Principals Of Fiber Optic Transmission Flashcards
The part of the fiber optic link that collects light energy and converts it into an electrical signal?
Receiver
The part of the fiber optic link that converts an electrical signal into light energy?
Transmitter
The part of the fiber optic link that carries light energy form the transmitter to the receiver?
Optical fiber
The part of the fiber optic link that attaches to the optical fiber to the fiber optic cable?
Connector
What is the strength of a signal, represented by a waveform
Amplitude
What are two methods for converting electrical signals into light signals?
Amplitude modulation and pulse code modulation.
What is the signal imposed on the carrier in amplitude modulation?
Intelligence
True or False: A digital signal is not affected by noise and attenuation the way an analog signal is.
True
One binary digit is a?
Bit
How many bits of information are in one byte?
8
What are the two factors that affect the quality of the digital sample?
Sample rate and quantitizing error
What is digitally encoding a analog signal for transmission over a fiber optic link called?
Pulse code modulation
The need for an analog signal to be sampled at twice the rate of the expected frequency is what?
Nyquist minimum
What is multiplexing?
The process of transmitting many channels over one link
What is used to express gain or loss of a fiber optic signal?
Decibel
0 dBm power reference is?
1mW
What are three rules of thumb when calculating loss or gain?
3 dB is 50% loss and 100% gain
7 dB is 80% loss and 500% gain
10 dB is 90% loss and 1000% gain
What is the loss of optical power as the signal passes through the fiber optic link?
Attenuation
Attenuation is measured in?
dB
Power is measured in?
dBm
As frequency increases wavelength?
Decreases
Wavelength is measured in?
Nanometers (nm)
What are the three most common wavelengths used in fiber optics?
850nm, 1300nm, 1550nm
What are the two most common wavelengths used in multimode fiber?
850nm and 1300nm
