Self restorable intra data center interconnect based on multimode fiber and free-space optics

Mirza, Jawad; Raza, Aadil; Atieh, Ahmad; Iqbal, Saeed; Ghafoor, Salman

doi:10.1117/1.oe.60.3.036113

Cited by 6 publications

(3 citation statements)

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“…Previously, the FSO applications were restricted to military and inter-satellite communication paradigm and therefore was held in secrecy [43]. To address the ever-increasing demand for higher data rates and bandwidth requirements, FSO communications products were inducted for commercial usage [44,45]. In the future, efficient and optimum wireless technology would be evolving for heterogeneous building communication networks.…”

Section: Strength and Advancements In Fso Communication Systemmentioning

confidence: 99%

Duplex Baseband Signal Transmission Over Free Space Optical (FSO) Link Employing Carrier Reuse

Zaheer

2023

Preprint

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With increasing IoT and a plethora of multimedia applications being used, there is an ever-increasing demand for bandwidth-intensive applications coupled with cost-effectiveness. Communication networks employing optical fiber had been de facto standard for such communication systems. The Optical Fiber network's high cost and man-hours required for laying demand wireless solutions. Therefore, an optimum and cost-effective duplex optical link for two channels baseband signal data transmission has been designed and validated using a single laser source. The link is designed for high data rate transmission between buildings within 1.5~2 km utilizing modular and low complexity. An optical link for 20 Gb/s duplex data transmission is designed using a single laser source. A transmission distance of 1.5 km has been achieved by providing a cost-efficient design with low complexity by utilizing differential quadrature phase shift keying (DQPSK) and On-Off Keying (OOK) modulation techniques. The design allowed us to reuse the downlink signal for the uplink transmission over free Space, thus eliminating the requirement for a separate laser at the other end. Each channel's transmission data rate was 10Gb/sec. At the former end, the DQPSK technique was employed for data modulation and the data was transmitted into free space. The data was then split at the latter end for downlink reception along with reusing the downlink received signal for uplink transmission to the former end utilizing the OOK modulation technique. The received data was compared with the transmitted one to verify and validate the system's accuracy through signal waveforms and BER (Bit Error Rate). Bit error rate (BER) curves and eye diagrams of the received uplink and downlink signal over a duplex transmission single fiber link are provided.

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Section: Strength and Advancements In Fso Communication Systemmentioning

confidence: 99%

Duplex Baseband Signal Transmission Over Free Space Optical (FSO) Link Employing Carrier Reuse

Zaheer

2023

Preprint

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“…In [18], the study proposes a switch-free network, where optical beams from each server within a rack are combined as a FSO-Bus and then directed by a selector. In [19], the study proposes a structure where ToR switches are primarily connected with OM4 fibers and FSO links serve as protections against path failures. In [20], the study introduces an interserver transceiver, where racks are arranged in a circular layout with ToRs interconnected with a central aggregate switch.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Beam Steering Free-Space and Fiber Based Optical Data Center Network

Liu

Benjamin

Parsonson

et al. 2023

J. Lightwave Technol.

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Wireless data center networks (DCNs) are promising solutions to mitigate the cabling complexity in traditional wired DCNs and potentially reduce the end-to-end latency with faster propagation speed in free space. Yet, physical architectures in wireless DCNs must be carefully designed regarding wireless link blockage, obstacle bypassing, path loss, interference and spatial efficiency in a dense deployment. This paper presents the physical layer design of a hybrid FSO/in-fiber DCN while guaranteeing an all-optical, single hop, non-oversubscribed and full-bisection bandwidth network. We propose two layouts and analyze their scalability: (1) A static network utilizing only tunable sources which can scale up to 43 racks, 15, 609 nodes and 15, 609 channels; and (2) a re-configurable network with both tunable sources and piezoelectric actuator (PZT) based beam-steering which can scale up to 8 racks, 2, 904 nodes and 185, 856 channels at millisecond PZT switching time. Based on a traffic generation framework and a dynamic wavelength-timeslot scheduling algorithm, the system-level network performance is simulated for a 363-node subnet, reaching > 99% throughput and 1.23 µs average scheduler latency at 90% load.

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“…In [13,14], the authors proposed optical relays and regenerative relays to mitigate atmospheric attenuation and turbulence-induced fading. Despite, these mitigation techniques, a hybrid FSO/RF parallel link is an excellent choice [15,16]. 5G networks having ultra-dense cells are only tens of meters apart, therefore, FSO links are the best alternative to fiber in such scenarios [17,18].…”

Section: Introductionmentioning

confidence: 99%

Duplex Baseband Signal Transmission Over Free Space Optical Link Employing Carrier Reuse

Shamsi

2022

Preprint

View full text Add to dashboard Cite

With increasing IoT and a plethora of multimedia applications being used, there is an ever-increasing demand for bandwidth-intensive applications. Communication networks employing optical fiber had been the de facto standard for such communication systems. The Optical Fiber network's high cost and man-hours required for laying demand wireless solutions. Therefore, an optimum and cost-effective duplex optical link for two channels baseband signal data transmission has been designed and validated using a single laser source. An optical link for 20 Gbps duplex data transmission is designed based upon single laser source utilization. A cost-efficient and simple design have been accomplished with a transmission distance of 1.5 km by utilizing Differential Quadrature Phase Shift Keying (DQPSK) and On-Off Keying (OOK) modulation techniques. The design allowed us to recycle the downlink signal in uplink transmission over free Space, thus eradicating the requirement for a separate laser at the other end. Each channel's transmission data rate was 10 Gb/sec. At the former end, the DQPSK technique was employed for data modulation and the data was transmitted into free space. The data was then split at the latter end for downlink reception along with reusing the downlink received signal for uplink transmission to the former end utilizing the OOK modulation technique. The received data was compared with the transmitted one to verify and validate the system's accuracy through signal waveforms and BER (Bit Error Rate). The eye diagrams and the Bit error rate (BER) graphs of the received downlink and uplink signals over a duplex Free Space Optical (FSO) transmission link are discussed and presented.

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Self restorable intra data center interconnect based on multimode fiber and free-space optics

Cited by 6 publications

References 0 publications

Duplex Baseband Signal Transmission Over Free Space Optical (FSO) Link Employing Carrier Reuse

Duplex Baseband Signal Transmission Over Free Space Optical (FSO) Link Employing Carrier Reuse

A Hybrid Beam Steering Free-Space and Fiber Based Optical Data Center Network

Duplex Baseband Signal Transmission Over Free Space Optical Link Employing Carrier Reuse

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