※ [本文转录自 comm_and_RF 看板] 作者: kidd0308 (小艾) 站内: comm_and_RF 标题: [问题] OC-192的问题 时间: 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 这题我不知道要怎麽算 有人可以帮我吗 拜托大家 --

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