PERFORMANCE EVALUATION OF SEVERAL LASER CARRIER MODULATIONS WITH FREE SPACE AND OPTICAL FIBER CHANNELS IN OPTICAL COMMUNICATION SYSTEMS

2020 ◽  
Vol 10 (2) ◽  
pp. 27
Author(s):  
VEDANAYAGI ANITA. R HELEN ◽  
Keyword(s):  
Performance Evaluation ◽  
Optical Fiber ◽  
Optical Communication ◽  
Free Space ◽  
Communication Systems ◽  
Optical Communication Systems ◽  
Fiber Channels

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).

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