DWDM stands for:
a. Digital Wavelength-Division Modulation b. Dense Wavelength-Division Modulation c. Double Wavelength-Division Modulation d. Dense Wavelength-Division Multiplexing

1 Answer

Answer :

d. Dense Wavelength-Division Multiplexing

Related questions

Description : WDM stands for ____________________-division multiplexing.

Last Answer : Wavelength

Description : FDDI stands for: a. Fiber Digital Data Interface b. Fiber Distributed Data Interface c. Fiber Distribution Delay Interface d. Frequency-Division Data Interface

Last Answer : b. Fiber Distributed Data Interface

Description : Used for time division multiplexing. A. Frequency modulation B. Pulsed modulation C. SSB D. Amplitude modulation

Last Answer : B. Pulsed modulation

Description : A good example of a pilot tone system used in commercial frequency modulation stations. A. FDM B. Time division C. Stereo multiplexing D. Frequency modulation

Last Answer : C. Stereo multiplexing

Description : OTDR stands for: a. Optical Time-Delay Response b. Optical Timing Delay Requirement c. Optical Time-Domain Reflectometer d. Optical Time-Division Relay

Last Answer : c. Optical Time-Domain Reflectometer

Description : How do you transmit through multiplexing, a thousand of voice channel information over a single fiber optic using on e wavelength? A. Polar division B. Time division C. Fiber division D. Frequency division

Last Answer : B. Time division

Description : Modulation is theprocessof A. converting analogsignals todigital signals B. converting digital signals toanalog signals C. Multiplexing various signals intohigh speed line signals D. performing data encryption

Last Answer : converting digital signals toanalog signals

Description : A single channel is shared by multiple signals by _____ a. analog modulation b. digital modulation c. multiplexing d. phase modulation

Last Answer : c. multiplexing

Description : Dense ____________________ allows many different wavelengths of light to share a cable.

Last Answer : WDM

Description : TDM stands for: a) Task Division Multiplexing b) Time Division Multiplexing c) Testing Division Multiplexing d) None of These

Last Answer : b) Time Division Multiplexing

Description : FDM stands for: a) Frequency Division Multiplexing b) Fidelty Division Multiplexing c) Fast Division Multiplexing d) None of These

Last Answer : a) Frequency Division Multiplexing

Description : Which modulation methods are the most widely used in optical systems? ∙ a. Phase and frequency modulations ∙ b. Polarization modulation and phase modulation ∙ c. Intensity modulation and phase modulation ∙ d. Intensity modulation and polarization modulation

Last Answer : Intensity modulation and polarization modulation

Description : Commonly used electro-optic crystal for polarization modulation ∙ a. Lithium Niobate ∙ b. Tourmaline ∙ c. Sodium Chlorate ∙ d. Sphalerite

Last Answer : a. Lithium Niobate

Description : The wavelength of a visible extends from ∙ A. 0.8 to 1.6 um ∙ B. 400 to 750 nm ∙ C. 200 to 660 nm ∙ D. 700 to 1200 nm

Last Answer : B. 400 to 750 nm

Description : A popular light wavelength fiber-optic cable is ∙ A. 0.7 micrometer ∙ B. 1.3 micrometer ∙ C. 1.5 micrometer ∙ D. 1.8 micrometer

Last Answer : B. 1.3 micrometer

Description : The range of wavelength values that a given photodiode will respond. ∙ A. spectral response ∙ B. permeance ∙ C. dark current ∙ D. reluctance

Last Answer : A. spectral response

Description : Light rays that are emitted simultaneously from an LED and propagated down an optical fiber do not arrive at the far end of the fiber at the same time results to ∙ A. intramodal dispersion ∙ B. pulse length dispersion ∙ C. modal dispersion ∙ D. wavelength dispersion

Last Answer : D. wavelength dispersion

Description : How many modes possible with a multimode step-index with a core diameter of 50 um, a core refractive index of 1.6, a cladding refractive index of 1.584, and a wavelength of 1300 nm. ∙ A. 456 ∙ B. 213 ∙ C. 145 ∙ D. 372

Last Answer : D. 372

Description : Infrared light has a wavelength that is ∙ A. less than 400 nm ∙ B. more than 700 nm ∙ C. less than 700 nm ∙ D. a little over 400 nm

Last Answer : B. more than 700 nm

Description : The higher the index number ∙ A. the higher the speed of light ∙ B. the lower the speed of light ∙ C. has no effect on the speed of light ∙ D. the shorter the wavelength propagation

Last Answer : B. the lower the speed of light

Description : Which of the following terms best describes the reason that light is refracted at different angles? ∙ A. Photon energy changes with wavelength ∙ B. Light is refracted as a function of surface smoothness ∙ ... determined partly by a and b ∙ D. The angle is determined by the index of the materials

Last Answer : ∙ D. The angle is determined by the index of the materials

Description : ange of wavelength of visible light ∙ A. 670 nm to 10^3 nm ∙ B. 440 nm to 540 nm ∙ C. 110 nm to 240 nm ∙ D. 390 nm to 770 nm

Last Answer : D. 390 nm to 770 nm

Description : What is the unit of light wavelength? ∙ a. Micrometer ∙ b. Angstroms ∙ c. Mils ∙ d. Fathom

Last Answer : ∙ b. Angstroms

Description : The bandwidth of a fiber is limited by ∙ a. Mode ∙ b. Wavelength ∙ c. Dispersion ∙ d. Frequency

Last Answer : c. Dispersion

Description : Modal dispersion is caused by the ∙ a. Dependence of wavelength on index of refraction ∙ b. Dependence of propagation constant on index of refraction ∙ c. Dependence of the propagation constant on the wavelength ∙ d. Dependence of the propagation constant on the mode number

Last Answer : d. Dependence of the propagation constant on the mode number

Description : Material dispersion is caused by the ∙ a. Wavelength dependence of the index of refraction ∙ b. Wavelength independence of the index of refraction ∙ c. Dependence of the propagation constant on the mode number ∙ d. Independence of the propagation constant on the mode number

Last Answer : d. Independence of the propagation constant on the mode number

Description : What is the typical wavelength of light emitted from epitaxially grown LEDs? ∙ a. 840 nm ∙ b. 490 nm ∙ c. 480 nm ∙ d. 940 nm

Last Answer : ∙ d. 940 nm

Description : What parameter of light detector determines the range or system length that can be achieved for a given wavelength? ∙ a. Transit time ∙ b. Spectral response ∙ c. Dark current ∙ d. Responsitivity

Last Answer : ∙ b. Spectral response

Description : The wavelength of visible light extends from ∙ a. 0.8 to 1.0 nm ∙ b. 400 to 750 nm ∙ c. 200 to 660 nm ∙ d. 700 to 1200 nm

Last Answer : b. 400 to 750 nm

Description : The laser frequency when the light has the wavelength 800 nm is ∙ a. 375 x 1012 Hz ∙ b. 475 x 1015 Hz ∙ c. 375 x 109 Hz ∙ d. 375 x 1018 Hz

Last Answer : d. 375 x 1018 Hz

Description : ______ dispersion is caused by the difference in the propagation times of light rays that take different paths down a fiber. ∙ a. Material dispersion ∙ b. Wavelength dispersion ∙ c. Modal dispersion

Last Answer : ∙ c. Modal dispersion

Description : The wavelength of light has no role in ∙ a. Diffraction ∙ b. Interference ∙ c. Polarization ∙ d. Reflection

Last Answer : c. Polarization

Description : When a beam of light enters one medium from another, which quantity will not change? ∙ a. Direction ∙ b. Speed ∙ c. Frequency ∙ d. Wavelength

Last Answer : c. Frequency

Description : Is the different angle of entry of light into an optical fiber when the diameter of the core is many times the wavelength of the light transmitted. ∙ a. Acceptance angle ∙ b. Modes ∙ c. Sensors ∙ d. Aperture

Last Answer : b. Modes

Description : Which color has the shortest wavelength of light? ∙ a. Red ∙ b. Yellow ∙ c. Blue ∙ d. Green

Last Answer : c. Blue

Description : The receive GCE system in an earth station performs what function(s)? A. Modulation and multiplexing B. Up conversion C. Demodulation and demultiplexing D. Down conversion

Last Answer : C. Demodulation and demultiplexing

Description : _______ is designed to be usedin wirelessapplications in which stations must be ableto sharethe medium without interception by an eavesdropperand without beingsubject tojamming from a malicious intruder. A) Spread spectrum B) Multiplexing C) Modulation D) None of the above

Last Answer : Spread spectrum

Description : The sharing of a medium and its link by two or more devices is called _______. A) modulation B) encoding C) line discipline D) multiplexing

Last Answer : multiplexing

Description : In SONET, SPE stands for synchronous payload ____________________.

Last Answer : envelope

Description : FDDI stands for Fiber ____________________ Data Interface.

Last Answer : Distributed

Description : SONET stands for ____________________ Optical Network.

Last Answer : Synchronous

Description : SDH stands for Synchronous Data ____________________.

Last Answer : Hierarchy

Description : FITL stands for Fiber In The ____________________.

Last Answer : Loop

Description : FTTC stands for Fiber To The ____________________.

Last Answer : Curb

Description : OTDR stands for ∙ a. Optical Time Domain Reflectometer ∙ b. Optical Transmit Direction Return ∙ c. Optical Time Domain Time Regeneration ∙ d. Overtime Direct Reference

Last Answer : c. Optical Time Domain Time Regeneration

Description : SONET stands for ∙ a. System Optical Network ∙ b. Synchronous Optical Network ∙ c. Silica Optic Network ∙ d. System Optical Fiber Net

Last Answer : ∙ b. Synchronous Optical Network

Description : In fiber optics, SCS stands for ∙ a. Suppressed-clad-silicon ∙ b. Silicon base-class-silica ∙ c. Silica-clad-silica ∙ d. Serial-clad-silicon

Last Answer : c. Silica-clad-silica

Description : In fiber optics, PCS stands for ∙ a. Plastic-clad-silica ∙ b. Polyethylene-clad-silica ∙ c. Personal carrier system ∙ d. Personal communication

Last Answer : ∙ a. Plastic-clad-silica