5. Consider an InP LED in which the light output is tightly coupled to a step index optical fibre which has a refractive 1.40 for the outer cladding layer. If only 6% of the output power is able to couple into the optical fibre, calculate the refractive index of the fibre core, the numerical aperture and the acceptanc angle. What is the optical loss in decibels? If there is a small air-gap between the fibre core and the LED, calculate the optical power emitted into air as a percentage of the internal optical power for the device. The refractive index of InP is 3.3.
5. Consider an InP LED in which the light output is tightly coupled to a step index optical fibre which has a refractive 1.40 for the outer cladding layer. If only 6% of the output power is able to couple into the optical fibre, calculate the refractive index of the fibre core, the numerical aperture and the acceptanc angle. What is the optical loss in decibels? If there is a small air-gap between the fibre core and the LED, calculate the optical power emitted into air as a percentage of the internal optical power for the device. The refractive index of InP is 3.3.
College Physics
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![5. Consider an InP LED in which the light output is tightly coupled to a step
index optical fibre which has a refractive 1.40 for the outer cladding layer. If
only 6% of the output power is able to couple into the optical fibre, calculate
the refractive index of the fibre core, the numerical aperture and the acceptanc
angle. What is the optical loss in decibels? If there is a small air-gap between
the fibre core and the LED, calculate the optical power emitted into air as a
percentage of the internal optical power for the device. The refractive index of
InP is 3.3.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F537df6af-5e05-4da2-9981-852e82131f2f%2Fcdb59596-09ed-49cb-a4bc-884ccbaf08bb%2Fi5zud7_processed.jpeg&w=3840&q=75)
Transcribed Image Text:5. Consider an InP LED in which the light output is tightly coupled to a step
index optical fibre which has a refractive 1.40 for the outer cladding layer. If
only 6% of the output power is able to couple into the optical fibre, calculate
the refractive index of the fibre core, the numerical aperture and the acceptanc
angle. What is the optical loss in decibels? If there is a small air-gap between
the fibre core and the LED, calculate the optical power emitted into air as a
percentage of the internal optical power for the device. The refractive index of
InP is 3.3.
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