A study on the effect of synchronization by an angle modulated signal in a single loop optoelectronic oscillator

Study on synchronisation capability enhancement of optoelectronic oscillator using dynamic control bandpass filter

“…This work closely follows the earlier work of Mukherjee et al [20], on synchronisation effects by an angle modulated signal in a [20] IET Optoelectron., 2018, Vol. 12 Iss.…”

“…As shown previously [20], the closed-loop equation of OEO under the influence of FM synchronising signal is…”

“…Towards finding the average value one can neglect the harmonic terms in (20). So in steady state form taking dϕ/dt = 0 is given by…”

“…When an OEO is in synchronisation with an externally injected FM signal, the characteristic property of the OEO is to transform the injected FM signal into AM which has been investigated in earlier work of Mukherjee et al [20]. The converted AM signal can be easily demodulated using a conventional square-law detector to retrieve the message signal.…”

“…Then the variation of practical locking range with different parameters, i.e. fibre delay, injection amplitude, modulation index and RF gain has been studied using this dynamic control scheme and compared with earlier work [20] both theoretically and numerically using Matlab® simulation. Finally, the ability of AM-to-FM conversion of this new scheme has also been compared with previous work by measuring the total harmonic distortion (THD) values of the reconstructed signals.…”