作者kidd0308 (小艾)
站內comm_and_RF
標題[問題] OC-192的問題
時間Tue Jan 9 10:51:35 2007
an oc-192 system includes
1.A typical silica single-mode fiber.attenuation is 0.2 db/km at
1550nm and dispersion coefficient is 15ps/nm*km
2.laser diode #1.wavelength is 1550nm,linewidth is 0.02nm,and
output power is10mw
3.laser diode #2.wavelength is 1550nm,linewidth is 2nm,and
output power is10mw
4.photodiode.sensitivity is -30dbm
5.erbium-doped fiber amplifier.input power range is -20 to dbm,
saturated output power is 15dbm,signal gain is 20db
please answer the following questions
1.if there are no any optical amplifiers and laser diode #1 is used,
estimate the maximum transmission distance
2..if there are no any optical amplifiers and laser diode #2 is used,
estimate the maximum transmission distance
3.if there is an optical amplifier between transmitted and received
ends and laser diode #1 is used,determine the location of this EDFA
and estimate the maximum transmission distance
這題我不知道要怎麼算
有人可以幫我嗎
拜託大家
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