Differences

This shows you the differences between two versions of the page.

--- ffc:100 [2023/08/17 19:01] – [FPGA Control] Michael Radunsky
+++ ffc:100 [2023/08/17 19:02] – [FPGA Control] Michael Radunsky
@@ Line 77: / Line 77: @@
 | {{ :take-note.png?50&nolink }}  | Visit these pages for the appropriate offset phase lock servo manual \\ [[ffc:locking_electronics:slice-fpga|SLICE-FPGA manual]] \\ [[ffc:locking_electronics:slice-fpga-ii|SLICE-FPGA-II manual]]  |\\
-The two channels SLICE-FPGA or SLICE-FPGA-II Offset Phase Lock Servo can be used to control a self-referenced phase lock of ƒ<sub>CEO</sub> and ƒ<sub>opt</sub> to a reference laser such as [[https://stabilaser.dk/stabilized-laser/|the Sabilaser 1542]] or [[https://rio-lasers.com/1550nm-laser-diode/|the RIO Planex]].
+The two channels of the SLICE-FPGA or SLICE-FPGA-II Offset Phase Lock Servo can be used to control a self-referenced phase lock of ƒ<sub>CEO</sub> and a lock of ƒ<sub>opt</sub> to a reference laser such as [[https://stabilaser.dk/stabilized-laser/|the Sabilaser 1542]] or [[https://rio-lasers.com/1550nm-laser-diode/|the RIO Planex]].
 ====Slow Loop Feedback====
 Slow servo functionality is designed to allow indefinite FOPT locking times despite long-term drifts in the reference laser’s frequency outside the dynamic range of the FFC’s PZT feedback. This is achieved by slow temperature feedback to the oscillator of the FFC, which locks the PZT output voltage to a setpoint voltage near the middle of its dynamic range. To enable the slow servo, first lock FOPT normally, with the DAC 1 slider as close to centered as possible. Next, navigate to the home screen of the FFC-100 and press the “Slow Servo” button at the top of the screen (<imgref ss_home> and <imgref ss_enabled> ).