A Prototype of In-Band Full-Duplex Free-Space Optical Transceiver

2018 ◽  
Author(s):  
A F M Saniul Haq ◽  
Mahmudur Rahman Khan ◽  
Murat Yuksel
Keyword(s):  
Free Space ◽  
Full Duplex ◽  
Free Space Optical

scholarly journals Calculations of Signal to Noise Ratio (SNR) for Free Space Optical Communication Systems

2008 ◽  
Vol 5 (1) ◽  
pp. 95-100
Author(s):  
Baghdad Science Journal
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Communication Systems ◽  
Signal To Noise Ratio ◽  
Full Duplex ◽  
Free Space Optical ◽  
Signal To Noise ◽  
Optical Communication Systems ◽  
Space Optical Communication ◽  
Noise Ratio

In this paper, we calculate and measure the SNR theoretically and experimental for digital full duplex optical communication systems for different ranges in free space, the system consists of transmitter and receiver in each side. The semiconductor laser (pointer) was used as a carrier wave in free space with the specification is 5mW power and 650nm wavelength. The type of optical detector was used a PIN with area 1mm2 and responsively 0.4A/W for this wavelength. The results show a high quality optical communication system for different range from (300-1300)m with different bit rat (60-140)kbit/sec is achieved with best values of the signal to noise ratio (SNR).

Dual-Band Accelerating Beams Enabled Full Duplex Free-Space Optical Interconnection

2021 ◽  
Vol 27 (1) ◽  
pp. 1-7
Author(s):  
Xuesong Zhao ◽  
Lei Zhu ◽  
Songnian Fu ◽  
Chen Liu ◽  
Ming Tang ◽  
...  
Keyword(s):  
Free Space ◽  
Full Duplex ◽  
Dual Band ◽  
Optical Interconnection ◽  
Free Space Optical

Bidirectional MDRZ Downstream and NRZ OOK Upstream SS-WDM RoFSO Communication System

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
S. Magidi ◽  
A. Jabeena
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication System ◽  
Free Space ◽  
Cost Effective ◽  
Optical Amplifier ◽  
Rain Attenuation ◽  
Full Duplex ◽  
Urban Systems ◽  
Free Space Optical ◽  
Squeezing Effect

AbstractA cost-effective spectrum sliced wavelength division multiplexing radio over free space (SS-WDM RoFSO) full duplex communication system architecture has been proposed and analyzed. For the downlink, a 10 Gbits/s high spectrally efficient and amplitude maintaining modified duobinary return to zero (MDRZ) modulated the filtered slices from the light source. The free space optical (FSO) channel was modeled by the well-known Gamma-Gamma model and was further subjected to moderate rain attenuation conditions. Four FSO transceivers were used to mitigate against laser beam scintillation, geometrical losses and rain attenuation. For uplink, a reflective semiconductor optical amplifier (RSOA) was used both as a modulator and an amplifier. Its amplitude squeezing effect was used to erase the information in the MDRZ modulated downstream seeding wavelength for uplink transmission of 10 Gbits/s NRZ OOK signals. At a bit error rate (BER) of $1.262\times 10^{-9}$, our proposed architecture revealed that 10 Gbits/s symmetric SS-WDM RoFSO can achieve 4.167 km of free space transmission. Power penalty of approximately 0.2 and 3 dB was achieved for downstream and upstream, respectively, which assures the feasibility of the proposed architecture. Such a system is meant to co-exist with the forthcoming fifth generation long-term evolution urban systems.

Sign in / Sign up

Export Citation Format

Share Document