Influence of waveguiding properties on the longitudinal spectrum of GaAs injection lasers
Abstract
Effective spectral gain and spontaneous emission coefficient of semiconductor stripe lasers are calculated taking account of lateral photon and inversion density distributions. The spontaneous emission coefficient of the lasing wavelength at maximum of the effective gain is determined. Based on multimode rate equations the longitudinal emission spectrum is calculated numerically. Both, photon and inversion density distribution affect the wavelength of the lasing mode but not the curvature of the effective gain at gain maximum. Longitudinal multimode operation at elevated injection current requires a spontaneous emission coefficient alpha equal to or greater than 0.0001, obtained in lasers with a large strength of astigmatism. Longitudinal monomode operation is usually achieved in lasers with dominating passive waveguiding.
- Publication:
-
Archiv Elektronik und Uebertragungstechnik
- Pub Date:
- August 1982
- Bibcode:
- 1982ArElU..36..323S
- Keywords:
-
- Emission Spectra;
- Gallium Arsenide Lasers;
- Injection Lasers;
- Laser Outputs;
- Optical Waveguides;
- Laser Modes;
- Lasing;
- Power Gain;
- Spontaneous Emission;
- Lasers and Masers