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Question

Can you calculate number 4 to get the light power. 

← C 4. repeater-less fibre optic commur X 1 0°C Cloudy Page X (411) Lyrical: Chammak Challo | R x + https://blackboard.salford.ac.uk/ultra/courses/_171746_1/outline/edit/document/_8122025_1?courseld=_171746_1&view=content The LED light source A repeater-less fibre optic communications link is to be 10km long. produces 8mW at 0.82µm, has an emitting area of 80μm. and an NA=1. It is closely coupled to short connecting fibre having an NA=0.3. A fibres of 1km length are used having an NA=0.3, core diameter = 50μm and an attenuation of 2dB/km. Connectors having a loss of 2dB from all sources are to be used. Calculate the detected light power. The receiver has an anti-reflecting surface, an input diameter of 100μm and an NA of 0.5 C:\My Documents\University\Modules\Avionic Systems\New Module Material Tutorials\Fibre Optics.docx A a ? Disney + (-47.5dBm) 23:4 12/12/202)
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Transcribed Image Text:← C 4. repeater-less fibre optic commur X 1 0°C Cloudy Page X (411) Lyrical: Chammak Challo | R x + https://blackboard.salford.ac.uk/ultra/courses/_171746_1/outline/edit/document/_8122025_1?courseld=_171746_1&view=content The LED light source A repeater-less fibre optic communications link is to be 10km long. produces 8mW at 0.82µm, has an emitting area of 80μm. and an NA=1. It is closely coupled to short connecting fibre having an NA=0.3. A fibres of 1km length are used having an NA=0.3, core diameter = 50μm and an attenuation of 2dB/km. Connectors having a loss of 2dB from all sources are to be used. Calculate the detected light power. The receiver has an anti-reflecting surface, an input diameter of 100μm and an NA of 0.5 C:\My Documents\University\Modules\Avionic Systems\New Module Material Tutorials\Fibre Optics.docx A a ? Disney + (-47.5dBm) 23:4 12/12/202)
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