Title :
Measurement of the linewidth enhancement factor in DFB lasers using a high-resolution optical spectrum analyzer
Author :
Villafranca, Asier ; Lázaro, José A. ; Salinas, Iñigo ; Garcés, Ignacio
Author_Institution :
Opt. & Broad-Band Commun. Group, Huesca, Spain
Abstract :
Linewidth enhancement factor (also know as chirp parameter is calculated for two distributed feedback lasers using the linewidth asymptotic behavior predicted by Schawles-Townes and Henry. A high-resolution optical spectrum analyzer (BOSA) is used to measure power and linewidth. Comparison with widely accepted network analyzer method is performed with very good agreement.
Keywords :
chirp modulation; distributed feedback lasers; laser variables measurement; semiconductor lasers; spectral analysers; spectral line breadth; spectroscopy; DFB lasers; chirp parameter; distributed feedback lasers; high-resolution analyzer; linewidth asymptotic behavior; linewidth enhancement factor; network analyzer; optical spectrum analyzer; semiconductor lasers; Chirp; Distributed feedback devices; Laser feedback; Laser theory; Optical feedback; Optical interferometry; Power lasers; Power measurement; Semiconductor lasers; Spectral analysis; Laser measurements; optical spectroscopy; semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.857231
