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| groups:mg:experiment:laser:285nmlaser [2017/05/03 11:39] – [Turning on the Laser] wfriesen | groups:mg:experiment:laser:285nmlaser [2022/04/06 05:51] (current) – [Locking to Iodine-Spectroscopy] wfriesen | ||
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| * Move the crosshair to the second slope, rightclick on press //PID: Lock to Slop//. | * Move the crosshair to the second slope, rightclick on press //PID: Lock to Slop//. | ||
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| + | * **Troubleshooting** | ||
| + | * If signal in DigiLock-Software does not update/ signal is frozen | ||
| + | * If signal in DigiLock-Software does not show the usual error-signal at correct frequency, but is saturated at left and right edge of the frame (see picture) -> Check the ref input for the lock-in-amplifier (near the iodine spectroscopy). Probably the input signal is too low. It should be slightly higher than 2 V (~2.2V works fine).{{ : | ||
| ===== Lasersystem - Typical power values ===== | ===== Lasersystem - Typical power values ===== | ||
| The 285nm SHG was build by Jan Friebe and is described in his diplomathesis. | The 285nm SHG was build by Jan Friebe and is described in his diplomathesis. | ||