Springer Online Journal Archives 1860-2000
Abstract A theoretical analysis of single-frequency lasing is carried out in the framework of the quasimonochromatic field method with variable field amplitude and phase. The spectral optical-line profile, the spectral distribution of the laser output-power fluctuations, and the spectral distribution of the active-region density fluctuations (of the p-n voltage fluctuations) are obtained. In contrast to the known work in this field, the analysis in the present paper is carried out consistently starting with the wave equation and with account taken of the wavelike character of the radiation propagation in the active region. This has made it possible to express the final distributions in terms of quantities that are most readily measurable. Allowance for thermodynamic fluctuations has revealed an additional lasing-line broadening independent of the laser power. The analysis is not confined to lasing in the diode's own cavity, but takes into account also the possibility of using an external cavity, and corresponding varying the optical line spectral distributions, the output-power fluctuations, and p-n junction voltage fluctuations.
Type of Medium: