• The utilization in OEO of QWLD with ultralow phase noises (accordingly, PSD
of QWLD is equal to S PNL (F)).
• The suppression of DC component of the laser emission, which passes on the
photodetector, and hence, the suppression coefficient is equal to K
2
2Γ .
• The statistical correlation of noises at combining of the side optical harmonics on
the photodetector (accordingly, the suppression coefficient is equal to K
2
3Γ ).
Fig. 7.1 The structure of OEO MZ with sources of RF noise: the detected QWLD noise (1), the
own noise of PD (2), noises in the input and output of RF amplifier (3, 4) (а). The analog model of
the statistical process in OEO MZ with utilization of the random variable correlator (b). The
correlator consists of multipliers “Â,” the delay cell “T,” the adder “+,” the integrator, the
differential device, the RF amplifier “A,” the RF filter “F,” the coupler “С” (b)
368
7 Optoelectronic oscillator (OEO) as the Time and Spatial Correlator of Random. . .
of QWLD is equal to S PNL (F)).
• The suppression of DC component of the laser emission, which passes on the
photodetector, and hence, the suppression coefficient is equal to K
2
2Γ .
• The statistical correlation of noises at combining of the side optical harmonics on
the photodetector (accordingly, the suppression coefficient is equal to K
2
3Γ ).
Fig. 7.1 The structure of OEO MZ with sources of RF noise: the detected QWLD noise (1), the
own noise of PD (2), noises in the input and output of RF amplifier (3, 4) (а). The analog model of
the statistical process in OEO MZ with utilization of the random variable correlator (b). The
correlator consists of multipliers “Â,” the delay cell “T,” the adder “+,” the integrator, the
differential device, the RF amplifier “A,” the RF filter “F,” the coupler “С” (b)
368
7 Optoelectronic oscillator (OEO) as the Time and Spatial Correlator of Random. . .