Optical fiber光纤
Optical fiber光纤
相关考题：
Using fiber optic cable, optical communications have enabled telecommunication （93） to be made over much greater distances and （94）much lower levels of（95）in the transmission medium and possibly most important of all, optical fiber communications have enabled much higher data rates to be accommodatedA. links B. lines C. circuits D. devices A. through B. from C. at D. with A. dispersion B. loss C. noise D. data rate
根据ONU放置的具体位置不同，光纤接入技术可以分为()、光纤到大楼(FTTB：Fiber To The Building)、()、光纤到小区(FTTZ：Fiber To The Zone)、光纤到办公室(FTTO：Fiber To The Office)等几种类型。它们统称为FTTx。
isn't a type of transmission medium used for LANs.A．Twisted pairB．Coaxial cableC．SatelliteD．Optical fiber
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? ()(Choose three.) A. fiber dispersionB. signal attenuationC. transmitter powerD. amplifier bandwidthE. receiver dispersion tolerance
Which device creates an OEO conversion?() A. amplifierB. attenuatorC. regeneratorD. light emitterE. optical switchF. optical receiverG. fiber-optic cable
Given the formula: (Fiber Attenuation * Km) + (Splice Attenuation * of Splices) + (Connector Attenuation * of Connectors) + (Optical Fiber or OADM) + Buffer(Fiber aging)) With regard to SONET/SDH optical calculations, what will the given formula provide?（）A. fiber lossB. OSNR levelC. post amplificationD. index of reflectionE. index of refractionF. power post amplification budget
What three in combination are factors that can cause four－wave mixing in fiber－optic cables? ()(Choose three.) A. low optical powerB. high optical powerC. few optical channelsD. many optical channelsE. low chromatic dispersionF. high chromatic dispersionG. too much power differential in the optical channels
Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?() A. optical technology for transmitting up to 32 channels over multiple fiber strandsB. optical technology for transmitting up to 16 channels over multiple fiber strandsC. a WDM system that is compatible with EDFA technologyD. a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
What are three factors that limit the maximum distance of an amplified optical signal without regeneration? （）(Choose three.)A、fiber dispersionB、signal attenuationC、transmitter powerD、amplifier bandwidthE、receiver dispersion tolerance
What three in combination are factors that can cause four-wave mixing in fiber-optic cables？（）A、 low optical poweB、 high optical powerC、 few optical channelsD、 many optical channelsE、 low chromatic dispersionF、 high chromatic dispersionG、 too much power differential in the optical channels
下面描述正确的是（）A、FTTC://fiber to the curb 光纤到路边B、FTTB：fiber to the building 光纤到大楼C、FTTH：fiber to the home 光纤到户
What are three factors that limit the maximum distance of an amplified optical signal without regeneration？ （）A、 fiber dispersionB、 signal attenuationC、 transmitter powerD、 amplifier bandwidthE、 receiver dispersion tolerance
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)A、low optical powerB、high optical powerC、few optical channelsD、many optical channelsE、low chromatic dispersionF、high chromatic dispersionG、too much power differential in the optical channels
DCM表示是什么器件？（）A、色散位移光纤。（Dispersion-shifted fiber）B、非色散位移光纤。（Non-dispersion-shifted fiber）C、色散补偿模块。（Dispersion compensation module）D、偏振模色散。（Polarization mode dispersion）
What two descriptions best define DWDM？ （）A、 a WDM system that is compatible with EDFA technologyB、 an optical technology for transmitting up to 16 channels over multiple fiber strandsC、 an optical technology for transmitting up to 32 channels over multiple fiber strandsD、 a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDME、 a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM
Which device creates an OEO conversion？ （）A、 amplifierB、 attenuatorC、 regeneratorD、 light emitterE、 optical switchF、 optical receiverG、 fiber-optic cable
Given the formula： （Fiber Attenuation * Km） + （Splice Attenuation * # of Splices） + （Connector Attenuation * # of Connectors） + （Optical Fiber or OADM） + Buffer（Fiber aging）） With regard to SONET/SDH optical calculations， what will the given formula provide？（）A、 fiber lossB、 OSNR levelC、 post amplificationD、 index of reflectionE、 index of refractionF、 power post amplification budget
WDM与（）本质是相同的。A、OFDM(optical frequency division multiplexing)B、OTDM(optical time division multiplexing)C、CDM(code division multiplexing)D、EDFA(erbium doped fiber amplifier)
多选题What three in combination are factors that can cause four-wave mixing in fiber-optic cables？（）Alow optical poweBhigh optical powerCfew optical channelsDmany optical channelsElow chromatic dispersionFhigh chromatic dispersionGtoo much power differential in the optical channels
单选题Which device creates an OEO conversion？ （）A amplifierB attenuatorC regeneratorD light emitterE optical switchF optical receiverG fiber-optic cable
单选题Given the formula: (Fiber Attenuation * Km) + (Splice Attenuation * # of Splices) + (Connector Attenuation * # of Connectors) + (Optical Fiber or OADM) + Buffer(Fiber aging)) With regard to SONET/SDH optical calculations, what will the given formula provide?（）Afiber lossBOSNR levelCpost amplificationDindex of reflectionEindex of refractionFpower post amplification budget
多选题Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?（）Aoptical technology for transmitting up to 32 channels over multiple fiber strandsBoptical technology for transmitting up to 16 channels over multiple fiber strandsCa WDM system that is compatible with EDFA technologyDa technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
单选题Given the formula： （Fiber Attenuation * Km） + （Splice Attenuation * # of Splices） + （Connector Attenuation * # of Connectors） + （Optical Fiber or OADM） + Buffer（Fiber aging）） With regard to SONET/SDH optical calculations， what will the given formula provide？（）A fiber lossB OSNR levelC post amplificationD index of reflectionE index of refractionF power post amplification budget