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David Notebook: Difference between revisions
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I found the response curve to be Voltage <math> = 1.77ln(</math>Power<math>) - 6.00 </math> with Power in nW for the output of the lock-in amplifier set at 50 mV sensitivity using the UDT photodiode and 780 nm light. I used 780 since it gives a much more stable output than the HeNe.
Accounting for the sensitivity, the equation becomes Voltage*Sensitivity <math> = .0921ln(</math>Power<math>) - 0.3224 </math>The photodiode is about 86% as sensitive at 633 as 780, so 633 powers should be 16% higher. Then for 633 light, we should have Voltage <math> = 1.16*</math>Voltage*Sensitivity <math> = .0921ln(</math>Power<math>) - 0.3224</math>
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