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ice:servo-opls [2019/11/18 15:31]
Michael Radunsky [Calculating Phase Noise]
ice:servo-opls [2019/11/18 15:33]
Michael Radunsky [Understanding the Transfer Function]
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-The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref xferfunc> However, the OPLS will typically be used to control a //frequency//-tunable device (such as a laser). In this configuration, the effective loop filter is not the one shown in <imgref opls_side_panel>, but includes a extra integration corresponding to converting the phase-error input to a frequency error. Thus, ω<sub> </sub>sets the frequency transition from single-integration to double-integration and ω<sub>I </sub> from single-integration to proportional feedback. It is important to understand this 'hidden' integrator when configuring the loop filter parameters. +The charge pump in the OPLS outputs a signal proportional to the phase-error and the transfer function is as shown in <imgref xferfunc> However, the OPLS will typically be used to control a //frequency//-tunable device (such as a laser). In this configuration, the effective loop filter is not the one shown in <imgref xferfunc>, but includes a extra integration corresponding to converting the phase-error input to a frequency error. Thus, ω<sub> </sub>sets the frequency transition from single-integration to double-integration and ω<sub>I </sub> from single-integration to proportional feedback. It is important to understand this 'hidden' integrator when configuring the loop filter parameters. 
  
 =====Calculating Phase Noise ===== =====Calculating Phase Noise =====
ice/servo-opls.txt · Last modified: 2019/11/18 15:34 by Michael Radunsky