Precise characterization of the frequency chirp in directly modulated DFB lasers

Author

Villafranca, Asier ; Lasobras, Javier ; Garcés, Ignacio

Author_Institution

Univ. of Zaragoza, Zaragoza

fYear

2007

fDate

Jan. 31 2007-Feb. 2 2007

Firstpage

173

Lastpage

176

Abstract

We report on results from the characterization of the frequency chirp characteristics of distributed feedback (DFB) lasers under direct modulation conditions. Parameters describing transient and adiabatic chirp effects are measured for a DFB laser from the ratio of phase to amplitude modulation factors when modulated with sine waves using a high-resolution optical spectrum analyzer. Transient and adiabatic chirp effects produced under digital non-return to zero (NRZ) amplitude modulation are also analyzed using the emitted optical spectrum. Finally, results from the measurement technique are compared with those obtained from measured optical spectra.

Keywords

amplitude modulation; chirp modulation; distributed feedback lasers; laser beams; optical modulation; phase modulation; semiconductor lasers; spectral analysers; adiabatic chirp effects; amplitude modulation; directly modulated DFB lasers; distributed feedback lasers; frequency chirp characterization; high-resolution optical spectrum analyzer; semiconductor lasers; sine waves; transient chirp effects; Amplitude modulation; Chirp modulation; Distributed feedback devices; Frequency; Laser feedback; Optical feedback; Optical modulation; Phase measurement; Stimulated emission; Transient analysis; Laser measurements; optical spectroscopy; semiconductor lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices, 2007 Spanish Conference on

Conference_Location

Madrid

Print_ISBN

1-4244-0868-7

Type

conf

DOI

10.1109/SCED.2007.384020

Filename

4271197