Improved resonance and chirp mechanisms for multigigabit/s push-pull modulated DFB lasers

Author

Flanigan, B.J. ; Carroll, J.E. ; Nowell, M.C. ; Plumb, R.G.S.

Author_Institution

Dept. of Eng., Cambridge Univ., UK

Volume

143

Issue

1

fYear

1996

fDate

2/1/1996 12:00:00 AM

Firstpage

49

Lastpage

56

Abstract

The internal resonance within a push-pull modulated DFB laser is investigated with numerical and analytical analysis. The classic photon-electron resonance is reduced in amplitude, and the operation of the laser is dominated by a new resonance which is dependant on the mode spacing between the main lasing mode and its nearest side mode. Simulations show that this allows modulation bandwidths well beyond the conventional photon-electron resonance limit, The interaction between the dominant modal resonance and the weaker photon-electron resonance leads to a novel time resolved chirp shape which improves the properties for transmission of a pulse along an optical fibre. This chirp shape can be tailored to further improve transmission properties by controlling the interaction between the resonances. Simulations of the time resolved chirp support published experimental results

Keywords

chirp modulation; distributed feedback lasers; laser feedback; laser modes; optical modulation; optical transmitters; semiconductor lasers; analytical analysis; chirp mechanisms; chirp shape; classic photon-electron resonance; internal resonance; laser operation; lasing mode; modal resonance; mode spacing; modulation bandwidths; multigigabit/s push-pull modulated DFB lasers; numerical analysis; photon-electron resonance; photon-electron resonance limit; pulse transmission; push-pull modulated DFB laser; side mode; time resolved chirp; time resolved chirp shape; transmission properties;

fLanguage

English

Journal_Title

Optoelectronics, IEE Proceedings -

Publisher

iet

ISSN

1350-2433

Type

jour

DOI

10.1049/ip-opt:19960137

Filename

487675