Title :
Design rules for a low-chirp integrated DFB laser with an electroabsorption modulator
Author :
Lestra, Alexis ; Brosson, Philippe
Author_Institution :
Div. of Optoelectron. Components, Alcatel Corp. Res. Centre, Marcoussis, France
Abstract :
Feedback from the front facet of an integrated DFB laser with an electroabsorption modulator generates additional chirp to the single modulator. The reduction of the sensitivity to that feedback is in tradeoff relation with the external differential quantum efficiency and the single-mode yield. We introduce a figure-of-merit for the feedback sensitivity. It is obtained from the modeling of the small signal frequency modulation (FM). It indicates design rules for low-chirp and high-efficiency devices.
Keywords :
chirp modulation; distributed feedback lasers; electro-optical modulation; electroabsorption; frequency modulation; integrated optics; laser feedback; laser modes; semiconductor lasers; sensitivity; design rules; electroabsorption modulator; external differential quantum efficiency; feedback; figure-of-merit; front facet; high-efficiency devices; low-chirp devices; low-chirp integrated DFB laser; sensitivity; single modulator; single-mode yield; small signal frequency modulation; Chirp modulation; Frequency modulation; Integrated optics; Laser feedback; Laser modes; Optical design; Optical devices; Optical feedback; Optical modulation; Phase modulation;
Journal_Title :
Photonics Technology Letters, IEEE
