1) In the dynamic response of Injection Laser Diode (ILD), the delay which is followed by ____ frequency damped oscillations give rise to the generation of relaxation oscillations. a. Low b. Medium c. High d. All of the above
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2) The spectral response of an ideal photodetector depicts its efficiency as a function of _________ a. amplitude b. frequency c. period d. wavelength
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3) According to frequency response of photo-detector, the modulation frequency at which the output current decreases to ________of peak value. a. one-third b. one-fourth c. half d. one-tenth
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4) Which photodiodes are crucially applicable to overcome the bandwidth-quantum efficiency trade-off along with its resemblence to the pyramid structure? a. Mushroom Waveguide Photodiode b. Traveling Wave Photodiode c. Resonant Cavity Photodiode d. All of the above
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5) When an optical signal is incident on a photo-detector, which noise originate/s due to 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
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6) In an eye-diagram, digital signals with very bad interference resembles the shape of _____ a. circle b. rectangle c. triangle d. straight line
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7) On which factor/s do/does the response time of photodiode depend/s? a. Diffusion time of photo carriers outside the depletion region b. Diffusion time of photo carriers within the depletion region c. RC time constant d. All of the above
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8) Which nature of charge carriers give rise to the current fluctuations thereby resulting into the generation of shot noise? a. Continuous b. Discrete c. Sampled d. All of the above
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9) 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
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10) In an optical network, increase in the number of lasers ________the bit rate. a. Increases b. Stabilizes c. Decreases d. None of the above
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11) 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
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12) Basically, solitons are pulses which propagates through the fiber without showing any variation in ______ a. Amplitude b. Velocity c. Shape d. All of the above
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13) Why is an 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
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14) For measuring the shape of input pulse in 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%
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15) 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
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16) 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
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17) 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
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