单项选择题

What is the phenomenon called where different wavelengths of light travel at different speeds?（）

A.OSNR
B.dispersion
C.light skew
D.attenuation

点击查看答案

上一题目录下一题

相关考题

单项选择题

A 2.5 Gb/s (OC-48 or STM-16) optical signal with a dispersion tolerance of 1200 ps/nm goes through fiber with 18ps/nm*km of dispersion. How many 15216-DCU-350 equivalents are needed for enough compensation after traveling 100 km?（）

A.none
B.one
C.two
D.three
E.four

单项选择题

Click the Exhibit button. What is the maximum allowable loss budget between the ONS 15216 Mux (left side) composite output and the ONS 15216 Demux (right side) composite input, with the optical values given in the exhibit? （）(Assume the worst case loss of 4.5 dB for 15216 200 GHz Mux/Demux and ignore power penalties or extra margin.)

A.15dB
B.17dB
C.21dB
D.26dB
E.27dB

多项选择题

What are two important considerations when using 2- or 4-channel 15216 OADMs?（） (Choose two.)

A. All "Add" channels require uniform power levels.
B. The flexibility of wavelengths per OADM is limited.
C. It is easier to balance "Pass-Through" and "Add" channels.
D. There is lower pass-through loss using multi-channel OADMs.
E. You can extract a single channel without dropping other channels.