Fiber Class Questions and Answers Already Passed

Fiber Class Questions and Answers Already Passed Light is electromagnetic energy with a ____________ frequency and a ___________ wavelength compared to radio waves. Higher/Shorter Fiber optic transmission takes place in the ___________ portion of the light spectrum. Infrared A simple fiber optic system would consist of what 4 parts? Transmitter/Fiber optic Cable/Receiver/Connector What absolute power value is zero dBm referenced to? 1 miliwatt 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 communications through optical fibers? 850/1300/1550 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 Multi-mode fiber optic transmitters typically use what two low cost light sources? LED / VCSEL Different wavelengths of light travel at ___________ speeds through the glass. different Single-mode fibers have a _______________ core compared to multi-mode fibers. smaller The typical numerical aperture (NA) for a 50/125 um optical fiber is? .200 One way to reduce modal dispersion is to? use a smaller core(single mode) 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 connector pairs? Fresnel