單項選擇題

If the dispersion of a given fiber is 17ps/nm*km at 1550 nm and zero at 1310 nm， then what is the accumulated dispersion of an ITU wavelength after it travels 200 km？（）

A. 0 ps/nm
B. 340 ps/nm
C. 200 ps/nm
D. 3400 ps/nm
E. More information is needed.

你可能感興趣的試題

How is a Thin Film filter fabricated？（）

A. The glass core is doped with an Erbium in periodic segments of the fiber.
B. Layers of high index ？and low index ？material are deposited on a glass substrate.
C. Thin layers of silica glass are placed onto wafers to produce a prism-like effect.
D. Fiber is etched with an ultraviolet laser that is precisely spaced for specific wavelength filtering.

多項選擇題

Click the Exhibit button. When designing a DWDM system with multiple amplified spans， a pre-amp is needed at Site B to （）.

A. offset the OADM loss at site B
B. overcome the high multiplexer loss at site A
C. amplify signal levels after the high loss through Fiber Span 1
D. adjust add channels at site B to be at the same level as the passthrough channels
E. ensure that the per channel power is higher than the minimum needed for the post-amp at Site B

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If the dispersion of a given fiber is 17ps/nm*km at 1550 nm and zero at 1310 nm， then what is the accumulated dispersion of an ITU wavelength after it travels 200 km？ （）

你可能感興趣的試題

How is a Thin Film filter fabricated？ （）

Click the Exhibit button. When designing a DWDM system with multiple amplified spans， a pre-amp is needed at Site B to （）.

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If the dispersion of a given fiber is 17ps/nm*km at 1550 nm and zero at 1310 nm， then what is the accumulated dispersion of an ITU wavelength after it travels 200 km？（）

How is a Thin Film filter fabricated？（）

Click the Exhibit button. When designing a DWDM system with multiple amplified spans， a pre-amp is needed at Site B to （）.