Facet for Visible Light Communications

Dong,

Yi,

Wang

et al. 2024

Physica Status Solidi (a)

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Visible light communication (VLC) based on superluminescent diode (SLD) is a promising technology with great potential for future 6G optical wireless network. In this work, a 405 nm violet SLD device is fabricated with an 8° tilted facet at one end of the waveguide based on InGaN/GaN quantum wells. The device has an optical power of 14.67 mW under continuous‐wave operation. The full width at half maximum (FWHM) of the SLD at 400 mA is 12.52 nm, which is significantly larger than that in a violet laser diode (LD). Using the SLD as transmitter in VLC system, a high data transmission rate of 3.299 Gbps has been achieved using the discrete multiple tone (DMT) modulation. The corresponding bit error ratio (BER) is measured to be 1.67 × 10−3, which satisfies the forward error correction (FEC) threshold of 3.8 × 10−3. The results suggest that such device can be used as a promising light source for VLC and light fidelity (LiFi) applications.

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High-Speed GaN-Based Superluminescent Diode for 4.57 Gbps Visible Light Communication

Cited by 14 publications

References 15 publications

Chaotic-cavity surface-emitting laser array for optical wireless communication and low-speckle illumination

Chaotic-cavity surface-emitting laser array for optical wireless communication and low-speckle illumination

Low-coherence semiconductor light sources: devices and applications

High‐Speed GaN‐Based 405 nm Violet Superluminescent Diode with Tilted Facet for Visible Light Communications

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