Amplitude dependence on free running frequency
I am trying to design an Optoelectronic Oscillator using Optisystem 12.0, [it is an oscillator with both RF and optical output, with the optical output as intensity modulated signal]. Incidentally, the OEO does not oscillate. I have been able to achieve this using other simulation software [e.g. MATLAB SIMULINK 9.0], using Optisystem 12.0, a closed loop system [like RF PLL] can be modeled. There is a RF VCO in the library, but there is no option for giving an initial condition [initial voltage]. So, please help me what alternative can be done in this regard? Typically in the OEO whether the system will have amplitude dependence on the instantaneous frequency, which is a stringent requirement for any injection synchronized oscillator?
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