Theoretical calculation of the linewidth enhancement factor of DFB lasers
Abstract
The linewidth enhancement factor alpha of a single-longitudinal-mode DFB laser is theoretically analyzed. It is shown that the oscillating wavelength should be selected at the wavelength 100-200 A shorter than that of the gain peak to obtain a smaller alpha value. It is also shown that the lower threshold gain gives a smaller linewidth enhancement factor.
- Publication:
-
Electronics Letters
- Pub Date:
- May 1986
- DOI:
- 10.1049/el:19860394
- Bibcode:
- 1986ElL....22..580O
- Keywords:
-
- Distributed Feedback Lasers;
- Laser Outputs;
- Semiconductor Lasers;
- Spectral Line Width;
- Gallium Arsenide Lasers;
- Indium Phosphides;
- Wavelengths;
- Lasers and Masers