ETA Fiber Practice Questions with Complete and Certified Answers

ETA Fiber Practice Questions with Complete and Certified Answers Light is electromagnetic energy with ____ frequency and a ______ shorter wavelength Higher then shorter fiber optics transmission takes place in _____ portion of the light spectrum IR A simple fiber optic System consist of what 4 parts Transmitter, fiber optic cable, receiver, connecters What absolute power is Dbm referenced to 1 milliwatt Absolute power in optical fiber is specified as Dbm Attenuation in optical fiber is lowest at what wavelength 1550 What are the three most common wavelength windows used for communication thru optical fibers 1550, 850, 1300 In North America what year was the first fiber optic telephone system installed 1977 Single-mode fiber optic systems typically use what light source Laser diode Multimode Fiber optic transmitters typically use what two low cost light sources Led, VCSEL The typical numerical aperture for 50/125 I'm optical fiber is .200 One way to reduce modal dispersion is to Use a smaller core The number of modes in an optical fiber increases as the _____ decreases Wavelength What optical effect is produced by all mechanical interconnections whether mechanical splices or mated connected pairs Fresnel Reflections When light passes from one transparent medium to anther transparent medium that has a different refractive index the light wave bends this is called ? Refraction What part of the multimode optical fiber has the lowest refraction index Cladding Single-mode fiber has a _____ core compared to multimode fiber Smaller Single mode systems usually operate at what three wavelengths 1625, 1550, 1310 What are the two most common multimode wavelengths 859, 1300 Attenuation (loss) is specified as DB What is a "mode" in optical fiber A light path Improper bending of optical fiber will do what to tensile strength Decrease OM3 and OM4 multimode fibers are commonly known as _________ fibers Laser optimized What are the two most common multimode optical fiber types 62.5/125 50/125 Different wavelengths of light travel at _____ speeds through glass Different The typical diameter for a fiber used in the tight-buffered cables is? 900 microns In cordage what color signifies single-mode fiber? Yellow In ANSI/TIA-589-C twelve colors comprise the fiber color code. What are the twelve in order ? Blue, Orange, Green, Brown, Slate, White, Red, Black,