209 Optogalvanic Stabiliser PL2-M, PL3, PL5 Lasers


209 Optogalvanic Stabiliser PL2-M, PL3, PL5 Lasers
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Code: 209
Vendor: Edinburgh Instruments

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Model 209 Optogalvanic Stabiliser PL2-M, PL3, PL5 Lasers

 

In operation a small modulation voltage is applied to the piezo-electric cavity length tuner and the resulting effect on the discharge current is measured via a resistor in series with the discharge. This signal, which is produced by the optogalvanic effect, is detected via a phase sensitive detector to give a DC signal which is minimised using negative feedback to lock the laser to line centre.

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