4. A repeater-less fibre optic communications link is to be 10km long. The LED light source 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. The receiver has an anti-reflecting surface, an input diameter of 100μm and an NA of 0.5 Calculate the detected light power. (-47.5dBm)
4. A repeater-less fibre optic communications link is to be 10km long. The LED light source 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. The receiver has an anti-reflecting surface, an input diameter of 100μm and an NA of 0.5 Calculate the detected light power. (-47.5dBm)
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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)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa08bfa77-c1f0-44a2-b603-7ee3d9131f19%2Fada160b2-c58b-4e81-b270-c325e63d330e%2Fd08726_processed.jpeg&w=3840&q=75)
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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