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Using the Dual Modulation Inputs of the LDX-3620B

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Using the Dual Modulation Inputs of the LDX-3620B

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As well as accepting two modulation signals, the results of which are shown above, the inputs will accept a modulation signal and an error feedback. The AC signal and DC feedback are supplied directly to the drive current without the complications of externally summing the error feedback to the modulation signal. The dual modulation inputs can also be used to supply a modulation signal and a DC offset from a DC voltage source to control the current. The benefit of dual modulation input is convenience in sensitive power and wavelength tuning applications. The results are higher resolution and repeatable measurements.

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