(b) A step index fiber has a numerical aperture, NA 0.2588, core refractive index = 1.5 , cladding refractive index = 1.47 and a diameter 125µm. A light source is %3D coupled to this fiber which emits 75% of its light into a 60 degree full-cone angle, 50% into a 30 degree cone and 25% into a 15 degree cone. Calculate the following when this.source and fiber are connected: (i) Acceptance angle (ii} Coupling efficiency (iii) The critical angle at the core cladding interface [9]
(b) A step index fiber has a numerical aperture, NA 0.2588, core refractive index = 1.5 , cladding refractive index = 1.47 and a diameter 125µm. A light source is %3D coupled to this fiber which emits 75% of its light into a 60 degree full-cone angle, 50% into a 30 degree cone and 25% into a 15 degree cone. Calculate the following when this.source and fiber are connected: (i) Acceptance angle (ii} Coupling efficiency (iii) The critical angle at the core cladding interface [9]
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![(b) A step index fiber has a numerical aperture, NA = 0.2588, core refractive index
1.5 , cladding refractive index
1.47 and a diameter 125um. A light source is
coupled to this fiber which emits 75% of its light into a 60 degree full-cone
angle, 50% into a 30 degree cone and 25% into a 15 degree cone, Calculate the
following when this source and fiber are connected:
(i)
Acceptance angle
(ii}
Coupling efficiency
(iii)
The critical angle at the core cladding interface
[9]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F70d86970-59e6-4750-a0d7-1a72be8e9bdd%2F7c7dc0d5-99eb-457e-a24a-8fed62f2512b%2F2poq9bs_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(b) A step index fiber has a numerical aperture, NA = 0.2588, core refractive index
1.5 , cladding refractive index
1.47 and a diameter 125um. A light source is
coupled to this fiber which emits 75% of its light into a 60 degree full-cone
angle, 50% into a 30 degree cone and 25% into a 15 degree cone, Calculate the
following when this source and fiber are connected:
(i)
Acceptance angle
(ii}
Coupling efficiency
(iii)
The critical angle at the core cladding interface
[9]
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