Fiber Optics Flashcards
6 cards from real Telecommunications practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Fiber Optics flashcards as text
What does DWDM stand for?
Answer: Dense Wavelength Division Multiplexing
DWDM (Dense Wavelength Division Multiplexing) packs many closely spaced wavelengths onto a single fiber, enabling terabit-capacity links.
What is a fiber optic splice closure used for?
Answer: Protect and house fiber splices in outdoor or underground environments
A splice closure is an enclosure that protects fiber splices from environmental exposure in aerial, underground, or direct-buried installations.
Which multimode fiber type offers the highest bandwidth-distance product?
Answer: OM5
OM5 (wideband multimode fiber) is the latest standard, supporting SWDM across four wavelengths for the highest multimode capacity.
What is the typical core diameter of single-mode fiber?
Answer: 8-10 µm
Single-mode fiber has a core diameter of approximately 8-10 µm, which allows only one propagation mode of light.
What causes back-reflection in fiber optic connectors?
Answer: Light reflected back toward the source at connector interfaces
Back-reflection (optical return loss) occurs when a portion of light reflects back toward the transmitter at connector or splice interfaces.
What is the purpose of an optical power meter in fiber testing?
Answer: Measure the optical signal power at a specific point in the link
An optical power meter measures the optical power level (in dBm or mW) at a given point to verify signal strength and calculate link loss.