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Optical Fiber Waveguides – 1 – 1

1. Light incident on fibers at angles ……… the acceptance angle do not propagate into the fiber.

(a) Less than
(b) greater than
(c) equal to
(d) 
none of them

ANSWER

EXPLANATION

2. The refractive index of the core region is always ……… that of the cladding region.

(a) greater than
(b) less than
(c) equal to
(d) 
none of the above

ANSWER

EXPLANATION

3. What law does a light traveling in air optical fiber follow ?

(a) millman
(b) snell’s
(c) maxwell
(d)
 huygen

ANSWER

EXPLANATION

4. The core of the optical fiber has ……… ?

(a) A medium index of refraction
(b) A lower index of refraction than the cladding
(c) A lower index of refraction than air
(d) 
A higher index of refraction than the cladding

ANSWER

EXPLANATION

5. The numerical aperture of a fiber if the angle of acceptance is 15 degrees, is :

(a) 017
(b) 0.26
(c) 0.50
(d) 
0.75

ANSWER

EXPLANATION

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