Optical Fiber

Multiple Choice Questions on the topic Optical Fiber in Electronics Engineering.

MCQ On Optical Fiber Part 6: Questions & Answers

MCQ On Optical Fiber Part 6. Electronics Engineering 15+ Multiple Choice Questions related to Optical Fibers.

 

MCQ On Optical Fiber Part 6

 

If a noisy channel has a bandwidth of 4 MHz with signal to noise ratio of about 1, what would be the maximum capacity of the channel ??

a. 2 Mb/sec
b. 4 Mb/sec
c. 6 Mb/sec
d. 8 Mb/sec

 

In the structure of fiber optic cable, the refractive index of the core is always _______the refractive index of cladding ??

a. Less than
b. Equal to
c. Greater than
d. None of the above

 

The order of mode is equal to the number of field ____ across the guide ??

a. Zeros
b. Poles
c. Ones
d. All of the above

 

Which among the following represents the lateral shift of a light beam on reflection at a dielectric interface ??

a. Doppler’s Shift
b. Goos-Haenchen’s Shift
c. Frequency Shift
d. Phase Shift

 

MCQs Electronics Engineering

 

Why are plastic-clad silica fiber optic cables not used widely ??

a. Difficulty in connector application due to excessive plasticity in cladding
b. Difficulty in bonding
c. Insolubility in organic solvents
d. All of the above

 

In cables, water is prevented from filling the spaces with __________ resistant compounds ??

a. moisture
b. pressure
c. temperature
d. stress

 

Which reason/s is/are responsible for the occurrence of non-linear Cross Phase Modulation (XPM) ??

a. Difference in transmission phase of peak pulse & leading or trailing edges of pulse
b. Third-order optical non-linearity
c. Intensity dependence of refractive index
d. All of the above

 

What is/ are the consequence/s of Self Phase Modulation in non-linear optics ??

a. Modification in pulse spectrum
b. Limited transmission rate
c. Dispersion effect
d. All of the above

 

MCQ On Optical Fiber Part 6

 

Which type of fiber-optic coupler causes the distribution of optical power from more than two input ports among the several output ports ??

a. Star Coupler
b. Tree Coupler
c. X Coupler
d. All of the above

 

Which optical devices are adopted or applicable for routing signals from one waveguide to another ??

a. Optical Combiner
b. Optical Splitter
c. Optical Coupler
d. None of the above

 

Which among the following characteristics of Laser light specifies the precise movement of all individual light waves together through time and space ??

a. Monochromatic
b. Directional
c. Coherent
d. Brightness

 

Which modes are acknowledged due to their association with electromagnetic field and beam profile in the direction perpendicular to the plane of pn junction ??

a. Longitudinal Modes
b. Transverse Modes
c. Lateral Modes
d. All of the above

 

MCQ On Optical Fiber Part 6

 

Which type of injection laser involves the use of geometry for the fabrication of the multimode injection laser with a single or small number of lateral modes ??

a. Gain guided laser
b. Index guided laser
c. Quantum well laser
d. Quantum dot laser

 

In the dynamic response of Injection Laser Diode (ILD), the delay which is followed by ____ frequency damped oscillations gives rise to the generation of relaxation oscillations ??

a. Low
b. Medium
c. High
d. All of the above

 

The spectral response of an ideal photodetector depicts its efficiency as a function of _________ ??

a. amplitude
b. frequency
c. period
d. wavelength

 

MCQ On Optical Fiber Part 5: Questions & Answers

MCQ On Optical Fiber Part 5. This section includes 15 Multiple Choice Questions on Optical Fibers.

 

MCQ On Optical Fiber Part 5

 

According to the frequency response of the photo-detector, the modulation frequency at which the output current decreases to ________ of the peak value ??

a. one-third
b. one-fourth
c. half
d. one-tenth

 

Which photodiodes are crucially applicable to overcome the bandwidth-quantum efficiency trade-off along with its resemblance to the pyramid structure ??

a. Mushroom Waveguide Photodiode
b. Traveling Wave Photodiode
c. Resonant Cavity Photodiode
d. All of the above

 

When an optical signal is an incident on a photo-detector, which noise originate/s due to the statistical nature of production and collection of photoelectrons ??

a. Dark Current Noise
b. Quantum Noise
c. Surface Leakage Current noise
d. All of the above

 

In an eye diagram, digital signals with very bad interference resemble the shape of _____ ??

a. circle
b. rectangle
c. triangle
d. straight line

 

MCQs

 

On which factor/s do/does the response time of photodiode depend/s ??

a. Diffusion time of photo carriers outside the depletion region
b. The diffusion time of photo carriers within the depletion region
c. RC time constant
d. All of the above

 

Which nature of charge carriers give rise to the current fluctuations thereby resulting in the generation of shot noise ??

a. Continuous
b. Discrete
c. Sampled
d. All of the above

 

Which among the following parameters is/are decided by the front-end of a receiver ??

a. Sensitivity
b. Bandwidth
c. Both a and b
d. None of the above

 

In an optical network, increase in the number of lasers ________ the bit rate ??

a. Increases
b. Stabilizes
c. Decreases
d. None of the above

 

MCQ On Optical Fiber Part 5

Which band/s specify/ies the operation range of Erbium-doped fiber amplifier (EDFA) ??

a. By O band
b. By C band
c. By S band
d. All of the above

 

Basically, solitons are pulses which propagate through the fiber without showing any variation in ______ ??

a. Amplitude
b. Velocity
c. Shape
d. All of the above

 

Why is electrical isolation required between several portions of an electronic circuit ??

a. Provision of high voltage protection
b. Reduction in noise level
c. Both a & b
d. None of the above

 

For measuring the shape of input pulse in the time-domain intermodal dispersion method, the test fiber is replaced by another fiber whose length is less than ___ of the test fiber ??

a. 1%
b. 5%
c. 10%
d. 20%

 

MCQ On Optical Fiber Part 5

In chromatic dispersion, which parameter for the modulation of the received signal is measured with the help of a vector voltmeter ??

a. Amplitude
b. Frequency
c. Phase
d. Period

 

Which among the following stages is/are adopted in Splice Loss Experiment ??

a. Translational
b. Rotational
c. Both a and b
d. None of the above

 

Which among the following misalignments give/gives rise to the occurrence of splice loss ??

a. Longitudinal separation between the end-faces of fiber
b. Angular tilt between fiber ends
c. Transverse offset between fiber ends
d. All of the above

 

MCQ On Optical Fiber Part 4: Optical Fiber Q & A

MCQ On Optical Fiber Part 4. This part has 10 Multiple Choice Questions on Optical Fibers.

 

MCQ On Optical Fiber Part 4 

 

Which line code in PCM indicates the return of signal to zero between each pulse & takes place even due to the occurrence of consecutive 0’s & 1’s in the signal ??

a. Return-to-zero (RZ)
b. Non-Return to zero space
c. Return to zero inverted
d. Non-return to zero inverted

 

In the structure of the fiber, the light is guided through the core due to total internal ______ ??

a. reflection
b. refraction
c. diffraction
d. dispersion

 

In the structure of a fiber, which component provides additional strength and prevents the fiber from any damage ??

a. Core
b. Cladding
c. Buffer Coating
d. None of the above

 

Which is the transmission medium for VLF electromagnetic waves especially applicable for aeronautical and submarine cables ??

a. Paired wires
b. Coaxial cable
c. Waveguide
d. Wireless

 

Which rays exhibit the variation in the light acceptability ability of the fiber ??

a. Meridional
b. Skew
c. Leaky
d. All of the above

 

MCQ On Optical Fiber Part 4 

 

If a fiber operates at 1400nm with the diameter of about 10 μm, n1 = 1.30, Δ = 0.80% , V = 3.5, then how many modes will it have ??

a. 6.125
b. 9.655
c. 12.95
d. 16.55

 

Which kind of dispersion phenomenon gives rise to pulse spreading in single-mode fibers ??

a. Intramodal
b. Intermodal
c. Material
d. Group Velocity

 

With respect to single-mode and graded-index fibers, which parameter specifies the propagation of polarization modes with different phase velocities & the difference between their effective refractive indices ??

a. Mode field diameter
b. Birefringence
c. Fiber beat length
d. Spot Size

 

On which of the following factor/s do/does the ‘Hydrogen Effect’ depend/s ?? 

a. Type of fiber & Cable Design
b. Operating Wavelength
c. Installation Method
d. All of the above

 

Consider the statements given below. Which among them is not a drawback of the double crucible method ??

a. Utility in mass production of fibers
b. High attenuation
c. High OH content in drawn fiber
d. Addition of impurity while the fiber is drawn

 

MCQ On Optical Fiber Part 3: Optical Fiber Q & A

MCQ On Optical Fiber Part 3. This section includes 10 Multiple Choice Questions on Optical Fiber related to Electronics Engineering.

 

MCQ On Optical Fiber Part 3

 

Consider the assertions given below. Which is the correct sequential order of process adopted in glass fiber preparation ??

A. Drawing of fiber
B. Production of pure glass
C. Pulling of fiber
D. Conversion of pure glass into a preform

a. B, D, A, C
b. A, B, C, D
c. C, A, D, B
d. D, B, A, C

 

At which level of temperature does the oxidation process occur in MCVD ??

a. Low
b. Moderate
c. High
d. Unpredictable

 

Assuming no ISI, the maximum possible bandwidth of a multimode graded-index fiber with 5 MHz, shows the total pulse broadening of 0.1s for the distance of about 12km. What would be the value of bandwidth length product ??

a. 40 MHz
b. 60 MHz
c. 90 MHz
d. 120 MHz

 

In Rayleigh scattering of light in the glass, at which type of temperature does the glass attain the state of thermal equilibrium and exhibit its relativity to annealing temperature ??

a. Junction
b. Fictive
c. Breakdown
d. Decomposition

 

Which type of scattering occurs due to the interaction of light in a medium with time-dependent optical density variations thereby resulting in the change of energy (frequency) & path ??

a. Stimulated Brillouin Scattering (SBS)
b. Stimulated Raman Scattering (SRS)
c. Mie Scattering
d. Rayleigh Scattering

 

MCQ On Optical Fiber Part 3

The macroscopic bending losses show an exponential increase due to ________ in a radius of curvature ??

a. Increase
b. Decrease
c. Stability
d. None of the above

 

Which type of mechanical splicing exhibits the permanent bonding of prepared fiber ends with the rigid alignment of the tube ??

a. Snug Tube Splicing
b. Loose Tube Splicing
c. Elastomeric Splicing
d. Precision Pin Splicing

 

Which component of the fiber-optic connector has a provision of entry for the fiber along with the fixation to connector housing ??

a. Ferrule
b. Cable
c. Connector Housing
d. Coupling Device

 

Which among the following is regarded as a keyed bayonet connector along with its feasibility of easiest insertion and removal from the fiber optic cable ??

a. FC Connectors
b. LC Connectors
c. MT-RJ Connectors
d. ST Connectors

 

How many mating cycles are being rated by typically matched SC Connectors ??

a. 500
b. 600
c. 800
d. 1000

 

MCQ On Optical Fiber: Multiple Choice Q & A

MCQ On Optical Fiber. Part 4 contains 10 Multiple Choice Questions on Optical Fibre in Electronics Engineering.

 

MCQ On Optical Fiber

 

In an optical fiber communication system, which among the following is not a typical transmitter function ??

a. Coding for error protection
b. Decoding of input data
c. Electrical to optical conversion
d. Recoding to match output standard

 

Which among the following is provided by an optical receiver for the regeneration of data signal with minimum error ??

a. Photo-diode
b. Signal Processing Circuits
c. Linear Circuitry
d. None of the above

 

For a sine wave, the frequency is represented by the cycles per ______ ??

a. Second
b. Minute
c. Hour
d. None of the above

 

MCQs

 

Which property/ies of PCM stream determine/s the fidelity to the original analog signal ??

a. Sampling rate
b. Bit depth
c. Both a and b
d. None of the above

 

In single-mode fibers, how does the fraction of energy traveling through bound mode appear in the cladding ??

a. As a crescent wave
b. As a gibbous wave
c. As an evanescent wave
d. All of the above

 

Which among the following controls the length of the Fabry-Perot interferometer so that it can act as a tunable optical filter ??

a. Transducer
b. Tachometer
c. Multimeter
d. Phase-meter

 

In circulator, an optical path of signal follows _______ ??

a. An open-loop
b. A closed-loop
c. Both a and b
d. None of the above

 

MCQ On Optical Fiber

 

Which among the following is/are responsible for generating attenuation of optical power in fiber ??

a. Absorption
b. Scattering
c. Waveguide effect
d. All of the above

 

Consider the assertions/ characteristics given below. Which type of attenuation measurement technique exhibits these characteristics ??

1. Necessity of accessing both ends of the fiber.
2. Measurements corresponding to specific wavelengths.
3. Requirement of spectral response over a range of wavelengths.

a. Cutback Technique
b. Insertion Loss Technique
c. Use of OTDR Technique
d. None of the above

 

For neglecting the pulse dispersion in the digital systems, the RMS width of fiber impulse response must be _________ one-quarter of the pulse spacing ??

a. Less than
b. Equal to
c. Greater than
d. None of the above

 

Optical Fiber MCQ Part 3: MCQs Electronics Engineering

Optical Fiber MCQ Part 3. This part includes 10 Multiple Choice Questions on the topic of Optical Fiber MCQ.

 

Optical Fiber MCQ Part 3

 

What is the typical value of the refractive index for ethyl alcohol ??

a. 1
b. 1.36
c. 2.6
d. 3.4

 

If light travels in a certain medium and it gets reflected off an optically denser medium with a high refractive index, then it is regarded as _______ ??

a. External Reflection
b. Internal Reflection
c. Both a and b
d. None of the above

 

In an optical fiber, the concept of Numerical aperture is applicable in describing the ability of __________ ??

a. Light Collection
b. Light Scattering
c. Light Dispersion
d. Light Polarization

 

Which among the following do/does not support/s the soot formation process ??

a. OVPO
b. MCVD
c. PCVD
d. All of the above


Which type of photonic crystal fiber exhibit/s its/their similarity to the periodic crystalline lattice in a semiconductor ??

a. Index guiding fiber
b. Photonic bandgap fiber
c. Both a and b
d. None of the above

 

Optical Fiber MCQ Part 3

 

Which type of fiber optic cable has/have it’s/their core with the size of about 480 μm to 980 μm & made up of polymethylmethacrylate (PMMA) ??

a. Glass fiber optic cable
b. Plastic fiber optic cable
c. Plastic clad silica fiber optic cable
d. All of the above

 

In a multi-fiber cable system, which forms of outer jacket/s consist/s of polyolefin compounds and is regarded as halogen-free ??

a. OFNR
b. OFNP
c. LSZH
d. All of the above

 

During the design of the FOC system, which among the following reasons is/are responsible for an extrinsic absorption ??

a. Atomic defects in the composition of glass
b. Impurity atoms in glass material
c. Basic constituent atoms of fiber material
d. All of the above

 

Which among the following represent/s the measure/s to minimize the inhomogeneities for Mie scattering reduction ??

a. Extrusion Control
b. Increase in relative R.I. difference
c. Removal of imperfections due to glass manufacturing process
d. All of the above

 

In Kerr effect, induced index change has its proportionality with respect to _________ ??

a. square of electric field
b. cube of electric field
c. cube root of electric field
d. one-fourth power of electric field

 

Optical Fiber MCQ Part 2: Electronics Engineering MCQs

Optical Fiber MCQ Part 2. Multiple Choice Questions on Optical Fiber Part 2. This part includes 10 Multiple Choice Questions on Optical Fibre in Electronics Engineering. Optical Fiber MCQ Part 1

 

Optical Fiber MCQ Part 2

 

Which among the following is regarded as an inelastic scattering of a photon ??

a. Kerr Effect
b. Raman Effect
c. Hall Effect
d. Miller Effect

 

Which kind/s of misalignment assist/s in the reduction of overlap region in fiber ??

a. Angular
b. Longitudinal
c. Lateral
d. All of the above

 

Which is the correct order of sequential steps for an electric arc fusion technique ??

A. Pressing of fiber ends for fusion
B. Application of heat for smoothening of end-surfaces
C. Alignment of broken fiber edges

a. A, B, C
b. B, A, C
c. C, B, A
d. C, A, B

 

Which splicing technique involves the alignment and locking of broken fiber edges by means of positioning devices & optical cement ??

a. Fusion
b. Mechanical
c. Both a and b
d. None of the above

 

By using the Springroove splicing technique, what is the value of mean insertion loss for multi-mode graded-index fiber ??

a. 0.01
b. 0.03
c. 0.05
d. 0.09

 

Optical Fiber MCQ Part 2

In the fiber optic link, power transfer from one fiber to another and from fiber to detector must take place with _________ coupling efficiency ??

a. maximum
b. stable
c. minimum
d. unpredictable

 

In spontaneous emission, the light source in an excited state undergoes the transition to a state with _______ ??

a. Higher energy
b. Moderate energy
c. Lower energy
d. All of the above

 

Which among the following is a key process adopted for the laser beam formation as it undergoes light amplification ??

a. Spontaneous Emission
b. Stimulated Emission
c. Both a and b
d. None of the above

 

While coupling of LEDs with fiber, on which factor/s does the size of source and lighting angle generated within the semiconductor depends ??

a. Geometry of die
b. Refractive index of semiconductor
c. Encapsulation Medium
d. All of the above

 

Which among the following results in the removal of LED lens interface for achieving high coupling efficiency ??

a. Spherical lens
b. Cylindrical lens
c. Integral lens LED
d. All of the above

 

Optical Fiber MCQ: Multiple Choice Questions Optical Fiber

Optical Fiber MCQ. Multiple Choice Questions on Optical Fiber in Electronics Engineering. This part 1 includes 10 Multiple Choice Questions on Optical Fiber.

 

Optical Fiber MCQ

 

For a photo-diode with a responsivity of 0.50 A/W & optical power of about 12μW, what would be the value of generated photocurrent ??

a. 3 μA
b. 6 μA
c. 9 μA
d. 12 μA

 

Which component of an optical receiver is a linear frequency shaping filter used for the compensation of signal distortion and Inter Symbol Interference (ISI) ??

a. Photodetector
b. Amplifier
c. Equalizer
d. None of the above

 

In digital receivers, which codes are used to designate the sampled analog signals after their quantization into discrete levels ??

a. Binary
b. Decimal
c. ASCII
d. Excess-3

 

Which feature of an eye diagram assists in the measurement of additive noise in the signal ??

a. Eye-opening (height, peak to peak)
b. Eye overshoot/ undershoot
c. Eye width
d. None of the above

 

Which method determines the dispersion limitation of an optical link ??

a. Link power budget
b. Rise time budget
c. Both a and b
d. None of the above

 

Optical Fiber MCQ

 

Which phenomenon causes the dynamic linewidth broadening under the direct modulation of injection current ??

a. Modal Noise
b. Mode-partition Noise
c. Frequency Chirping
d. Reflection Noise

 

The speckle pattern is generated due to interference of nodes from a coherent source especially when the coherence time of source is _________ the intermodal dispersion time in the fiber ??

a. Less than
b. Greater than
c. Equal to
d. None of the above

 

Which among the following is/are determined by the fiber characterization ??

a. Fiber integrity & performance for desired transmission rate
b. Installation practices
c. Service Implementation
d. All of the above

 

From the tests carried out in fiber characterization, which among the following measures the total light reflected back to the transmitter caused by the fiber as well as the components like connector pairs and mechanical splices ??

a. ORL
b. OTDR
c. LTS
d. PMD

 

In fiber fault location, the equation of length (l) for time difference (t) is expressed as L = ct / 2n1 . Which factor in this equation implies that the light travels a length from source to breakpoint and then through another length on the return trip ??

a. L
b. c
c. t
d. 2

 

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