</ul>
==== Probe Optimization ====
The [[NeoScan]] software monitors and controls the polarization of the optical beam in the system. The optimization status for each probe at each channel needs be maintained for an extended period of time. Not only an initial optimization process for each probe at each channel is needed, but also additional optimization processes are needed if the status is not maintained. In general, you have to perform optimization whenever you detach the fiber connectors from the fiber ports of the [[NeoScan]] system or when the fluctuation in the total return optical power and the polarization power are varied more than 20%. After the optimization procedure, the system is ready for real-time measurement or scan.
To get the maximum EO signal:
1. <ol><li><p>Move the probe around the CPW slot using the X or Y Miniature Translation Stages. </p></li><li><p>2. Position the probe right above the CPW slot.</p></li><li><p>3. Using the Z Miniature Translation Stage and lower the probe down close to the surface of CPW as much as possible.</p></li>Â Â 3.3.2 [[NeoScan]] Optimization Utility Program</ol>
==== [[NeoScan]] Optimization Utility Program ====
In order to initiate an optimization, it is assumed:
⢠<ul><li><p>The channel number and the Probe ID No. of the probe you want to optimize are selected.</p></li><li>⢠The steps described in section 3.2.2 in âOptimization Settings Pageâ have been done (GPIB address of the Lock-in Amplifier, Time Constant, and the Sensitivity, have been already chosen).</p></li><li>⢠Press âApplyâ button to start new probe optimization (Figure 3.7).</p></li></ul>
A user is presented with a dialog window shown in Figure 3.15, giving an option to initiates the optimization process â which will take about 20 minutes to be completed â or skip the optimization by choosing âNo.â Click on âYesâ for optimization. The system will remind a user to prepare an optimization structure. Align crystal field sensitivity direction to optimization structure field properly and press âContinueâ.