Title :
Frequency chirp in optical reflection modulators
Author_Institution :
Dept. of Electr. & Electron. Eng., Manchester Metropolitan Univ., UK
Abstract :
Pulse broadening produced by positive frequency chirping resulting from the intensity modulation processes used in optical communications limits the maximum achievable transmission distance. Although compensation schemes have been the subject of much research any improvements possible at the initial modulation stage will further enhance system performance. In the present paper the chirping behaviour of resonant modulators is considered and an expression analogous to the chirp parameter given. Using the example of an InGaAsP Franz-Keldysh effect reflection modulator the chirp introduced by a resonant device is quantified and the implications of the results considered
Keywords :
III-V semiconductors; chirp modulation; electro-optical modulation; electroabsorption; electroreflectance; gallium arsenide; indium compounds; light reflection; optical communication equipment; optical fibre communication; pulse modulation; Franz-Keldysh effect reflection modulator; InGaAsP; frequency chirp; intensity modulation processes; maximum achievable transmission distance; optical communications; optical reflection modulators; positive frequency chirping; pulse broadening; resonant device; resonant modulators; system performance;
Conference_Titel :
Towards Terabit Transmission, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19950716