| 1. |
A fiber optic data link sends input data through fiber optic components and provides this data as output information. |
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True |
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False |
| 2. |
A fiber optic data link consists of three parts-transmitter, optical fiber, and receiver. |
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True |
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False |
| 3. |
Multimode and double mode fibers are the two types of fiber optics. |
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True |
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False |
| 4. |
Substances through which some light rays can pass, but through which objects cannot be seen clearly because the rays are diffused, are called ______________ |
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Translucent |
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Transparent |
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Opaque |
| 5. |
Light will always travel faster in the fiber material than in air. |
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True |
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False |
| 6. |
Law of reflection states ______________. |
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Angle of incidence is equal to the angle of reflection |
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Angle of incidence is equal to the angle of refraction |
| 7. |
Attenuation in an optical fiber is caused by absorption, scattering, and bending losses. |
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True |
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False |
| 8. |
In ____________ fibers, the refractive index of the core is uniform and undergoes an abrupt change at the core-cladding boundary. |
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STEP-INDEX |
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GRADED-INDEX |
| 9. |
A _____________________ is a permanent joint between two fibers or two groups of fibers. |
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Fiber optic splice |
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Fiber optic connectors |
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Fiber optic couplers
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| 10. |
Star and tree couplers are dual port couplers that have two input or two output ports. |
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True |
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False |
| 11. |
The MODE POWER DISTRIBUTION (MPD) is the distribution of radiant power among the various modes propagating along the optical fiber. |
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True |
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False |
| 12. |
In mechanical splices, mechanical fixtures hold the two optical fibers in alignment for an indefinite period of time without movement. The amount of splice loss is stable over time and unaffected by changes in environmental or mechanical conditions. |
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True |
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False |
| 13. |
An optical splitter is a passive device that splits the optical power carried by a single input fiber into two output fibers. |
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True |
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False |
| 14. |
A symmetrical coupler transmits the same amount of power through the coupler when the input and output fibers are not reversed. |
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True |
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False |
| 15. |
__________is the spreading of the light pulse as it travels along the fiber caused by dispersion. It reduces the bandwidth, or information-carrying capacity, of an optical fiber. |
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Pulse distortion |
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Pulse absorption |
| 16. |
The principal _______________used in fiber optics are semiconductor light-emitting diodes (LEDs) and laser diodes (LDs). |
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Light sources |
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Optical sources |
| 17. |
___________________continuously vary the output optical power level as a function of the input electrical signal. |
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Analog transmitters |
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Digital transmitters |
| 18. |
SLEDs are abbreviated as_______________ |
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Surface emitting LEDs |
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Super luminescent LEDs |
| 19. |
The ___________is the time it takes electrons to travel out of the detector active area.
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Transit time |
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Response time |
| 20. |
Optical fibers or cables should never be bent at a radius of curvature less than a certain value, called the minimum bend radius |
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True |
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False |
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