Question
Download Solution PDFThe source of light for optic fibre transmission is _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFibre light source
A fiber light source is used to inject light into a fiber optic cable for the purpose of testing it.
In fiber optics, Laser and LED are used as a light source to emit electromagnetic radiation.
1.) Light emitting diode (LED)
- LEDs are low cost, slower speed, easy to use, multimode-only, and have a wide output pattern.
- Because LEDs produce less concentrated light than lasers and have a much lower power output than lasers, they’re difficult to couple into fibers, limiting them to multimode fibers.
- LEDs have less bandwidth than lasers and can achieve a maximum throughput of 1 Gbps.
2.) Laser diode
- Laser diodes are higher cost and faster speed, allow single-mode or multimode and have a narrow output pattern.
- Lasers can achieve throughput up to and beyond 10 Gbps.
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