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Modulating Laser Diodes

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Modulating Laser Diodes

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The external modulation feature found on many ILX Lightwave current sources is a very fl exible circuit that can be used for a wide variety of applications. If the task is to slightly dither the current to produce laser linewidth broadening or wavelength control, small signal analog modulation is easily possible. If the task requires the laser output to be amplitudemodulated at audio frequencies or higher, it can still be easily done by directly modulating the current source. If a digital style of pulse is required where the leading and trailing edges are sharp and discontinuous, modulation of the current source may still be acceptable.

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