Q. In a ______________ receiver, the analyses of signal and noise phenomena are more complicated than in the IM-DD case.

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Q. FSK modulation is attributed to the use of __________ frequencies unlike ASK modulation.

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Q. BER of FSK modulation scheme is ________ as/to the ASK modulation scheme.

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Q. ___________ can also be used in place of multilayered filters in the dual filter direct detection FSK receiver.

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Q. FSK synchronous detection is _________ more sensitive than asynchronous heterodyne detection.

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Q. The asynchronous heterodyne detection is _________ more sensitive than the dual filter direct detection FSK receiver.

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Q. The use of __________ was undertaken to separate the polarization in an analog to digital conversion.

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Q. A major attribute of coherent optical transmission was its ability to provide _______________ for future multicarrier systems and networks.

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Q. The channel width is narrow for the coherent systems than the WDM systems.

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Q. The technique within the coherent multicarrier systems used to broadcast the optical signals over the network is the use of passive _____________

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Q. Estimate the minimum transmitter power if number of photons per bit are 150, wavelength 1.3 micrometer with an optical bandwidth of 20 THz.

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Q. The performance degradation due to nonlinear phase noise is referred to as _____________

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Q. ______________ facilitates the doubling of the feasible spectral efficiency through the transmission of independent information in each of the two orthogonal polarizations.

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Q. ____________ is a transparent multiplexing technique.

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Q. Which of the following is not a drawback of POLMUX?

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Q. A multicarrier modulation format in which there has been growing interest to compensate for impairments in optical fiber transmission systems is _______________

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Q. It is suggested that the technique with high white noise is an attractive option for use in long haul systems.

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