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Method for linearising analogue DFB lasers using an integrated MQW electroabsorption modulator

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4 Author(s)
L. D. Westbrook ; British Telecom Res. Labs., Ipswich, UK ; D. G. Moodie ; I. F. Lealman ; S. D. Perrin

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 feedback (DFB) laser using a monolithically-integrated electroabsorption (EA) modulator. The spurious-free dynamic range of an un-optimised device is increased from 96 dBm/Hz2/3 to 117 dBm/Hz6/7

Published in:

Electronics Letters  (Volume:32 ,  Issue: 2 )