Title :
Method for linearising analogue DFB lasers using an integrated MQW electroabsorption modulator
Author :
Westbrook, L.D. ; Moodie, D.G. ; Lealman, I.F. ; Perrin, S.D.
Author_Institution :
British Telecom Res. Labs., Ipswich, UK
fDate :
1/18/1996 12:00:00 AM
Abstract :
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
Keywords :
III-V semiconductors; distributed feedback lasers; electro-optical modulation; electroabsorption; gallium arsenide; gallium compounds; indium compounds; integrated optics; integrated optoelectronics; laser feedback; optical transmitters; quantum well lasers; InGaAs-InGaAsP; analogue DFB laser linearisation; controllable nonlinearity; distributed feedback laser; integrated MQW electroabsorption modulator; intensity modulator; microwave analogue optical transmitters; monolithically-integrated electroabsorption modulator; narrow-band RF optical transmitters; re-modulating; spurious-free dynamic range; un-optimised device;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19960037
