Q. ________ does not require an external modulator.

View solution

Q. The frequency deviation at frequencies above 1 MHz is typically ____________

View solution

Q. ___________ offers the potential for improving the coherent optical receiver sensitivity by increasing the choice of signalling frequencies.

View solution

Q. Eight level FSK and binary PSK yields an equivalent sensitivity.

View solution

Q. External modulation for ________ modulation format allows the most sensitive coherent detection mechanism.

View solution

Q. _________ can potentially provide spectral conservation through the use of multilevel signalling.

View solution

Q. The digital transmission on implementation of polarization modulation which involves polarization characteristics of the transmitted optical signal is known as _____________

View solution

Q. _________ heterodyne detection does not require phase matching between the incoming signal and the local oscillator.

View solution

Q. In ___________ detection, the phase of the local oscillator signal is locked to the incoming signal.

View solution

Q. The introduction of nonlinear element within the ______ is necessary to enable efficient carrier recovery.

View solution

Q. What is the main attraction of the optical homodyne detection?

View solution

Q. The phase difference between the local oscillator and the source must be ________ for high sensitivity reception.

View solution

Q. How many strategies of homodyne demodulation have proved to be successful for coherent optical fiber reception?

View solution

Q. In the __________ receiver, the incoming signal is not precisely shifted to the baseband.

View solution

Q. The use of PLL can be avoided in the intra-dyne detection.

View solution

Q. Phase diversity reception is also referred to as ______________

View solution

Q. The received signal through polarization diversity reception is linearly polarized.

View solution

Q. ASK with heterodyne detection can achieve same SNR limit as ASK with asynchronous detection.

View solution

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

View solution

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

View solution