Study Questionnaire about Fiber Optics

• What are the three parts of a fiber optic data link?

A. Transmitter, optical fiber, receiver
B. Transmitter, optical fiber, optical connectors
C. Optical fiber, optical connectors, receiver
D. Optical fiber, optical connectors

• Fiber optics uses what medium to send information?

A. Electrons C. Photons
B. Link 11 D. Light

• The fiber optic transmitter has which of the following functions?

A. Amplifies the optical signal
B. Converts the electrical input signal to an optical signal
C. Converts the input optical signal to an electrical signal
D. Amplifies the output electrical signal

• Fiber optic system use what two types of optical sources?

A. LED and APD
B. PIN diodes and LED's
C. LEDs and laser diodes
D. Laser diodes and APDs

• The optical source performs which of the following functions?

A. Amplifies the optical signal
B. Amplifies the electrical signal
C. Launches the optical signal into the fiber
D. Converts the optical signal to an electrical signal

• An optical detector has which of the following purposes?

A. To convert an optical signal into an electrical signal
B. To convert an electrical signal to an optical signal
C. To amplify the optical output signal
D. To generate an optical pulse proportional to the input current

• In fiber optic systems, what are the principal types of detectors used?

A. Integrating spheres
B. Photon counters
C. Photomultiplier tubes
D. PIN photodiodes and APDs

• What are the two basic classifications of fiber optic links?

A. High power and low power
B. Return-to-zero and non-return-to-zero line coded
C. Digital and analog
D. Amplitude modulated and frequency modulated

• In shipboard applications with low data rates (0 to 50 Mbps), which of the follwoing source types will typically be used?

A. 850-nm LEDs only
B. 1300-nm LEDs only
C. Either 850-nm LEDs or 1300 nm LEDs depending on design
D. Lasers

• In an optical source, the input electrical energy is converted to light and which of the following other forms of energy?

A. Gravitational
B. Heat
C. Sound
D. All of the above

• Lasers produce light by what process?

A. Combustion
B. Stimulated emission
C. Spontaneous emission
D. Photosynthesis

• LEDs produce light by what process?

A. Combustion
B. Stimulated emission
C. Spontaneous emission
D. Photosynthesis

• In shipboard applications with low data rates (50 to 200 Mbps), which of the follwoing source types will typically be used?

A. 850-nm LEDs only
B. 1300-nm LEDs only
C. 850-nm LEDs and 1300 nm LEDs
D. Lasers