Q. What is the main drawback of the squeezer?

View solution

Q. The use of balanced receiver compensates the losses due to coupling optics.

View solution

Q. ___________ is the phenomenon which occurs in the single carrier systems due to small refractive index changes induced by the optical power fluctuations.

View solution

Q. _____________ is essentially a crude form of Amplitude shift keying.

View solution

Q. Almost _________ of the transmitter power is wasted in the use of external modulators.

View solution

Q. The line width in the range ________ of bit rate is specified for ASK heterodyne detection.

View solution

Q. ______________ is also referred to as on-off keying (OOK).

View solution

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