The linearity of narrow-band RF and microwave analogue optical transmitters can be improved by re-modulating their output by using an intensity modulator with controllable nonlinearity. The authors demonstrate linearisation of a distributed feedbaek (DFB) laser using a monolithically-integrated electroabsorption (EA) modulator. The spurious-free dynamic range of an unoptimised device is increased from 96 dBm/Hz2/3 to 117 dBm/Hz6/7.
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Westbrook et al. (1996) studied this question.
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