Title :
Precise characterization of the frequency chirp in directly modulated DFB lasers
Author :
Villafranca, Asier ; Lasobras, Javier ; Garcés, Ignacio
Author_Institution :
Univ. of Zaragoza, Zaragoza
fDate :
Jan. 31 2007-Feb. 2 2007
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;
Conference_Titel :
Electron Devices, 2007 Spanish Conference on
Conference_Location :
Madrid
Print_ISBN :
1-4244-0868-7
DOI :
10.1109/SCED.2007.384020
