The correct answer is: A. Dispersion flattened fiber
Dispersion flattened fiber is a type of optical fiber that has been designed to reduce the effects of chromatic dispersion. Chromatic dispersion is a phenomenon that causes light of different wavelengths to travel at different speeds through an optical fiber. This can cause distortion of the transmitted signal, which can limit the bandwidth and distance that can be achieved.
Dispersion flattened fiber is made by carefully controlling the refractive index profile of the fiber. This profile is designed to reduce the effects of chromatic dispersion over a specific wavelength range. As a result, dispersion flattened fiber can be used to transmit signals over longer distances without experiencing the same level of distortion as other types of optical fiber.
Dispersion flattened fiber is often used in long-haul telecommunications applications. It can also be used in data center applications where high bandwidth and low latency are required.
Here is a brief explanation of each option:
- A. Dispersion flattened fiber is a type of optical fiber that has been designed to reduce the effects of chromatic dispersion.
- B. Zero-dispersion fiber is a type of optical fiber that has zero dispersion at a specific wavelength.
- C. Positive-dispersion fiber is a type of optical fiber that has positive dispersion, meaning that light of shorter wavelengths travels faster than light of longer wavelengths.
- D. Negative-dispersion fiber is a type of optical fiber that has negative dispersion, meaning that light of longer wavelengths travels faster than light of shorter wavelengths.